Macropolyhedral boron-containing cluster chemistry. Isolation and characterisation of the eighteen-vertex nido-5′-iridaoctaborano[3′,8′ : 1′,2]-closo-4-iridadodecaborane, [(CO)(PMe3)2IrB16H14Ir(CO)(PMe3)2]

摘要: The novel eighteen-vertex macropolyhedral diiridaborane [(CO)(PMe3)2IrB16H14Ir(CO)(PMe3)2] has been isolated in low yield from the products of thermolysis nine-vertex arachno-monoiridaborane [(CO)(PMe3)2HIrB8H12], and examined by single-crystal X-ray diffraction analysis, NMR spectroscopy mass spectrometry. framework consists a closo-type twelve-vetex {IrB11} subcluster nido-type eight-vertex {IrB7} fused with two boron atoms common. In addition there is an iridium–boron two-electron two-centre intercluster cross-linkage that suprafacial to open nido subcluster. results are briefly discussed terms bonding schemes among individual subclusters.