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Multiple coupling of silanes with imido complexes of Mo

Dalton Transactions, ISSN: 1477-9234, Vol: 43, Issue: 22, Page: 8446-8453
2014
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The bis(imido) complexes (BuN)Mo(PMe )(L) (L = PMe, CH) react with up to three equivalents of silane PhSiH to give the imido-bridged disilyl silyl Mo(vi) complex (BuN){μ-BuN(SiHPh) }Mo(H)(SiHPh)(PMe) (3) studied by NMR, IR and X-ray diffraction. NMR data supported by DFT calculations show that complex 3 is an unusual example of a silyl hydride of Mo(vi), without significant Si⋯H interaction. Mechanistic NMR studies revealed that silane addition proceeds in a stepwise manner via a series of Si-H⋯M agostic and silanimine complexes whose structures were further elucidated by DFT calculations. © the Partner Organisations 2014.

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