Crystal and molecular structures of Ni(II), Pd(II) and Pt(II) complexes of methyl-2-amino-1-cyclopentenedithiocarboxylate

Abstract

Nickel(II), palladium(II) and platinum(II) complexes of methyl-2-amino-1-cyclopentenedithiocarboxylate have been synthesized and characterized crystallographically in a continued effort to examine the coordination chemistry of N 2S 2 ligand systems. The Ni(II) complex crystallizes in the tetragonal space group P4 2/n with a = 18.095(5), c = 5.266(3) Å, V = 1724(1) Å 3 and Z = 4. Both palladium(II) and platinum(II) compounds crystallize with a water molecule weakly bound to the two imine hydrogens of each complex, mandating formation of the cis-planar isomer. Pd(C 7H 10NS 2) 2 crystallizes in the triclinic centrosymmetric space group P 1 with a = 7.805(3), b = 9.923(4), c = 12.769(4) Å, α = 107.62(3), β = 101.74(3), γ = 92.46(3)°, V = 917.1(6) Å 3 and Z = 2. Pt(C 7H 10NS 2) 2 also crystallizes in the triclinic space group P 1 , with a = 9.905(1), b = 13.503(2), c = 15.690(2) Å, α = 67.20(1), β = 87.86(1), γ = 71.94(1)°, V = 1831.0(5) Å 3 and Z = 4. A discussion of the synthesis, characterization and structural properties is presented.