Rhenacarborane complexes with nitrosyl and alkylidene ligands. Structures of the complexes [Re{C(OMe)C6H4Me-4}(NO)(CO)(η5-7,8-C2B9H11)] and [Re(NO)(CNBut){η5,σ-7-CN(H)But-7,8-C2B9H10}]

The first examples of rhenacarborane complexes with nitrosyl ligands have been prepared and used to synthesise alkylidene(nitrosyl)rhenacarboranes and a novel complex in which a conjoined carboranyl–iminium group is bound to rhenium both through the η5-C2B3 face of the cage and the iminium carbon atom.