Polyhedral monocarbaborane chemistry. Routes to neutral, monoanionic and dianionic carbo-carbaborane rods

Reaction of [BrC6H4CB9H11]–with [BH3(SMe2)] followed by iodination and treatment with [MeC6H4MgBr] gives the 23 (angstrom) [MeC6H4C6H4CB11H10C6H4Me]– monoanion, treatment of [1-Ph-1-CB9H11]– with FeCl3 and NC5H4-4-CH2C6H5 gives 21.5 (angstrom)neutral [PhCB9H8NC5H4CH2C6H5], and reaction of [1-(4-H2NC6H4)-1-CB9H9]– with ClCOC6H4COCl gives the 30 (angstrom)[(B9H9C)C6H4NHCOC6H4CONHC6H4(CB9H9)]2– dianion with a Kevlar-like central unit.