Hypoelectronic isomeric diiridaboranes [(Cp*Ir)2B6H6]: the "Rule-Breakers"(Cp* = η5-C5Me5). Issue 15 (26th January 2016) - Borthakur, Rosmita
Abstract : Isolation of two 8-vertex topological diiridaborane isomers: a dodecahedron and a bicapped trigonal prism. Abstract : In an effort to synthesize supraicosahedral iridaboranes, pyrolysis of [Cp*IrCl2 ]2 with excess [BH3 ·THF ] was carried out, and this synthesis afforded the isomeric iridaborane [(Cp*Ir)2 B6 H6 ] clusters 1 and 2. The geometry of 1 was determined to be dodecahedral, i.e., similar to that of [B8 H8 ] 2−, whereas 2 was found to exhibit a cluster shape that can be derived from a nine-vertex tricapped trigonal prism by removing one of the capped vertices. The calculation of a large HOMO–LUMO gap further rationalized the isocloso structures for these isomers.