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Herein we report the synthesis and characterization of a new copper(I) complex with triphenylphosphine (PPh3) and N‐(2‐thiophenecarbonyl)‐N'‐(3‐Cl, 4‐F‐phenyl)thiourea (HL), as ligands. The complex was characterized by vibrational (FTIR and FT‐Raman) and multinuclear (1H, 13C {1H}, 31P{1H}) NMR spectroscopies. The crystalline structure of the complex was determined by single‐crystal X‐ray diffraction, confirming that a neutral binuclear compound, identified as [Cu(PPh3)(L‐κ2‐N,μ‐S)]2, was obtained. The anionic thiourea ligand coordinates to the metal through the sulfur and nitrogen atoms in an unusual bidentate κ2‐N,μ‐S coordination mode. The complex is a dimer sited on a crystallographic center of symmetry. Each Cu2(μ‐S)2 cation bridges trough the sulfur atoms of two symmetry related thiourea moieties and is also coordinated to the nitrogen atom of the thiourea ligand and the phosphorus atom from PPh3 co‐ligand, forming a slightly distorted tetrahedral geometry. An intramolecular N−H⋅⋅⋅O=C hydrogen bond is observed in the anionic ligand, forming a six‐membered ring that stabilizes the N−H thioamide group. Hirshfeld surface analysis shows that the molecules are connected by weak intermolecular contacts C⋅⋅⋅C, H⋅⋅⋅C and H⋅⋅⋅H which add to the stability of the crystalline packing. The in vitro cytotoxicity study of the complex indicates that it is more active against human lung carcinoma cells (A549), when compared to the free ligand. [ABSTRACT FROM AUTHOR]

A novel mixed platinum(II) complex with general formula [Pt(PPh3)2(L1‐O,S)]PF6 has been synthetized and characterized by elemental analysis, molar conductivity, and by IR and NMR (1H, 13C and 31P) spectroscopic methods. The crystal structure has been determined by single‐crystal X‐ray crystallography. The molecule presents an almost ideal square‐planar geometry, and the crystal is stabilized by weak C–H···O and C–H···F hydrogen bonds, and C–H···π stacking interactions. The steric congestion of ligands is described by "exact" cone and solid cone angles, and the percentage of metal surface shielded by the ligands. The results are compared to closely related palladium complexes. The X‐ray structure revealed the proximity of the ortho phenyl proton of one PPh3 ligand to platinum(II) showing rare intramolecular C–H···Pt anagostic binding interaction. The title complex was determined to be active against tumor cells, and it also showed a moderate inhibitory action against mycobacterium tuberculosis. [ABSTRACT FROM AUTHOR]

Three new homodinuclear complexes containing substituted phenolate-type ligands based on the N5O2 donor (2-(N,N-Bis(2-pyridylmethyl)aminomethyl)-6-(N′,N′-(2-hydroxybenzyl)(2-pyridylmethyl))aminomethyl)-4-methylphenol (H2L-H) were synthesized and characterized by X-ray crystallography. Potentiometric titration studies in 70% (v/v) aqueous ethanol show that all three complexes exhibit a common {CuII(µ-phenoxo)(µ-OH)CuII(OH)} core in solution. Kinetic studies on the oxidation reaction of 3,5-di-tert-butylcatechol revealed that the catalytic activity of the metal complexes increases toward the ligand containing an electron-donating group. In addition, these complexes also carried out DNA cleavage by hydrolytic and oxidative pathways. Copyright © 2010 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]

α-diamines, such as ethylendiamine and o-phenylendiamine, add to 3,4-aryl-disubstituted 1,2,5-thiadiazole 1,1-dioxides to give dihydropyrazines or quinoxalines, respectively and sulfamide. The new compound acenaphtho [5,6-b]-2,3-dihydropyrazine was synthesized and characterized. The addition of ethylendiamine to 3,4-diphenyl- 1,2,5-thiadiazoline 1,1-dioxide gives 3,4-disubstituted thiadiazolidine 1,1-dioxide, dihydropyrazines, or pyrazines, depending on the reaction condition used. The reactions were followed by cyclic voltammetry and NMR spectroscopy which, in some cases, allowed the detection of the thiadiazolidine intermediate. Copyright © 2008 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]

The crystal structure of the title compound, [Hg(C11H8N)(C12H22PS2)], consists of mol­ecules in which the Hg atom is coordinated strongly to the C atom in position 2 of the phenyl group and to one of the di­thio­phosphinate S atoms, and at longer distances to the pyridine N atom and the other S atom. The C-Hg-S fragment involving the S atom more strongly bound to Hg is almost linear [C-Hg-S = 178.9 (3)°]. [ABSTRACT FROM AUTHOR]

The title compound, tetrakis(μ-3,4,5-triethoxy­benzoato-κ2 O: O′)­bis­[(pyrazine-κ N)­rhodium(II)]( Rh-Rh), [Rh2(C13H17O5)4(C4H4N2)2], crystallizes on an inversion centre in the triclinic space group . The equatorial carboxyl­ate ligands bridge the two RhII atoms, giving a binuclear lantern-like structure. The pyrazine mol­ecules occupy the two axial coordination sites. The phenyl rings are tilted by ca 10° with respect to the attached carboxyl­ate groups. The pyrazine planes have a torsion angle of ca 19° around the Rh-N bond with respect to the plane of the nearer carboxyl­ate group and are not coplanar with the Rh-Rh bond. [ABSTRACT FROM AUTHOR]

The crystal structures of two salts of bis­(thio­urea)­gold(I) complexes, namely bis­(thio­urea-κ S)­gold(I) chloride, [Au(CH4N2S)2]Cl, (I), and bis­[bis­(thio­urea-κ S)­gold(I)] sulfate, [Au(CH4N2S)2]2SO4, (II), have been determined. The chloride salt, (I), is isomorphous with the corresponding bromide salt, although there are differences in the bonding. The AuI ion is located on an inversion centre and coordinated by two symmetry-related thio­urea ligands through the lone pairs on their S atoms [Au-S 2.278 (2) Å and Au-S-C 105.3 (2)°]. The sulfate salt, (II), crystallizes with four independent [Au(CH4N2S)2]+ cations per asymmetric unit, all with nearly linear S-Au-S bonding. The cations in (II) have similar conformations to that found for (I). The Au-S distances range from 2.276 (3) to 2.287 (3) Å and the Au-S-C angles from 173.5 (1) to 177.7 (1)°. These data are relevant in interpreting different electrochemical processes where gold-thio­urea species are formed. [ABSTRACT FROM AUTHOR]

The octahedral title compound, [Ru(C2H5O)(NO)(NO2)2(C6H16N2)], crystallizes in the rhombohedral space group P31 with an ethoxy ligand axially coordinated trans to the nitro­syl ligand. The RuII ion is equatorially coordinated by a tetramethylethylenediamine group acting as a bidentate ligand, and to two nitro moieties whose planes are tilted with respect to the mean equatorial plane. Each nitro­gen ligand bonded to the metallic centre has a different hybridization state. [ABSTRACT FROM AUTHOR]

The title compound, catena-poly[[tetrakis(μ-decanoato-κ2 O: O′)diruthenium(II,III)( Ru- Ru)]-μ-octanesulfonato-κ2 O: O′], [Ru2(C10H19O2)4(C8H17O3S)], is an octane­sulfonate derivative of the mixed-valence complex diruthenium tetradecanoate. The equatorial carboxyl­ate ligands are bidentate, bridging two Ru atoms to form a dinuclear structure. Each of the two independent dinuclear metal complexes in the asymmetric unit is located at an inversion centre. The octane­sulfonate anion bridges the two dinuclear units through axial coordination. The alkyl chains of the carboxyl­ate and sulfonate ligands are arranged in a parallel manner. The global structure can be seen as infinite chains of polar moieties separated by a double layer of non-polar alkyl groups, without interdigitation of the alkyl chains. [ABSTRACT FROM AUTHOR]

The octahedral title compound, [Ru(C(2)H(5)O)(NO)(NO(2))(2)(C(6)H(16)N(2))], crystallizes in the rhombohedral space group P3(1) with an ethoxy ligand axially coordinated trans to the nitrosyl ligand. The RuII ion is equatorially coordinated by a tetramethylethylenediamine group acting as a bidentate ligand, and to two nitro moieties whose planes are tilted with respect to the mean equatorial plane. Each nitrogen ligand bonded to the metallic centre has a different hybridization state.