The Preparation and Crystal Structure of a Unique Bismuth Complex with Ethylene Glycol: the Tris[ethane-1,2-diolato(2-)]dibismuth(III) Polymer Hydrate
A novel efflorescent complex of bismuth(III) with ethylene glycol has been synthesized, and its structure determined by single-crystal X-ray diffraction and refined to a residual R 0簵5 for 1811 observed reflections. Crystals are triclinic, space group P-1, with two dimers forming the asymmetric unit in a cell with dimensions a 8縸5(3), b 10緹6(4), c 7絸6(3) Ŭ a 93籹(3), ߠ106綱(3), ? 105緲(3)The [Bi2(C2H4O2)3] dimer unit, which comprises two different bismuth centres, one five-, the other six-coordinate, is extended into a stable three-dimensional polymer framework via associations through all three ethane-1,2-diolato(2- ) ligands which are bidentate and, in most cases, bridging. The lattice also contains weakly associated but uncoordinated molecules of hydration which are considered responsible for the crystal instability.
Australian Journal of Chemistry