Reactions of bis[1,2-bis(dialkylphosphino)ethane]-(dihydrogen)hydridoiron(1+) with alkynes
Abstract
The compounds [FeH(H2)(dmpe)2]BPh4 and [FeH(H2)(depe)2]BPh4(dmpe = Me2PCH2CH2PMe2 and depe = Et2PCH2CH2PEt2) reacted with terminal alkynes R′CCH (R = Me, Pri or Ph) to yield a variety of structures, apparently formed in sequence, bis(alkynyl), alkynyl(vinylidene) and substituted butenynyl complexes of iron(II), which also contain bis(diphosphines). The structures of trans-[Fe(CCMe)(CCHMe)(dmpe)2]BF4, trans-[Fe(CCPri)(CCHPri)(dmpe)2]BF4, [[graphic omitted]CHMe)-(depe)2]BPh4 and [[graphic omitted]CHPh)(dmpe)2]BPh4 have been determined and the interconversions of the complexes are discussed.