SYNTHESES AND CRYSTAL-STRUCTURES OF COPPER(I) COMPLEXES WITH ALKYL-THIOALLOPHANATE DERIVATIVES

The reaction of CuCl2 . 2H(2)O with N-(p-nitrophenyl)-N'-butoxycarbony l)-thiourea (H(2)nbt) and N-(o-nitrophenyl)-N'-(ethoxycarbonyl)-thiour ea (H(2)net) gave two copper(I) complexes, [Cu(H(2)nbt)(2)Cl](2), 1, a nd Cu(H(2)net)(2)Cl, 2, respectively. In complex 1, the ligand H(2)nbt is S,S-bonded to two Cu atoms, and the two ligand molecules exchange ''long'' Cu--S interactions (Cu--S = 2.700 Angstrom) 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 )degrees] and is 0.387(2) Angstrom, from th basal S, S, Cl with unequa l Cu--S [2.253(3), 2.244(3) Angstrom] and Cu--Cl [2.247(3) Angstrom] b onds. In complex 2, the copper (I) atom is in a trigonal planar geomet ry [Cl--Cu--S(1) = 120.53(5), Cl--Cu--S(2) = 118.43(5) and S(1)--Cu--S (2) = 119.16(5)degrees] with two unequal Cu--S [2.228(1), 2.232(1) Ang strom] and Cu--Cl [2.251(1) Angstrom] bonds. (C) 1997 Elsvier Science Ltd.