Synthesis and crystal structure of two new Bi(III) complexes {(Me2NCS2)3Bi}2 and {[(CH2)5NCS2]2BiI}2

Abstract

Six bismuth(III) complexes containing dithio-ligands formulated as (R2NCS2)3Bi [R2NCS2M = Me2NCS2Na, C4H8NCS2Na, Bz2NCS2Na] and [(R2NCS2)2BiI]2 [R2NCS2M = C5H10NCS2Na, n Bu2NCS2Na, OC4H8NCS2Na] have been obtained by reactions of bismuth(III) halides with dithiocarbamate ligands in 1 : 2 or 1 : 3 stoichiometry. All compounds were characterized by elemental and IR analyses. The crystal structures of complexes 1 and 4 have been determined by X-ray single crystal diffraction. The structure analyses reveal that BiIII in complex 1 adopts a distorted pentagonal–pyramidal coordination, due to its stereochemically active lone pair of electrons. A long Bi · S contact of 3.218 (3) Å leads to dimeric associations of molecules in the crystal structure. The structure of complex 4 is six-coordination with a distorted octahedral configuration. Intramolecular S · S weak interactions contribute to the stability and lead to a one-dimensional chain structure.