Sterically hindered diphosphines (Ph2P)2C=CHR (R = Me or Ph) and their derivatives

Jonathan Bookham, Fosca Conti, H.Christina E. McFarlane, William McFarlane, Mark Thornton-Pett

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11 Citations (Scopus)


Reactions of (Ph2P)2C=CHR (R = Me or Ph) with E (E = S or Se) yielded the corresponding mono- and di-chalcogenides and the mixed S/Se derivatives, 1H, 13C and 31P NMR parameters for which are reported. These are rationalized in terms of conformational preferences associated with the relative P-E and phosphorus-lone pair orientations. The complexes [M(CO)4{(Ph2P)2C=CHR}] (M = Mo or W, R = Me or Ph) have also been prepared and have NMR parameters which can be accounted for similarly. The crystal structure of (Ph2P)2C=CHMe has been determined by single-crystal X-ray diffraction and shows that the solid-state conformation is similar to that deduced in solution on the foregoing basis.
Original languageEnglish
Pages (from-to)1791-1797
JournalJournal of the Chemical Society, Dalton Transactions
Issue number12
Publication statusPublished - 1994


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