Syntheses and crystal structures of copper(I) complexes with alkyl-thioallophanate derivatives

Article abstract of DOI:10.1016/s0277-5387(96)00609-2

The reaction of CuCl₂ · 2H₂O with N-(p-nitrophenyl)-N′-butoxycarbonyl)-thiourea (H₂nbt) and N-(o-nitrophenyl)-N′-(ethoxycarbonyl)-thiourea (H₂net) gave two copper(I) complexes, [Cu(H₂nbt)₂Cl]₂, 1, and Cu(H₂net)₂Cl, 2, respectively. In complex 1, the ligand H₂nbt is S,S-bonded to two Cu atoms, and the two ligand molecules exchange long Cu - S interactions (Cu -S = 2.700 A?) forming a dimer, in which the Cu atom has a distorted tetrahedral coordination [Cl - Cu - S(1) = 119.9(1), Cl - Cu - S(2) = 122.9(1) and S(1) - Cu - S(2) = 108.4(1)°] and is 0.387(2) A? from th basal S, S, Cl with unequal Cu - S [2.253(3), 2.244(3) A?] and Cu - Cl [2.247(3) A?] bonds. In complex 2, the copper (I) atom is in a trigonal planar geometry [Cl - Cu - S(1) = 120.53(5), Cl - Cu - S(2) = 118.43(5) and S(1) - Cu -S(2) = 119.16(5)°] with two unequal Cu - S [2.228(1), 2.232(1) A?] and Cu - Cl [2.251(1) A?] bonds.