The synthesis and characterisation of homo- and heterobimetallic 1,14,2,9- and 1,14,2,10-M2C2B10 14-vertex metallacarboranes†
Abstract
A high-yielding synthesis of the 13-vertex cobaltacarborane 4-Cp-4,1,12-closo-CoC2B10H12 is described and this compound used to prepare the known 14-vertex species 1,14-Cp2-1,14,2,10-closo-Co2C2B10H12 (II) and 1-(p-cymene)-14-Cp-1,14,2,10-closo-RuCoC2B10H12 (IV), the latter by a new route. The related species 1,14-Cp2-2,10-Me2-1,14,2,10-closo-Co2C2B10H10 (1) and 1,14-(η-C9H7)2-1,14,2,10-closo-Co2C2B10H12 (2) are also reported. Polyhedral expansion of 4,1,8-CoC2B10 compounds affords a different isomer of the 14-vertex bimetallacarboranes, 1,14,2,9-Co2C2B10, and three examples, 1,14-Cp2-1,14,2,9-closo-Co2C2B10H12 (3), 1,14-Cp2-2,9-Me2-1,14,2,9-closo-Co2C2B10H10 (4) and 1,14-(η-C9H7)2-1,14,2,9-closo-Co2C2B10H12 (5), are prepared and characterised. Patterns in
- This article is part of the themed collection: Boranes and borohydrides