Reaction of Copper(II) Cysteinate with Thiosemicarbazide: Crystal Structure of a Complex of Copper(II) Thiocyanate with Thiosemicarbazide

摘要

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 A, b = 7.112 A, c = 8.276 A, α = 91.34°, β = 101.72°, γ = 114.83°, Z= 2, space group P1-bar. 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 to bipyramid; the bonds Cu(1)-N(3), Cu(1)-S(1), and Cu(1)-S(2) are 2.002 A, 2.303 A, and 3.015 A, respectively.