Tóm tắt
Abstract
The crystal and molecular structures of four colorless Cd(S2CNR2)2 compounds have been determined. The crystals of Cd(S2CNiPr2)2, C14H28CdN2S4, (determined at 293 K) are monoclinic, space group P21/n with unit cell dimensions a = 11.611(5) Å, b = 11.228(9) Å, c = 16.767(2) Å, β = 108.90(2)°, Z = 4 and D
x = 1.494 Mg m−3. Crystals of Cd(S2CN(Et)Cy)2, C18H32CdN2S4, (200 K) are monoclinic, space group P21/c with unit cell dimensions a = 8.541(4) Å, b = 19.688(8) Å, c = 13.847(3) Å, β = 94.29(3)°, Z = 4 and D
x = 1.479 Mg m−3. Crystals of Cd(S2CNCy2)2 as a 1/1 CH2Cl2 solvate, C27H46CdCl2N2S4, (293 K) are triclinic, space group P[unk] with unit cell dimensions a = 13.557(7) Å, b = 14.49(2) Å, c = 9.604(2) Å, α = 100.70(6)°, β = 91.55(3)°, γ = 115.58(6)°, Z = 2 and D
x = 1.421 Mg m−3. Crystals of Cd(S2CNiBu2)2, C18H36CdN2S4, (293 K) are monoclinic, space group C2/c with unit cell dimensions a = 49.97(5) Å, b = 9.597(3) Å, c = 23.675(8) Å, β = 116.41(3)°, Z = 16 and D
x = 1.361 Mg m−3. The structures were solved by direct methods and each refined by a full-matrix least-squares procedure to final R = 0.059 using 3485 reflections for Cd(S2CNiPr2)2; to R = 0.055 using 2849 reflections for Cd(S2CN(Et)Cy)2; to R = 0.079 using 3069 reflections for Cd(S2CNCy2)2; and to final R = 0.060 for 4851 reflections for Cd(S2CNiBu2)2. The Cd(S2CNR2)2 structures adopt a common dimeric motif in the solid state consistent with that observed for related systems. In the centrosymmetric dimeric unit, each cadmium atom is chelated by two dithiocarbamate ligands, one of which forms quite disparate Cd–S distances owing to a bridge formed to the second cadmium atom. The coordination geometries are distorted trigonal bipyramidal.
