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Two novel complexes [Zn(L)2·(NO3)2] (1) and [Ni(L)2·2H2O]·2CH3OH·(NO3)2 (2) (L = 2‐(2‐thiazolyl)‐4‐methyl‐1,2‐dihydroquinazoline‐N3‐oxide) were synthesized successfully and characterized by elemental analysis, as well as various spectroscopic techniques. Specifically, the photoluminescence behavior of complex 1 was explored in different solvents. The structural characterization of both complexes has been determined single‐crystal X‐ray diffraction. It revealed that the metals in 1 and 2 are chelated by two L ligands in centro‐symmetrically fashion and the complexes are counterbalanced by nitrate ions which act as coordinating species in 1, while two water molecules complete the Ni coordination sphere in 2. In the crystal structures, the adjacent molecules of complex 1 disclosed a ladder‐like 2‐D network and 3‐D supramolecular self‐assembly. Simultaneously, an infinite 1‐D chain, 2‐D layered skeleton, and even meter‐shaped 3‐D network of 2 was governed by molecular interactions (H–bonds, C–H⋯π). Most strikingly, the research of antibacterial activity proved that two complexes had good activity against two standard bacteria strains. To ascertain deeply the optimum geometric configurations and detect the frontier molecular orbital energy gaps, density functional theory (DFT) calculations were also investigated. Additionally, analyses of Hirshfeld surfaces (HS) and electrostatic potential (ESP) were also performed to quantify the presence of diverse noncovalent interactions. [ABSTRACT FROM AUTHOR]

Two mono‐ and dinuclear Bi(III) complexes, [Bi(L)2(NO3)2]·NO3 (1) and [Bi2(L)2Cl8] (2) (L = (2‐(2‐pyridyl)‐4‐methyl‐1,2‐dihydroquinazoline‐N3‐oxide), were obtained via complexation of L with Bi(III) nitrate pentahydrate and Bi(III) chloride. L and both complexes were characterized by elemental analyses and spectroscopic methods including FT‐IR, UV–Vis, and fluorescence spectroscopy. Specifically, it clearly manifested that both complexes had good fluorescence emission and showed different fluorescence behaviors in diverse solvents. Both Bi(III) complexes were further determined by X‐ray crystallography, and it was found that the ratio of ligand to metal was 2:1 in 1, whereas 2 was 1:1. Their coordination geometric configurations were significantly different, such as octa‐coordinated complex 1 formed an infinite 1‐D chain‐like, funnel‐shaped 2‐D network, and ladder‐like 3‐D supramolecular framework, whereas hexa‐coordinated complex 2 with a binuclear structure exhibited two slightly distorted octahedral geometric structures; meanwhile, symmetric units came into being an infinite 2‐D layer even and meter‐shaped 3‐D supramolecular skeleton. The optimal geometries, frontier molecular orbital energies, and molecular electrostatic potential diagrams of both complexes were calculated using DFT/B3LYP. The electronic distribution of HOMO‐LUMO rationalized the results of UV–Vis spectra with the help of TD‐DFT calculations. Furthermore, all samples demonstrated excellent antibacterial activities against Escherichia coli and Staphylococcus aureus. In addition, non‐covalent interactions of complexes and their contributions were quantified with Hirshfeld surfaces using CrystalExplorer17 program. [ABSTRACT FROM AUTHOR]

Two mononuclear and dinuclear octahedral complexes, [Mn(L1)2Cl2] (1) and [Bi2(L2)2Cl8] (2) (L1 = 2‐(2‐pyridyl)‐4‐methyl‐1,2‐dihydroquinazoline‐N3‐oxide, L2 = 2‐(3‐pyridyl)‐4‐methyl‐1,2‐dihydroquinazoline‐N3‐oxide) were prepared by natural volatilization method. The ligands and both complexes were compared with spectroscopic methods, as well as characterized by elemental analysis. The photoluminescence behaviors of both complexes in different solvents were also investigated. The coordination possibility of ligands toward Mn (II)/Bi (III) was verified using X‐ray crystallography, and it revealed that the ratio of ligand to metal was 2:1 in 1, whereas 1:1 in 2. The adjacent molecules of six‐coordinated complex 1 constituted an infinite 1‐D chain, 2‐D network, and ladder‐like 3‐D supramolecular frameworks. Most strikingly, hexa‐coordinated complex 2 with dinuclear structure formed an infinite 1‐D chain, 2‐D layered and meter‐shaped 3‐D supramolecular skeleton. Density functional theory (DFT) calculation was used to optimize the geometry of complexes, compute the electrostatic potential diagrams, and evaluate the HOMO‐LUMO energy gap. The electronic transition simulated through time‐dependent (TD)‐DFT level of calculation rationalized the experimental data. The antibacterial properties of all compounds were evaluated against Gram‐positive and Gram‐negative bacterial strains. In addition, the Hirshfeld surface was utilized to quantify some hydrogen bonding interactions and their contributions. [ABSTRACT FROM AUTHOR]

Two complexes [Zn(L)2(CH3OH)2](NO3)2 (1) and [Ni(L)3]·(NO3)2 (2) (L = 2‐[2‐imidazolyl]‐4‐methyl‐1,2‐dihydroquinazoline‐N3‐oxide) were obtained successfully by means of slow evaporation solution technique (SEST) and characterized using elemental analysis, FT‐IR, UV–vis, and fluorescence spectroscopic. X‐ray diffraction revealed that the metal in complex 1 is chelated by two L ligands and two lattice methanol molecules, whereas in 2 by three L ligands, counterbalanced by nitrate ions. The crystal structures of both showed infinite 1‐D, 2‐D, and 3‐D supramolecular architecture due to intermolecular interactions. Most strikingly, Zn (II) complex showed different fluorescence properties in diverse solvents. The antimicrobial activities of all compounds were compared and showed perceptible efficiency against Gram‐negative and Gram‐positive bacteria. Electrostatic potential (ESP) calculation was used to predict the nucleophilic and electrophilic attack sites. Density functional theory (DFT) calculation results showed good agreement with experimental data, as well as the frontier molecular orbital energy gaps were detected by time‐dependent (TD)‐DFT method with HOMO–LUMO calculations. Additionally, the non‐covalent interactions of both complexes were further quantified and explored with the help of Hirshfeld surface analysis. [ABSTRACT FROM AUTHOR]

The quinazoline‐type ligand 2‐(3‐ethoxy‐2‐hydroxyphenyl)‐4‐methyl‐1,2‐dihydroquinazolin 3‐oxide (HL1, H is the deprotonatable hydrogen) was synthesized. Two mono‐ and dinuclear Cu (II) complexes, [Cu(L2)2]·2CH3OH (1), and [Cu4(L2)4(NO3)2] (2) (HL2 = 1‐(2‐{[(E)‐(3‐ethoxy‐2‐hydroxybenzylidene]amino}phenyl)ethanone oxime), were obtained via complexation of HL1 with Cu (II) acetate monohydrate or Cu (II) nitrate trihydrate in methanol. HL1 and both complexes were characterized by elemental analyses and spectroscopic methods. The structures of complexes were confirmed by single‐crystal X‐ray crystallography and the ratio of ligand to metal in 1 was 2:1 whereas 2 was 1:1. In the crystal structures, hexa‐coordinated Cu (II) complex 1 was assembled into an infinite 1‐D, 2‐D network and 3‐D supramolecular framework. Complex 2 included four deprotonated (L2)− units, four coordinated Cu (II) and two coordinated nitrate anions, forming an infinite 2‐D layer and interesting butterfly‐shaped 3‐D supramolecular skeleton. Specifically, the Cu1 and Cu4 centers were four‐coordinated, while the Cu2 and Cu3 centers were penta‐coordinated in 2. Furthermore, electrochemical properties and antibacterial activities of both complexes were also investigated. In addition, the electron paramagnetic resonance (EPR) spectra of 1 and 2 were also studied. The optimal geometries, HOMO‐LUMO energies and molecular electrostatic potential diagrams of two complexes were calculated using density functional theory (DFT)/B3LYP, and specific electronic transitions in the UV–vis spectra of 1 and 2 were recorded by time‐dependent DFT (TD‐DFT) calculations. Additionally, the noncovalent interactions between both complexes were also confirmed by Hirshfeld surfaces. [ABSTRACT FROM AUTHOR]

Two complexes [Cd(L)2(NO3)2] (1) and [Ni(L)2(OH)2][Ni(L)2(CH3OH)2](NO3)2·CH3OH (2) (L = 2‐[2‐pyridyl]‐4‐methyl‐1,2‐dihydroquinazolin 3‐oxide) were gained via complexation an amount of the new ligand L with different nitrate salts. The obtained complexes were characterized by elemental analysis, spectroscopy, and X‐ray crystallographic. In the crystal structure, centrosymmetric 1 adopted slightly distorted octahedral geometry. On the other hand, the independent unit of 2 contained two half Ni (II) complex located on a center of symmetry, differing for the axial ligand, two uncoordinated nitrate ions, and one lattice methanol molecule. Both the crystal structures formed a 3‐D supramolecular architecture through different interactions (H‐bonds, π···π, etc). X‐ray crystallography revealed that complexes 1 and 2 had 2:1 ligand‐to‐metal ratios. Most strikingly, 1 performed different fluorescence behaviors in diverse solvents, whereas 2 exhibited fluorescence quenching. When 1 was dissolution in N,N‐dimethylformamide (DMF) solvent system, it has better fluorescence properties. The geometry optimization and HOMOs and LUMOs energies of both complexes were calculated by density functional theory (DFT) methods, and the nucleophilic and electrophilic attack sites were confirmed with electrostatic potential (ESP) calculations. Preliminary investigation of antimicrobial activities of all compounds against Gram‐negative bacteria (Escherichia coli) and Gram‐positive bacteria (Bacillus subtilis) was reported. Additionally, CrystalExplorer program was used to quantify the noncovalent interactions in complexes 1 and 2 through Hirshfeld surface analysis. [ABSTRACT FROM AUTHOR]

Two complexes [Co(L)2·2CH3OH]2·(NO3)4 (1) and [Cd(L)2(NO3)2] (2) (L = 2‐(2‐imidazolyl)‐4‐methyl‐1,2‐dihydroquinazoline‐3‐oxide) were synthesized by natural evaporation of Co (II)/Cd (II) nitrate with a new heterocyclic ligand. The metal complexes are characterized by elemental analysis, spectroscopy, and X‐ray crystallographic. In the crystal structures, Co (II) complex 1 was in a six‐coordinated coordination environment and constituted an infinite 1‐D chain, 2‐D network, Meter‐shaped 3‐D supramolecular framework, while Cd (II) complex 2 assembled into an infinite 1‐D, wave‐like 2‐D, and dragonfly‐shaped 3‐D skeleton. Specifically, nitrate ions were present as a dissociated group in complex 1, whereas complex 2 was involved in the coordination. Moreover, Cd (II) complex exhibited different fluorescence behaviors in diverse solvents. Remarkably, all the compounds have shown perceptible antibacterial activity against Gram‐positive and Gram‐negative bacteria. Furthermore, the electrostatic potential (ESP) calculations were utilized to analyze electrophilic and nucleophilic attack sites on the molecule, which verified the existence of hydrogen bonds in the optimized crystal structure. In addition, the structural features of metal complexes have been remarkably rationalized, and the overall trends obtained in the experimental values have been resoundingly remade by TD/DFT calculations. The detailed Hirshfeld surface analysis and fingerprint plots yielded a comparative picture of the mode of non‐covalent interactions. [ABSTRACT FROM AUTHOR]

The quinazoline‐type ligand 2‐(4‐diethylamino‐2‐hydroxyphenyl)‐4‐methyl‐1,2‐dihydroquinazoline 3‐oxide (HL1; H is the deprotonatable hydrogen) was prepared. Two 2‐D supramolecular complexes [Cu2(L2)2(NO3)2] (1) and [Ni2(L2)2(CH3COO)2] (2) (L2 = 1‐(2‐{[(E)‐(4‐diethylamino‐2‐hydroxybenzylidene]amino} phenyl)ethanone oxime) were synthesized using HL1 and characterized by elemental analysis, spectroscopic methods, and single‐crystal X‐ray diffraction studies. It revealed that 1 had coordinated two nitrate ions whereas 2 had acetate ions. In the crystal structures, six‐coordinated Cu (II) complex 1 formed an infinite 2‐D and X‐shaped 3‐D supramolecular frameworks. Simultaneously, Ni (II) complex 2 assembled into wavy 2‐D networks. Furthermore, electrochemical properties and antimicrobial activities of all compounds were as well investigated. Afterwards, the electrophilic and nucleophilic attack sites identified by electrostatic potential (ESP) calculations confirmed that hydrogen bonds were observed in the optimized structure of the crystal, and the closest contact between the active atoms of both complexes was confirmed through Hirshfeld surface analysis and time‐dependent density functional theory (TD‐DFT) calculations. [ABSTRACT FROM AUTHOR]

The quinazoline-type ligand 2-(4-methoxy-2-hydroxyphenyl)-4-methyl-1,2-dihydroquinazolin 3-oxide (HL1, H is the deprotonatable hydrogen) was synthesized. [Cu(L2)]·CH3OH (1), [Ni(L2)2] (2), and [Co(L2)2](NO3) (3) (HL2 = 1-(2-{[(E)-(4-methoxy-2-hydroxybenzylidene]amino}phenyl)ethanone oxime) were obtained by reaction of an amount of HL1 with different metal salts in methanol. All of the synthesized compounds were characterized by elemental analyses and spectroscopic methods. The structures of the complexes were confirmed by single-crystal X-ray crystallography and was revealed that 1 had 1 : 1 whereas 2 and 3 had 2 : 1 ligand-to-metal ratios. In the crystal structures, penta-coordinated Cu(ii) complex 1 formed an infinite 1-D, 2-D and 3-D supramolecular structure; hexa-coordinated Ni(ii) complex 2 possessed interesting W-shaped 2-D network and even X-shaped 3-D layer skeleton; six-coordinated Co(iii) complex 3 had one free nitrate anion and assembled into 2-D and 3-D supramolecular frameworks. Furthermore, the antimicrobial activities of all compounds were tested. Density functional theory (DFT) calculations were executed to ascertain the optimum geometry structures of all complexes. The noncovalent interactions among three complexes were quantified with Hirshfeld surfaces using CrystalExplorer. [ABSTRACT FROM AUTHOR]

Two two‐dimensional supramolecular Nickel(II) and Cobalt(III) complexes, [Ni(L2)2]·2CH3OH (1) and [2Co(L2)2] (2) (HL2 = 1‐(2‐{[(E)‐3‐bromo‐5‐chloro‐2‐hydroxybenzylidene]amino}phenyl)ethanone oxime), were synthesized via complexation of salts acetate with HL1 (2‐(3‐bromo‐5‐chloro‐2‐hydroxyphenyl)‐4‐methyl‐1,2‐dihydroquinazoline 3‐oxide, H is the deprotonatable hydrogen). During the reaction, the C–N bond in HL1 is converted into the C=N–OH group in HL2. The spectroscopic data of both complexes were compared with the ligand HL1. HL1 and both complexes were determined by single‐crystal X‐ray crystallography. The differently geometric features of the obtained complexes 1 and 2 are observed. In the crystal structure, 1 and 2 form an infinite 1‐D chain‐like and 2‐D supramolecular frameworks. EPR spectroscopy of 2 was investigated. Moreover, electrochemical properties and antimicrobial activities of both complexes were also studied. In addition, the calculated HOMO and LUMO energies show the character of HL1, complexes 1 and 2. The electronic transitions and spectral features of HL1 and both complexes were discussed by TD‐DFT calculations. [ABSTRACT FROM AUTHOR]

Two two-dimensional supramolecular copper(II) and cobalt(III) complexes, Cu(L1)2 ( 1; HL1 = 2-hydroxy-3-methoxybenzaldehyde oxime) and [Co(L2)2]2⋅2CH3COOCH2CH3 ( 2; HL2 = 1-(2-{[( E)-3-methoxy-2-hydroxybenzylidene]amino}phenyl)ethanone oxime), have been synthesized via complexation of Cu(II) nitrate trihydrate and Co(II) acetate tetrahydrate with HL. A plausible reaction mechanism for the formation of HL1 is proposed. HL was synthesized and characterized using infrared, 1H NMR and 13C NMR spectra, as well as elemental analysis. Complexes 1 and 2 were investigated using single-crystal X-ray diffraction and have a 2:1 ligand-to-metal ratio. Different geometric features of both complexes are observed. In their crystal structures, 1 and 2 form infinite two-dimensional structures and 2 forms a three-dimensional supramolecular framework. Electron paramagnetic resonance spectra of 1 and 2 were also investigated. Moreover, thermal and electrochemical properties and antimicrobial activity of 2 were also studied. In addition, the calculated HOMO and LUMO energies show the character of complex 1. [ABSTRACT FROM AUTHOR]

Two new cobalt(II) complexes, [Co(L3)2]·CH3OH·CH3COCH3(1) (HL3= 1-(2-{[(E)-3,5-dichloro-2-hydroxybenzylidene]amino}phenyl)ethanone oxime) and Co(L4)2(2) (HL4= 1-(2-{[(E)-3,5-dibromo-2-hydroxybenzylidene]amino}phenyl)ethanone oxime), have been synthesized via complexation of Co(II) acetate tetrahydrate withHL1andHL2.HL1,HL2,and their corresponding Co(II) complexes were characterized by IR,1H NMR spectra, as well as by elemental analysis and UV–Vis spectroscopy, respectively. The crystal structures of the complexes have been determined by single-crystal X-ray diffraction.1and2display that extensive hydrogen bonds and C–X···πbonding interactions construct the 1-D infinite chain [Co(L3)2]·CH3OH·CH3COCH3and Co(L4)2into 2-D supramolecular frameworks. The electrochemical properties of two Co(II) complexes were also investigated by cyclic voltammetry. Two new cobalt(II) complexes have been synthesized via complexation of Co(II) acetate tetrahydrate withHL1andHL2originally.HL1,HL2and their corresponding Co(II) complexes were characterized by IR,1H NMR spectra, as well as by elemental analysis and UV–Vis spectroscopy, respectively. The crystal structures of the complexes have been determined by single-crystal X-ray diffraction.1and2display that extensive hydrogen bonds and C-X···π bonding interactions construct the 1-D infinite chain [Co(L3)2]·CH3OH·CH3COCH3and Co(L4)2into 2-D supramolecular frameworks. The electrochemical properties of two Co(II) complexes were also investigated by cyclic voltammetry. [ABSTRACT FROM AUTHOR]

An unexpected mononuclear Ni(II) complex, [Ni(L2)2]·CH3OH (HL2 = 1-(2-{[(E)-3,5-dichloro-2-hydroxybenzylidene]amino}phenyl)ethanone oxime), has been synthesized via complexation of Ni(II) acetate tetrahydrate with HL1. HL1and its corresponding Ni(II) complex were characterized by IR,1H-NMR spectra, HRMS, as well as by elemental analysis, UV–vis, and emission spectroscopy. The crystal structure of the complex has been determined by single-crystal X-ray diffraction. Each complex links two other molecules into an infinite 1-D chain via intermolecular hydrogen bonds. Moreover, the electrochemical properties of the nickel complex were studied by cyclic voltammetry. Superoxide dismutase-like activities of HL1and Ni(II) complex were also investigated. [ABSTRACT FROM PUBLISHER]

An unexpected dinuclear Cu(II) complex, [Cu2(L2)2] (H2L2 = 3-methoxysalicylaldehyde O-(2-hydroxyethyl)oxime), has been synthesized via complexation of Cu(II) acetate monohydrate with H4L1. Catalysis by Cu(II) results in unexpected cleavage of two N–O bonds in H4L1, giving a dialkoxo-bridged dinuclear Cu(II) complex possessing a Cu–O–Cu–O four-membered ring core instead of the usual bis(salen)-type tetraoxime Cu3–N4O4 complex. Every complex links six other molecules into an infinite-layered supramolecular structure via 12 intermolecular C–H ··· O hydrogen bonds. Furthermore, Cu(II) complex exhibits purple emission with maximum emission wavelength λmax = 417 nm when excited with 312 nm. [ABSTRACT FROM PUBLISHER]

A tetranuclear Zn(ΙΙ) complex, [Zn4L2(OAc)2(CH3OH)2] with an unsymmetric Salen-type bisoxime (H3L = 6-hydroxy-4′,6′-dibromo-2,2′-[ethylenediyldioxybis(nitrilomethylidyne)]diphenol), has been synthesized and structurally characterized. There are two kinds of coordination geometry (trigonal bipyramidal and square pyramidal) in the Zn(ΙΙ) complex. The molecule has serious distortion probably from the asymmetry. The complex exhibits blue emission with the maximum emission wavelength λ max = 423 nm when excited with 340 nm. [ABSTRACT FROM PUBLISHER]

A series of 2-benzofuryl substituted unsymmetrical ureas were synthesized by reactions of benzofuroyl isocyanate, which was prepared from benzofuroyl azide by Curtius rearrangement, with various aromatic amines, 2-amino-5-(benzo-2-furyl)-1,3,4-thiadiazole, and 2-amino-5-aryloxymethylene-1,3, 4-thiadiazoles under microwave irradiation. Compared to conventional methods, this synthesis has the advantages of mild reaction conditions, easy handling, and high yields. The products have been characterized by analytical and spectral (IR and 1H NMR) data. [ABSTRACT FROM AUTHOR]

Tri-nuclear cobalt and nickel complexes ([(CoL)2(OAc)2Co] · THF (I) and [(NiL)2(OAc)2(THF)2Ni] · THF (II)) have been synthesized by reaction of a new Salen-type bisoxime chelating ligand of 2,2'-[ethylenedioxybis(nitrilomethylidyne)]dinaphthol(H2L) with cobalt(II) acetate tetrahydrate or nickel(II) acetate tetrahydrate, respectively. Complexes I and II were characterized by elemental analyses, IR, TG-DTA and 1H-NMR etc. The X-ray crystal structures of I and II reveal that two acetate ions coordinate to three cobalt or nickel ions through M-O-C-O-M (M = Co or Ni) bridges and four μ-naphthoxo oxygen atoms from two [ML] units also coordinate to cobalt(II) or nickel(II). Complex I has two distorted square-pyramidal coordination spheres and an octahedral geometry around Co1. In complex II all three nickel ions are six-coordinate. [ABSTRACT FROM AUTHOR]

A series of asymmetric semicarbazides was synthesized by reactions of 2-benzofuran isocyanate, which was prepared by Curtius rearrangement from 2-benzofuroyl azide with acid hydrazide under microwave irradiation using a one-pot procedure. Comparing to the conventional method, this method has the advantages of mild conditions, easy handling, and high yield. [ABSTRACT FROM AUTHOR]

A series of styryl substituted semicarbazides were synthesised by reaction of trans-styryl isocyanate, prepared by Curtius rearrangement of cinnamoyl azide, with acid hydrazides under microwave irradiation using a one-pot procedure. The effects of microwave irradiation in promoting the condensation of trans-styryl isocyanate with hydrazides were investigated alongside a conventional heating method (oil bath at 120 °C). When compared with classical methods, microwave irradiation has the advantages of mild conditions, easy handling, and high yields. The products have been characterised by analytical and spectral (IR and 1H NMR) data. [ABSTRACT FROM AUTHOR]

A series of asymmetric semicarbazides were synthesised using 3-coumarin isocyanate, which was prepared from 3-coumarinyl azide by Curtius rearrangement, with acid hydrazides under microwave irradiation using a one-pot procedure. This method has the advantages of mild conditions, easy handling and high yields. The products, which have been characterised by analytical and spectral data, have many medicinal and agrochemical applications. [ABSTRACT FROM AUTHOR]

Two two‐dimensional and three‐dimensional supramolecular complexes [M (L)2] (NO3)2·2CH3OH (M = Cu(1) and Co(2), L = 2‐(4‐imidazolyl)‐4‐methyl‐1,2‐quinazoline‐N3‐oxide), were synthesized and characterized by FT‐IR and UV–Vis spectroscopy, as well as elemental analysis. The spectroscopic data of both complexes were compared with the ligand L. Both complexes were determined by X‐ray single‐crystal diffraction and display similar coordination geometry and have a 2:1 ligand‐to‐metal ratio. All the central M (II) atoms are hexa‐coordinated with perfect octahedral geometries. In the crystal structures, complexes 1 and 2 form an infinite 1‐D chain‐like and 2‐D, 3‐D supramolecular frameworks. X‐ray photoelectron spectrum (XPS) and thermal stability of 2 was investigated. Moreover, electrochemical properties and antimicrobial activities of both complexes were also studied. Two 2‐D and 3‐D supramolecular complexes [M(L)2] (NO3)2•2CH3OH (M = Cu(1) and Co(2), L = 2‐(4‐imidazolyl)‐4‐methyl‐1,2‐quinazoline‐N3‐oxide), were synthesized and characterized. The spectroscopic data of complexes were compared with L. Both complexes were determined by X‐ray single‐crysta diffraction and display perfect octahedral geometries. In the crystal structures, complexes 1 and 2 form an infinite 1‐D chain‐like and 2‐D, 3‐D supramolecular frameworks. XPS and thermal stability of 2 was investigated. Electrochemical properties and antimicrobial activities of complexes were also studied. [ABSTRACT FROM AUTHOR]

The synthesis of the title semicarbazides (IV) and (VI) (16 examples in all) is accomplished employing the Curtius rearrangement of cinnamoyl azide (I) followed by nucleophile addition of hydrazides to the NCO moiety under microwave conditions. [ABSTRACT FROM AUTHOR]

The article presents information on crystal structure and fluorescence behavior of bisoxazole.