25 results on '"E. Cimen"'
Search Results
2. P.227 Psychiatric drug use in pregnancy: retrospective analysis of data from a psychiatry hospital
- Author
-
A.N. İnci Kenar and E. Cimen
- Subjects
Pharmacology ,Psychiatry and Mental health ,Neurology ,Pharmacology (medical) ,Neurology (clinical) ,Biological Psychiatry - Published
- 2019
- Full Text
- View/download PDF
3. AN OVERVIEW TO THE INTERSTITIAL LUNG DISEASES RELATED TO CONNECTIVE TISSUE DISEASES: A RETROSPECTIVE ANALYSIS.
- Author
-
Colak, S., Tekgoz, E., Gunes, E. Cimen, Ocal, N., Dogan, D., Tasci, C., Çınar, M., and Yilmaz, S.
- Published
- 2023
- Full Text
- View/download PDF
4. THE CHARACTERISTICS OF THE PATIENTS UNDER NINTEDANIB TREATMENT DUE TO INTERSTITIAL LUNG DISEASES ASSOCIATED WITH CONNECTIVE TISSUE DISEASES.
- Author
-
Tekgoz, E., Colak, S., Gunes, E. Cimen, Ocal, N., Dogan, D., Tasci, C., Çınar, M., and Yilmaz, S.
- Published
- 2023
- Full Text
- View/download PDF
5. Three-dimensional virtual simulation of mandibular autorotation in orthognathic surgery
- Author
-
Johan V.S. Abeloos, G. Swennen, K. Nagy, C. De Clercq, and E. Cimen
- Subjects
Orthodontics ,Otorhinolaryngology ,Autorotation ,business.industry ,medicine.medical_treatment ,Orthognathic surgery ,medicine ,Surgery ,Oral Surgery ,business - Published
- 2013
- Full Text
- View/download PDF
6. Assessment of genotoxic effects in patients treated with titanium alloy endosseous implants or miniplates by micronucleus assay
- Author
-
Ela Kadioglu, A.M. Tuzuner-Oncul, R.S. Kisnisci, Esra Emerce, E. Cimen, and Bensu Karahalil
- Subjects
business.industry ,Metallurgy ,Micronucleus test ,Dentistry ,Medicine ,Titanium alloy ,Endosseous implants ,In patient ,General Medicine ,Toxicology ,business - Published
- 2010
- Full Text
- View/download PDF
7. Importance of infarct topography in determination of stroke mechanism and recurrence risk: a post-hoc analysis of the dabigatran acute treatment of stroke trial.
- Author
-
Cimen E, Ng K, Buck BH, Field T, Coutts SB, Gioia LC, Hill MD, Miller J, Benavente OR, Sharma M, and Butcher K
- Subjects
- Aged, Aged, 80 and over, Female, Humans, Male, Middle Aged, Antithrombins therapeutic use, Antithrombins administration & dosage, Ischemic Attack, Transient drug therapy, Retrospective Studies, Secondary Prevention methods, Stroke drug therapy, Stroke etiology, Stroke prevention & control, Multicenter Studies as Topic, Randomized Controlled Trials as Topic, Clinical Trials, Phase II as Topic, Dabigatran therapeutic use, Dabigatran administration & dosage, Diffusion Magnetic Resonance Imaging methods, Ischemic Stroke drug therapy, Ischemic Stroke diagnostic imaging, Ischemic Stroke prevention & control, Recurrence
- Abstract
Objective: To evaluate the relationship between infarct pattern, inferred stroke mechanism and risk of recurrence in patients with ischaemic stroke. The question is clinically relevant to optimise secondary stroke prevention investigations and treatment., Design: We conducted a retrospective analysis of the dabigatran treatment of acute stroke II (DATAS II) trial (ClinicalTrials.gove NCT NCT02295826), in which patients underwent diffusion-weighted imaging (DWI) at baseline and 30 days after randomisation to one of two antithrombotic therapies. Patients were classified as embolic, isolated small subcortical infarcts or transient ischaemic attack TIA (no infarct) at baseline and day 30. Stroke mechanism was determined by traditional and modified (based on DWI lesion findings) Trial of Org 10 172 in Acute Stroke Treatment (TOAST) criteria (DWI-TOAST)., Setting: Multicentre (6) tertiary acute stroke treatment hospitals., Participants: 305 adults with minor ischaemic stroke (National Institutes of Health Stroke Scale (NIHSS) score≤9)., Results: Of 305 patients, 148 had embolic pattern infarcts, 93 were isolated small subcortical infarcts and 64 had no infarct on baseline MRI (TIA). In the absence of DWI, TOAST classification indicated the mechanism was cryptogenic in 147 patients (48.2%), and small-vessel occlusion in 127 (41.6%). Using, DWI-TOAST, the number of cryptogenic strokes decreased to 123 (40.3%), and the number of small-vessel occlusion strokes increased to 151 (49.5%). Recurrent infarcts were seen in 13% of patients with an MRI-defined embolic infarct pattern and cryptogenic mechanism on DWI-TOAST. The relative risk of recurrent infarction in patients with undetermined aetiology was increased compared with other categories (standardised coefficient=1.0 (0.1, 1.9), p=0.029). The topography of recurrent infarcts was most often embolic (60.9%), but in 39.1% an isolated small subcortical infarct was seen., Conclusions: Definitive identification of infarct topography with DWI has a significant impact on infarct mechanism classification. The variable relationship between baseline infarct patterns, clinical presentation and recurrent infarct distribution is a challenge to both the lacunar and embolic stroke of uncertain source (ESUS) concepts. Irrespective of aetiological classification, patients with MRI-defined cryptogenic embolic pattern infarcts are at high risk for recurrent events., Trial Registration Number: Linked to the DATAS II trial., Clinicaltrials: gov ID NCT02295826., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2025. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ Group.)
- Published
- 2025
- Full Text
- View/download PDF
8. Predicting phenotypes from genetic, environment, management, and historical data using CNNs.
- Author
-
Washburn JD, Cimen E, Ramstein G, Reeves T, O'Briant P, McLean G, Cooper M, Hammer G, and Buckler ES
- Subjects
- Crops, Agricultural growth & development, Data Mining, Machine Learning, Zea mays growth & development, Crops, Agricultural genetics, Genomics methods, Neural Networks, Computer, Phenotype
- Abstract
Key Message: Convolutional Neural Networks (CNNs) can perform similarly or better than standard genomic prediction methods when sufficient genetic, environmental, and management data are provided. Predicting phenotypes from genetic (G), environmental (E), and management (M) conditions is a long-standing challenge with implications to agriculture, medicine, and conservation. Most methods reduce the factors in a dataset (feature engineering) in a subjective and potentially oversimplified manner. Deep neural networks such as Multilayer Perceptrons (MPL) and Convolutional Neural Networks (CNN) can overcome this by allowing the data itself to determine which factors are most important. CNN models were developed for predicting agronomic yield from a combination of replicated trials and historical yield survey data. The results were more accurate than standard methods when tested on held-out G, E, and M data (r = 0.50 vs. r = 0.43), and performed slightly worse than standard methods when only G was held out (r = 0.74 vs. r = 0.80). Pre-training on historical data increased accuracy compared to trial data alone. Saliency map analysis indicated the CNN has "learned" to prioritize many factors of known agricultural importance., (© 2021. This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply.)
- Published
- 2021
- Full Text
- View/download PDF
9. Building a tRNA thermometer to estimate microbial adaptation to temperature.
- Author
-
Cimen E, Jensen SE, and Buckler ES
- Subjects
- Anticodon chemistry, Anticodon metabolism, Archaea classification, Archaea metabolism, Bacteria classification, Bacteria metabolism, Base Pairing, Base Sequence, Computer Simulation, Models, Genetic, Neural Networks, Computer, Nucleic Acid Conformation, Phylogeny, RNA Stability, RNA, Transfer genetics, RNA, Transfer metabolism, Temperature, Thermometers, Adaptation, Physiological genetics, Archaea genetics, Bacteria genetics, Genome, Archaeal, Genome, Bacterial, RNA, Transfer chemistry
- Abstract
Because ambient temperature affects biochemical reactions, organisms living in extreme temperature conditions adapt protein composition and structure to maintain biochemical functions. While it is not feasible to experimentally determine optimal growth temperature (OGT) for every known microbial species, organisms adapted to different temperatures have measurable differences in DNA, RNA and protein composition that allow OGT prediction from genome sequence alone. In this study, we built a 'tRNA thermometer' model using tRNA sequence to predict OGT. We used sequences from 100 archaea and 683 bacteria species as input to train two Convolutional Neural Network models. The first pairs individual tRNA sequences from different species to predict which comes from a more thermophilic organism, with accuracy ranging from 0.538 to 0.992. The second uses the complete set of tRNAs in a species to predict optimal growth temperature, achieving a maximum ${r^2}$ of 0.86; comparable with other prediction accuracies in the literature despite a significant reduction in the quantity of input data. This model improves on previous OGT prediction models by providing a model with minimum input data requirements, removing laborious feature extraction and data preprocessing steps and widening the scope of valid downstream analyses., (Published by Oxford University Press on behalf of Nucleic Acids Research 2020.)
- Published
- 2020
- Full Text
- View/download PDF
10. Deep learning for plant genomics and crop improvement.
- Author
-
Wang H, Cimen E, Singh N, and Buckler E
- Subjects
- Genomics, Phenotype, Plants genetics, Deep Learning, Genome, Plant
- Abstract
Our era has witnessed tremendous advances in plant genomics, characterized by an explosion of high-throughput techniques to identify multi-dimensional genome-wide molecular phenotypes at low costs. More importantly, genomics is not merely acquiring molecular phenotypes, but also leveraging powerful data mining tools to predict and explain them. In recent years, deep learning has been found extremely effective in these tasks. This review highlights two prominent questions at the intersection of genomics and deep learning: 1) how can the flow of information from genomic DNA sequences to molecular phenotypes be modeled; 2) how can we identify functional variants in natural populations using deep learning models? Additionally, we discuss the possibility of unleashing the power of deep learning in synthetic biology to create novel genomic elements with desirable functions. Taken together, we propose a central role of deep learning in future plant genomics research and crop genetic improvement., (Copyright © 2020 The Authors. Published by Elsevier Ltd.. All rights reserved.)
- Published
- 2020
- Full Text
- View/download PDF
11. Oncologists awareness about bisphosphonate related osteonecrosis of the jaws.
- Author
-
Senturk MF, Cimen E, Tuzuner Oncul AM, and Cambazoglu M
- Subjects
- Attitude of Health Personnel, Bone Density Conservation Agents adverse effects, Bone Density Conservation Agents therapeutic use, Health Care Surveys, Health Knowledge, Attitudes, Practice, Humans, Medication Therapy Management, Referral and Consultation, Surveys and Questionnaires, Turkey epidemiology, Bisphosphonate-Associated Osteonecrosis of the Jaw diagnosis, Bisphosphonate-Associated Osteonecrosis of the Jaw epidemiology, Bisphosphonate-Associated Osteonecrosis of the Jaw prevention & control, Diphosphonates adverse effects, Diphosphonates therapeutic use, Oncologists statistics & numerical data
- Abstract
Objective: To evaluate the oncologists thoughts about the positive and adverse effects of bisphosphonates, drug holiday and the awareness about BRONJ., Methods: A written questionnaire was sent to 7 hospitals, which have oncology facilities in Ankara, Turkey. Results were evaluated as percentages. Chi Square and Kruskal Wallis H test was used to analyze the data., Results: A total of 53 oncologists replied to the questionnaire. BRONJ is the most seen complication (66%) due to bisphosphonates usage. Temporary suspension of the drug (52.8%) is the best treatment choice for this complication. Oncologists usually prefered dentist consultatation (39.6%)., Conclusions: A good cooperation of oncologists and dentists is very important to prevent BRONJ.
- Published
- 2016
12. Micronucleus assay assessment of possible genotoxic effects in patients treated with titanium alloy endosseous implants or miniplates.
- Author
-
Karahalil B, Kadioglu E, Tuzuner-Oncul AM, Cimen E, Emerce E, and Kisnisci RS
- Subjects
- Alloys, Cells, Cultured, Dental Implantation, Endosseous, Epithelial Cells drug effects, Epithelial Cells metabolism, Gingiva cytology, Humans, Micronuclei, Chromosome-Defective drug effects, Micronucleus Tests, Mouth Mucosa cytology, Postoperative Period, Preoperative Period, Biocompatible Materials adverse effects, DNA Damage, Dental Implants adverse effects, Titanium adverse effects
- Abstract
The use of titanium and its alloys (Ti-6Al-4V) for oral surgery has increased dramatically in recent years. Ti is a stable biocompatible metal suitable for oral applications and it has been used for endosseous subperiosteal implants and miniplate fixation for more than 25 years. Dental implants are typically made of Ti or Ti alloys. The alloys are potentially toxic due to release of vanadium and aluminum. We tested the possible genotoxicity of Ti alloy endosseous implants and miniplates on the oral mucosal tissues of two groups of patients: 17 patients receiving Ti miniplate and screw fixation, and 37 endosseous dental implant placement patients. Preoperative and postoperative mucogingival cell samples were collected. Genotoxicity was assessed by the micronucleus assay (MN). There were slight but not statistically significant increases in the frequencies of MN (p=0.087 and p=0.047) post-operation in both groups. In summary, neither of the applications showed genotoxicity in the oral epithelial cells of patients., (Copyright © 2013 Elsevier B.V. All rights reserved.)
- Published
- 2014
- Full Text
- View/download PDF
13. Adenomatoid hyperplasia of the minor salivary glands on the buccal mucosa: A rare case report.
- Author
-
Dereci O and Cimen E
- Abstract
Introduction: Adenomatoid hyperplasia of the minor salivary glands is a hyperplastic oral lesion which may be seen on minor salivary gland bearing areas on all oral mucosa, especially on soft and hard palate. This study reports a rare case of buccal adenomatoid hyperplasia of the minor salivary glands and discusses the clinical significance., Presentation of Case: 48 year old male patient presented with a complaint of a swelling on his left cheek. Clinical examination revealed a bluish mass on the buccal mucosa. A provisional diagnosis of salivary gland neoplasm was made and the lesion was excised under local anesthesia. The histological diagnosis was adenomatoid hyperplasia of the minor salivary glands., Discussion: Buccal localization of the adenomatoid hyperplasia of the minor salivary glands is quite uncommon in the literature. There are two cases in the English literature for our knowledge. In the clinical examination, the nodular and protuberated appearance of the lesion resembles buccal minor salivary gland tumors and vascular lesions. Histological analysis is fundamental to achieve correct diagnosis., Conclusion: The differential diagnosis of buccal nodular, exophytic and colored mucosal lesions should include adenomatoid hyperplasia of the minor salivary glands., (Copyright © 2014 The Authors. Published by Elsevier Ltd.. All rights reserved.)
- Published
- 2014
- Full Text
- View/download PDF
14. Effects of gamma irradiation on cell cycle, apoptosis and telomerase activity in p53 wild-type and deficient HCT116 colon cancer cell lines.
- Author
-
Halacli SO, Canpinar H, Cimen E, and Sunguroglu A
- Abstract
Radiotherapy serves as adjunctive treatment to chemotherapy and surgical resection of colorectal cancer. However, the cellular response to irradiation varies depending on the expression of tumor suppressor p53, which plays a significant role in the regulation of cell cycle arrest, apoptosis and telomerase activity in various cancers. The present study aimed to investigate cell cycle arrest, apoptosis and telomerase activity with respect to p53 expression in p53 wild-type (+/+) and deficient (-/-) HCT116 colon cancer cell lines following 5 Gy γ-irradiation. Cell cycle arrest and apoptosis were evaluated using flow cytometry. The telomerase activity was measured using a TRAP (telomerase repeat amplification protocol) assay. Following treatment with irradiation, G
1 /S cell cycle arrest occurred in the p53+/+ cells, whereas the p53-/- cells accumulated in the G2 phase. No differences were observed in the apoptotic ratios between the two cell lines following irradiation. Decreased telomerase activity was observed in the p53+/+ cells, whereas telomerase activity was increased in the p53-/- cells. The results showed that while telomerase activity and G1 cell cycle arrest were regulated depending on the p53 status, G2 arrest and the apoptotic response were promoted via a p53-independent pathway.- Published
- 2013
- Full Text
- View/download PDF
15. Bis(μ-4-methyl-benzoato)-κ(3) O,O':O;κ(3) O:O,O'-bis-[aqua-(4-methyl-benzoato-κ(2) O,O')(nicotinamide-κN (1))cadmium].
- Author
-
Dincel O, Tercan B, Cimen E, Necefoğlu H, and Hökelek T
- Abstract
In the dinuclear centrosymmetric title compound, [Cd2(C8H7O2)4(C6H6N2O)2(H2O)2], the Cd(II) ion is chelated by two carboxyl-ate groups from 4-methyl-benzoate anions, and is further coordinated by one nicotinamide and one water mol-ecule; a carboxyl-ate O atom from an adjacent 4-methyl-benzoate anion bridges to the Cd(II) ion, completing the irregular coordination sphere of the seven ligand atoms. In the crystal, inter-molecular O-H⋯O, N-H⋯O and weak C-H⋯O hydrogen bonds link the mol-ecules into a three-dimensional network. The methyl-benzene moiety of one bridging 4-methyl-benzoate anion is disordered over two orientations of equal occupancy.
- Published
- 2012
- Full Text
- View/download PDF
16. Postoperative analgesia in orthognathic surgery patients: diclofenac sodium or paracetamol?
- Author
-
Oncül AM, Cimen E, Küçükyavuz Z, and Cambazoğlu M
- Subjects
- Acetaminophen administration & dosage, Adolescent, Adult, Analgesics, Non-Narcotic administration & dosage, Analysis of Variance, Anti-Inflammatory Agents, Non-Steroidal administration & dosage, Blood Pressure, Diclofenac administration & dosage, Double-Blind Method, Female, Heart Rate, Humans, Injections, Intramuscular, Injections, Intravenous, Male, Osteotomy adverse effects, Osteotomy, Le Fort adverse effects, Pain Measurement, Statistics, Nonparametric, Young Adult, Acetaminophen therapeutic use, Analgesics, Non-Narcotic therapeutic use, Anti-Inflammatory Agents, Non-Steroidal therapeutic use, Diclofenac therapeutic use, Orthognathic Surgical Procedures adverse effects, Pain, Postoperative drug therapy
- Abstract
Our aim was to compare the analgesic affects of paracetamol and the non-steroidal anti-inflammatory drug (NSAID) diclofenac sodium for the relief of postoperative pain in patients having bimaxillary osteotomy. Thirty patients were randomly allocated into two groups (n = 15 in each) using sealed envelopes. The first group was given paracetamol 1g intravenously and the second diclofenac sodium 75 mg intramuscularly. The analgesics were given during the last 15 min of the operation while the mucosa was being sutured. The number of requests for further analgesia, and the amount of analgesia given postoperatively (as diclofenac sodium) were recorded. The intensity of postoperative pain was recorded on a visual analogue scale (VAS), and postoperative requests for analgesia, haemodynamic variables (systolic blood pressure and heart rate), and complications were compared. The groups were comparable. A single dose of diclofenac or paracetamol effectively decreases the intensity of postoperative pain after bimaxillary osteotomy., (Copyright © 2010 The British Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.)
- Published
- 2011
- Full Text
- View/download PDF
17. Bis(isonicotinamide-κN)bis-(4-methyl-benzoato-κO)copper(II) dihydrate.
- Author
-
Hökelek T, Saka G, Tercan B, Cimen E, and Necefoğlu H
- Abstract
In the centrosymmetric title compound, [Cu(C(8)H(7)O(2))(2)(C(6)H(6)N(2)O)(2)]·2H(2)O, the Cu(II) ion is located on a crystallographic inversion center. The asymmetric unit is completed by one 4-methyl-benzoate anion, one isonicotinamide (INA) ligand and one uncoordinated water mol-ecule; all the ligands are monodentate. The two O and the two N atoms around the Cu(II) ion form a slightly distorted square-planar arrangement. The dihedral angle between the carboxyl-ate group and the attached benzene ring is 13.86 (9)°, while the pyridine and benzene rings are oriented at a dihedral angle of 86.08 (5)°. The uncoordinated water mol-ecules are linked to the INA ligands by O-H⋯O hydrogen bonds. In the crystal structure, inter-molecular O-H⋯O, N-H⋯O and C-H⋯O hydrogen bonds link the mol-ecules into a three-dimensional network.
- Published
- 2010
- Full Text
- View/download PDF
18. catena-Poly[[bis-(4-methyl-benzoato-κO:O')lead(II)]-μ-nicotinamide-κN:O].
- Author
-
Hökelek T, Dal H, Tercan B, Cimen E, and Necefoğlu H
- Abstract
In the title compound, [Pb(C(8)H(7)O(2))(2)(C(6)H(6)N(2)O)](n), the Pb(II) ion is coordinated by two 4-methyl-benzoate (PMB) and one nicotinamide (NA) ligands while symmetry-related NA ligands bridge adjacent Pb(II) ions, forming polymeric chains along the c axis. The carboxyl-ate groups in the two PMB ions are twisted away from the attached benzene ring by 22.9 (2) and 4.6 (2)°. The two benzene rings of the PMB ions are oriented at a dihedral angle of 83.7 (1)°. In a polymeric chain, the NA ligands are linked to PMB ions through intra-molecular N-H⋯O hydrogen bonds. In the crystal structure, adjacent polymeric chains inter-act via N-H⋯O and C-H⋯O hydrogen bonds, forming a two-dimensional network parallel to the bc plane.
- Published
- 2010
- Full Text
- View/download PDF
19. Bis(μ-4-methyl-benzoato-κO:O')bis-[aqua-(4-methyl-benzoato-κO,O')zinc(II)]-bis-(μ-4-methyl-benzoato-κO:O')bis-[(4-methyl-benzoato-κO)(nicotinamide-κN)zinc(II)]-water (1/1/2).
- Author
-
Hökelek T, Ermiş E, Tercan B, Cimen E, and Necefoğlu H
- Abstract
The crystal structure of the title compound, [Zn(2)(C(8)H(7)O(2))(4)(H(2)O)(2)]·[Zn(2)(C(8)H(7)O(2))(4)(C(6)H(6)N(2)O)(2)]·2H(2)O, consists of two kinds of dinuclear Zn(II) complexes (complex A and complex B) and uncoordinated water mol-ecules. In complex A, [Zn(2)(C(8)H(7)O(2))(4)(H(2)O)(2)], each Zn cation is chelated by a 4-methyl-benzoate (PMB) anion and coordinated by a water mol-ecule, and is further bridged by two PMB anions in a trigonal-bipyramidal geometry. In complex B, [Zn(2)(C(8)H(7)O(2))(4)(C(6)H(6)N(2)O)(2)], each Zn(II) cation is coordinated by a monodentate PMB anion and one nicotinamide (NA) ligand, and is further bridged by two PMB anions in a tetra-hedral geometry. Weak intra-mol-ecular π-π stacking between adjacent benzene rings is observed in complex B, the centroid-centroid distance being 3.710 (2) Å. Extensive O-H⋯O and N-H⋯O hydrogen bonding and weak C-H⋯O hydrogen bonding is present in the crystal structure. The crystal studied was a racemic twin; the minor twin component refined to 38%.
- Published
- 2010
- Full Text
- View/download PDF
20. catena-Poly[[(4-methyl-benzoato-κO)manganese(II)]-μ-aqua-bis-(μ-4-methyl-benzoato-κO:O')[(4-methyl-benzoato-κO)manganese(II)]-bis-(μ-N,N-diethyl-nicotinamide)-κN:O;O:N].
- Author
-
Hökelek T, Dal H, Tercan B, Cimen E, and Necefoğlu H
- Abstract
The asymmetric unit of the title complex, [Mn(2)(C(8)H(7)O(2))(4)(C(10)H(14)N(2)O)(2)(H(2)O)](n), contains two crystallographically independent units. In each one, the Mn(II) ions are bridged by two 4-methyl-benzoate (PMB) ligands and one water mol-ecule. In the crystal structure, each Mn(II) ion is coordinated by three PMB ligands, one water mol-ecule and two symmetry-related N,N-diethyl-nicotinamide (DENA) ligands. Symmetry-related Mn(II) ions are bridged by the N and O atoms of symmetry-related DENA ligands, forming polymeric chains parallel to [100]. The coord-ination environmnts for the Mn(II) ions are slightly distorted octa-hedral. Intra-molecular O-H⋯O hydrogen bonds link bridging water mol-ecules to the carboxyl-ate O atoms of a neigh-boring polymeric chain. In the crystal structure, π-π contacts between benzene rings [centroid-centroid distance = 3.562 (1) Å] and weak C-H⋯π inter-actions are also observed.
- Published
- 2010
- Full Text
- View/download PDF
21. Diaqua-bis(N,N-diethyl-nicotinamide-κN)bis-(4-methyl-benzoato-κO)cobalt(II).
- Author
-
Necefoğlu H, Cimen E, Tercan B, Ermiş E, and Hökelek T
- Abstract
In the centrosymmetric mononuclear title complex, [Co(C(8)H(7)O(2))(2)(C(10)H(14)N(2)O)(2)(H(2)O)(2)], the Co(II) ion is located on an inversion center. The asymmetric unit contains one 4-methyl-benzoate (PMB) anion, one N,N-diethyl-nicotinamide (DENA) ligand and one coordinated water mol-ecule. The four O atoms in the equatorial plane around the Co(II) ion form a slightly distorted square-planar arrangement, while the slightly distorted octa-hedral coordination is completed by the two pyridine N atoms of the DENA ligands in the axial positions. The dihedral angle between the carboxyl-ate group and the attached benzene ring is 3.73 (14)°, while the pyridine and benzene rings are oriented at a dihedral angle of 77.28 (6)°. In the crystal structure, inter-molecular O-H⋯O and C-H⋯O hydrogen bonds link the mol-ecules into a two-dimensional network parallel to (001). The structure is further stabilized by π-π contacts between the pyridine rings [centroid-centroid distance = 3.544 (1) Å] and weak C-H⋯π inter-actions involving the benzene ring.
- Published
- 2010
- Full Text
- View/download PDF
22. Diaqua-bis(4-methyl-benzoato-κO)bis-(nicotinamide-κN)manganese(II).
- Author
-
Necefoğlu H, Cimen E, Tercan B, Dal H, and Hökelek T
- Abstract
In the mononuclear title complex, [Mn(C(8)H(7)O(2))(2)(C(6)H(6)N(2)O)(2)(H(2)O)(2)], the Mn(II) ion is located on a crystallographic inversion center. The asymmetric unit contains one 4-methyl-benzoate anion, one nicotinamide (NA) ligand and one coordinated water mol-ecule. The four O atoms in the equatorial plane around the Mn(II) ion form a slightly distorted square-planar arrangement, while the slightly distorted octa-hedral coordination is completed by the two pyridine N atoms of the NA ligands in the axial positions. The dihedral angle between the carboxyl-ate group and the attached benzene ring is 9.01 (7)°, while the pyridine and benzene rings are oriented at a dihedral angle of 42.44 (5)°. In the crystal structure, inter-molecular O-H⋯O, N-H⋯O and C-H⋯O hydrogen bonds, and O-H⋯π and C-H⋯π inter-actions link the mol-ecules into a two-dimensional network parallel to (001).
- Published
- 2010
- Full Text
- View/download PDF
23. Tetra-kis(μ-4-methyl-benzoato-κO:O')bis-[(N,N-diethyl-nicotinamide-κN)zinc(II)].
- Author
-
Necefoğlu H, Cimen E, Tercan B, Dal H, and Hökelek T
- Abstract
In the centrosymmetric binuclear title complex, [Zn(2)(C(8)H(7)O(2))(4)(C(10)H(14)N(2)O)(2)], the Zn atoms [Zn⋯Zn' = 2.9494 (3) Å] are bridged by four 4-methyl-benzoate (PMB) anions. The four nearest O atoms around each Zn(II) ion form a distorted square-planar arrangement, the octahedral coordin-ation being completed by the pyridine N atom of the N,N-diethyl-nicotinamide (DENA) ligand. Each Zn(II) ion is displaced by 0.3530 (1) Å from the plane of the four O atoms. The dihedral angles between carboxyl-ate groups and their adjacent benzene rings are 5.88 (10) and 11.89 (9)°, while the benzene rings are oriented at a dihedral angle of 75.19 (4)°. The pyridine ring is oriented at dihedral angles of 38.28 (4) and 49.17 (4)° with respect to the benzene rings. In the crystal structure, weak inter-molecular C-H⋯O hydrogen bonds link the mol-ecules into a three-dimensional network. π-π contacts between parallel benzene rings [centroid-centroid distance = 3.8388 (8) Å] and between parallel pyridine rings [centroid-centroid distance = 3.4855 (7) Å] may further stabilize the crystal structure.
- Published
- 2010
- Full Text
- View/download PDF
24. Aqua-bis(isonicotinamide-κN)bis-(4-methyl-benzoato)-κO;κO,O'-cadmium(II) monohydrate.
- Author
-
Necefoğlu H, Cimen E, Tercan B, Süzen Y, and Hökelek T
- Abstract
In the crystal structure of the title compound, [Cd(C(8)H(7)O(2))(2)(C(6)H(6)N(2)O)(2)(H(2)O)]·H(2)O, the Cd(II) cation is coordinated by two 4-methyl-benzoate (PMB) anions, two isonicotinamide (INA) ligands and one water mol-ecule in a distorted octa-hedral CdN(2)O(4) geometry. One of PMB ions acts as a bidentate ligand while the other and the two INA are monodentate ligands. An O-H⋯O hydrogen bond links the uncoordinated water mol-ecule to the carboxyl groups of the complex. The dihedral angles between the carboxyl groups and the adjacent benzene rings are 10.28 (11) and 21.24 (9)°, while the two benzene rings and the two pyridine rings are oriented at dihedral angles of 6.90 (4) and 88.64 (4)°, respectively. In the crystal structure, O-H⋯O and N-H⋯O hydrogen bonds link the mol-ecules into a supra-molecular structure. A π-π contact between the benzene rings [centroid-centroid distance = 3.911 (1) Å] may further stabilize the crystal structure. Weak C-H⋯π inter-actions involving the pyridine rings also occur in the crystal structure.
- Published
- 2010
- Full Text
- View/download PDF
25. Tetra-kis(μ-4-methyl-benzoato-κO:O')bis-[(isonicotinamide-κN)copper(II)].
- Author
-
Necefoğlu H, Cimen E, Tercan B, Dal H, and Hökelek T
- Abstract
In the title centrosymmetric binuclear complex, [Cu(2)(C(8)H(7)O(2))(4)(C(6)H(6)N(2)O)(2)], the Cu atoms [Cu⋯Cu = 2.6375 (6) Å] are bridged by four 4-methyl-benzoate (PMB) ligands. The four nearest O atoms around each Cu(II) ion form a distorted square-planar arrangement, and the distorted square-pyramidal coordination is completed by the pyridine N atom of the isonicotinamide (INA) ligand. Each Cu(II) ion is displaced by 0.2633 (1) Å from the plane of the four O atoms, with an average Cu-O distance of 1.974 (2) Å. The dihedral angles between carboxyl-ate groups and the adjacent benzene rings are 7.88 (19) and 9.68 (10)°, while the benzene rings are oriented at a dihedral angle of 85.90 (9)°. The pyridine ring is oriented at dihedral angles of 8.59 (7) and 83.89 (9)° with respect to the benzene rings. In the crystal structure, inter-molecular N-H⋯O hydrogen bonds link the mol-ecules into a three-dimensional network. π-π contacts between the benzene rings and between the pyridine and benzene rings, [centroid-centroid distances = 3.563 (2) and 3.484 (2) Å, respectively] may further stabilize the crystal structure.
- Published
- 2010
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.