1. Polyazolyl Chelate Chemistry. 12.1 An Unusual Mode of Coordination for the Hydrotris(methimazolyl)borato Ligand
2. Borane Complexes of Transition Metals
3. For a review of metal−boron dative bonding see: Gilbert, K. B.; Boocock, S. K.; Shore, S. G. InComprehensive Organometallic Chemistry; Abel, E. W., Stone, F. G. A., Wilkinson, G., Eds.; 1982; Pergamon: Oxford, Vol. 6, pp 880−886. However, the identity of such complexes has been questioned: Braunschweig, H.Angew. Chem., Int. Ed.1998,37, 1786.
4. The Sting of the Scorpion: A Metallaboratrane
5. The boryl complex [Ru{BClBN(SiMe3)BClN(SiMe3)2}(CO)2(η-C5H5)]6and the diborane(4)yl complex [Ru{B(NMe2)B(NMe2)Br}(CO)2(η-C5H5)]7have been described. In this context when considering unbridged 2c-2e Ru−B bonds, we specifically exclude interstitial boride clusters, ruthenaboranes, ruthenacarbaboranes, and agostic B−H−Ru interactions, wherein delocalized bonding models are appropriate.