Crystal Structures and Characterizations of Bis (pyrrolidinedithiocarbamato) Cu(II) and Zn(II) Complexes

The structures of [Cu (S 2 CN (CH 2 ) 4 ) 2 ] (1) and [Zn 2 (S 2 CN‐(CH 2 ) 4 ) 4 ] (2) have been determined by X‐ray crystallography analysis. They are all isomorphous and triclinic, space group of P 1 − , with Z = 1. The lattice parameters of compound 1 is: a = 0.63483(2) nm, b = 0.74972(3) nm, c =0.78390(1) mn, α = 75.912(2)°, β = 78.634(2)° and γ = 86.845(2)°; compound 2: a = 0.78707(6) nm, b =0.79823(6) nm, c = 1.23246(9) nm, α = 74.813(2)°, β = 73.048(2)° and γ = 88.036(2)°. The copper atom is located on a crystallographic inversion center and zinc atom lies across centers of symmetry. The Cu(II) ion has a square‐planar geometry while Zn(II) has a distorted tetrahedral geometry. The thermal gravity (TG) data indicate that no structural transitions in the two compounds were abserved and the decomposition products can adsorb gas. Also they all have a high thermal stability.