title: The nido-osmaboranes [2,2,2-(CO)(PPh(3))(2)-nido-2-OsB(5)H(9)] and [6,6,6-(CO)(PPh(3))(2)-nido-6-OsB(9)H(13)].
abstract: The structural characterization of the osmahexaborane 2-carbonyl-2,2-bis(triphenylphosphine)-nido-2-osmahexaborane(9), [Os(B(5)H(9))(C(18)H(15)P)(2)(CO)], (I), a metallaborane analogue of B(6)H(10), confirms the structure proposed from NMR spectroscopy. The structure of the osmadecaborane 6-carbonyl-6,6-bis(triphenylphosphine)-nido-6-osmadecaborane(13), [Os(B(9)H(13))(C(18)H(15)P)(2)(CO)], (IV), is similarly confirmed. The short basal B-B distance of 1.652 (8) A in (I), not bridged by an H atom, mirrors that in the parent hexaborane(10) [1.626 (4) A].
authors.affiliation: Department of Chemistry, University of Missouri-St Louis, St Louis, MO 63121, USA, and School of Chemistry, University of Leeds, Leeds LS2 9JT, England.
authors.forename: J
authors.initials: J
authors.lastname: Bould
authors.forename: J D
authors.initials: JD
authors.lastname: Kennedy
authors.forename: R L
authors.initials: RL
authors.lastname: Thomas
authors.forename: N P
authors.initials: NP
authors.lastname: Rath
authors.forename: L
authors.initials: L
authors.lastname: Barton