title: Probing the intrinisic structure and dynamics of aminoborane coordination at late transition metal centers: mono(σ-BH) binding in [CpRu(PR3)2(H2BNCy2)]+.
abstract: Aminoboranes, H(2)BNRR', represent the monomeric building blocks from which novel polymeric materials can be constructed via metal-mediated processes. The fundamental capabilities of these compounds to interact with metal centers have been probed through the coordination of H(2)BNCy(2) at 16-electron [CpRu(PR(3))(2)](+) fragments. In contrast to the side-on binding of isoelectronic alkene donors, an alternative mono(σ-BH) mode of aminoborane ligation is established for H(2)BNCy(2), with binding energies only ~8 kcal mol(-1) greater than those for analogous dinitrogen complexes. Variations in ground-state structure and exchange dynamics as a function of the phosphine ancillary ligand set are consistent with chemically significant back-bonding into an orbital of B-H σ* character.
authors.affiliation: Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, UK. Simon.Aldridge@chem.ox.ac.uk
authors.forename: Dragoslav
authors.initials: D
authors.lastname: Vidovic
authors.forename: David A
authors.initials: DA
authors.lastname: Addy
authors.forename: Tobias
authors.initials: T
authors.lastname: Krämer
authors.forename: John
authors.initials: J
authors.lastname: McGrady
authors.forename: Simon
authors.initials: S
authors.lastname: Aldridge