Structural studies of Group 5B–halide–dithio-ligand complexes. Part 7. Crystal structures of the 1 : 1 adducts of (NN-diethyldithiocarbamato)-di-iodobismuth(III) with 2,2′-bipyridyl and 2,2′:6′,2″-terpyridyl

Abstract

The crystal structures of the title compounds, [Bi(S₂CNEt₂)l₂(bipy)], (1), and [Bi(S₂CNEt₂)l₂(terpy)], (2)(bipy = 2,2′-bipyridyl, terpy = 2,2′:6′,2″-terpyridyl), have been determined by single-crystal X-ray diffraction methods at 295(1) K and refined by least-squares procedures to conventional residuals of 0.047 and 0.045 respectively for 2 794 and 1 589 ‘observed’ reflections. Crystals of (1) are triclinic, space group P, with a= 13.432(5), b= 10.122(4), c= 9.780(5)Å, α= 117.66(3), β= 98.89(4), γ= 100.42(3)°, and Z= 2. Crystals of (2) are monoclinic, space group P2₁/c, with a= 9.122(4), b= 11.440(6), c= 24.684(9)Å, β= 94.21(3)°, and Z= 4. The molecule of (2) is pseudopentagonal bipyramidal in its co-ordination, the two iodine atoms lying axial [Bi–l, 3.070(2), 3.031 (2)Å; l–Bi–l, 169.0(1)°]. In (1), a binuclear complex is formed, [(bipy)l(Et₂NCS₂)Bil₂Bi(S₂CNEt₂)l(bipy)], with a pair of bridging iodine atoms.