closo-Carbametallaboranes with metal–hydrogen bonds from direct insertion into arachno-carbaboranes: the molecular structures of [2-H-2,2-(Et3P)2-1,6,2-C2CoB7H9] and [2-H-2,2-(Et3P)2-1,6,2-C2RhB7H9], and a most unusual crystallographic coincidence
Abstract
The arachno-carbaborane 1,3-C2B7H13 reacts with [Co(PEt3)4] and with [Rh(η-C3H5)(PEt3)2] to afford, respectively, [2-H-2,2-(Et3P)2-1,6,2-C2-CoB7H9] and [2-H-2,2-(Et3P)2-1,6,2-C2RhB7H9]; both structures have been established by X-ray diffraction studies, whilst they crystallise in nearly identical unit cells and the same space group, these species are not isostructural.