Ten-vertex polyhedral azametallaborane chemistry: a unique nido-6,9 to nido-6,8-clusterisomerization
Abstract
Reaction of the [arachno-4-NB8H12]− anion 2 with [RhCl2(η5-C5Me5)]2 in CH2Cl2 at room temperature affords a mixture of red ‘6,9’ isomer [9-(η5-C5Me5)-nido-6,9-NRhB8H11] (3) and its yellow ‘6,8’ isomer, [8-(η5-C5Me5)-nido-6,8-NRhB8H11] (4). Under the same conditions, reactions of 2 with [IrCl2(η5-C5Me5)]2 and [RuCl2(η6-MeC6H4-4-isoPr)]2 give the ‘6,8’ isomers, yellow [8-(η5-C5Me5)-nido-6,8-NIrB8H11] (5) and red [8-(η6-MeC6H4-4-isoPr)-nido-6,8-NRuB8H11] (6), respectively. In contrast, [