Rhodium silyl boryl hydride complexes: comparison of bonding and the rates of elimination of borane, silane, and dihydrogen.
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abstract
Spoilt for choice: a silane, dihydrogen, borane, or hydridoborate complex? The silyl boryl hydride complex [Cp*Rh(H2) (Et 3Si)(Bpin)] (Bpin = (pinacolato) boryl) could adopt any of these structures, but it appears to contain stronger B-H bonding than Si-H or H-H bonding and undergoes elimination of pinacolborane faster than of silane or hydrogen (see scheme). The bonding situation is studied by experimental and theoretical methods.