Reaction of copper(II) cysteinate with thiosemicarbazide: Crystal structure of a complex of copper(II) thiocyanate with thiosemicarbazide

Abstract

The reaction of copper(II) cysteinate with thiosemicarbazide (TSC) in water was found to yield complex of copper(II) thiocyanate of the [Cu(TSC) 2 (SCN) 2 ] composition, whose crystal structure was determined by X ray crystallography. Crystals of the complex are triclinic with a = 6.040 Å, b = 7.112 Å, c = 8.276 Å, α = 91.34°, β = 101.72°, γ = 114.83°, Z = 2, space group P . Structural units of the complex are [Cu(TSC) 2 ] 2+ centrosymmetric cations and (SCN) -anions linked by hydrogen bonds (HB), as well as by electrostatic and π-π stacking interactions. The coordination polyhedron of Cu atoms is a square completed

Synthesis and crystal structure of a copper(II) 5-sulfosalicylate complex with thiosemicarbazide

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508Our results of studying Ni(II) and Cu(II) bis(thio semicarbazide) complexes with different anions [1,2] and available literature data on the structures of anal ogous compounds [3][4][5][6][7][8][9] have revealed a considerable variety of the structures of these compounds in spite of a rather stereotypic structure of the complex cation.The [М(TSC) 2 ] 2+ cation (M = Ni(II), Cu(II)) in these compounds has a square of near square shape owing to the bidentate chelating (N,S) coordination of the TSC ligand. Sometimes, the metal coordination sphere is completed to tetragonal pyramidal or tetra gonal bipyramidal by axial atoms at elongated dis tances.

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