Bis{μ-2-[bis­(pyridin-2-yl)methyl­idene]hydrazinecarbothio­amidato}bis­[bromido­copper(II)] methanol disolvate

In the centrosymmetric binuclear title compound, [Cu2Br2(C12H10N5S)2]·2CH3OH, the CuII ion adopts a slightly dis­torted square-pyramidal coordination geometry. The hydrazine carbothio­amide moiety and one of the pyridyl rings together adopt an almost planar arrangement, with a maximum deviation of 0.052 (4) Å for the C atom of the thio­urea moiety. There are two mol­ecules of methanol solvent per complex in the asymmetric unit. The nonconventional intra­molecular C—H⋯Br hydrogen bonds make the mol­ecule more rigid, whereas the conventional N—H⋯N and O—H⋯Br inter­molecular hydrogen-bonding inter­actions, supported with N—H⋯π inter­actions, establish a supra­molecular linkage among the mol­ecules in the crystal. An intermolecular C—H⋯O inter­action is also present

The ligating versatility of halides and pseudohalides in copper(II) complexes- monomers, dimers and chains”

The work embodied in this thesis was carried out by the author in the Department of Applied Chemistry, CUSAT, Kochi, during the period 2008-2013. The thesis brings to light, our attempts to evaluate the coordination behavior of some compounds of interest. The biological activities of semicarbazones and their metal complexes have been an active area of research during the past years because of their significant role in naturally occurring biological systems. Tridentate NNO and ONO semicarbazone systems formed from heterocyclic and aromatic carbonyl compounds and their transition metal complexes are well-authenticated compounds in this field and their synthesis, crystal structures and spectral studies are well desirable. Hence, we decided to develop a research program aimed at the syntheses, crystal structures and spectral studies of copper complexes with halides and pseudohalides. In addition to single crystal X-ray diffraction studies, various physico-chemical methods of analysis were also used for the characterization of the complexesCochin University Of Science And TechnologyDepartment Of Applied Chemistry Cochin University Of Science And Technolog

Dichlorido(1-{(E)-[phenyl(pyridin-2-yl-κN)methylidene]amino-κN}pyrrolidin-2-one-κO)copper(II) monohydrate

The CuII atom in the title compound, [CuCl2(C16H15N3O)]·H2O, is N,N′,O-chelated by the neutral Schiff base ligand and exists in a square-pyramidal geometry. It is displaced by 0.316 (1) Å out of the square plane (r.m.s. deviation = 0.015 Å) in the direction of the apical Cl atom. The apical Cl atoms of adjacent complex units are hydrogen-bond acceptors to two water molecules, the interaction generating a centrosymmetric dimer through a cyclic R42(8) association

(Cyanato-κN){1-[(E)-phenyl(pyridin-2-yl-κN)methylidene]semicarbazidato-κ2N1,O}copper(II)

The CuII atom in the title compound, [Cu(C13H11N4O)(NCO)], is N,N′,O-chelated by the mono-deprotonated Schiff base ligand and it is also covalently bonded to the nitrogen end of the cyanate ion. The CuII atom shows a square-planar coordination that is distorted towards square-pyramidal owing to an intermolecular Cu...Ncyanate interaction [2.623 (2) Å], which gives a centrosymmetric dimer. In the square-planar description, the CuII atom is displaced out of the square plane [r.m.s. deviation = 0.048 Å] by 0.084 (1) Å in the direction of the apical occupant. In the crystal, adjacent complex dimers are linked by an amine N—H...N hydrogen-bond pair, also giving a centrosymmetric cyclic association [graph set R22(8)], generating a linear chain parallel to [110]

catena-Poly[[[{1-[(E)-phenyl(pyridin-2-yl-κN)methylidene]semicarbazidato-κ2N1,O}copper(II)]-μ-dicyanamido-κ2N1:N5] monohydrate]

The CuII atoms in the title coordination polymer, {[Cu(C13H11N4O)(C2N3)]·H2O}n, are N,N′,O-chelated by the deprotonated Schiff base ligands, and adjacent metal atoms are bridged by the dicyanamide ions, generating a polymeric chain that propagates along the b axis. The two independent metal atoms show a square-pyramidal N4O coordination. The two independent water molecules are disordered over two positions; each water molecule is a hydrogen-bond donor to a carbonyl O atom. Weak N—H...N hydrogen bonding is also observed

Di-μ-azido-κ4N1:N1′-bis({1-[(E)-phenyl(pyridin-2-yl-κN)methylidene]thiosemicarbazidato-κ2N1,S}copper(II))

In the title compound, [Cu2(C13H11N4S)2(N3)2], the CuII cation is N,N′,S-chelated by the deprotonated Schiff base ligand and is coordinated by the azide anion, while an N atom from an adjacent azide anion bridges the CuII cation at the apical position with a longer Cu—N distance of 2.533 (3) Å, completing the distorted N4S square-pyramidal coordination geometry. A pair of azide anions bridge the two CuII cations, forming a centrosymmetric binuclear molecule. In the crystal, the binuclear molecules are linked by an N—H...N hydrogen bond into a ribbon running along the a axis

{2-[(2-Carbamoylhydrazin-1-ylidene)methyl-κ2N1,O]-5-methoxyphenolato-κO1}chloridocopper(II)

The asymmetric unit of the title compound, [Cu(C9H10N3O3)Cl], contains two independent molecules with similar structures. The CuII cation is N,O,O′-chelated by the deprotonated Schiff base ligand and is further coordinated by a Cl− anion in a distorted ClNO2 square-planar geometry. In the crystal, adjacent molecules are linked by N—H...O and N—H...Cl hydrogen bonds, forming a two-dimensional network parallel to [100]