Tris(N,N,N′,N′,N′′,N′′-hexa-ethyl-guanidinium) dodeca-iodido-tribismuthate(III)

摘要

The asymmetric unit of title compound, (C13H30N3)3[Bi3I12], comprises one cation and two independent (1/6) fragments of the [Bi3I12]3??ions. The C—N bond lengths in the guanidinium ion range from 1.340?(4) to 1.345?(4)??, indicating partial double-bond character pointing towards charge delocalization within the NCN planes. The BiIII?ions are distorted octa-hedrally coordinated by six iodide ions, with Bi—I bond lengths ranging from 2.9206?(3) to 3.3507?(3)??. Three [BiI6]3??octa-hedra are fused together through face-sharing, forming a trinuclear [Bi3I12]3??unit.