Selenoketenyl and selenoalkyne complexes via the reactions of ketenyl complexes with Woollins’ reagent

Abstract

The complexes [ML(η²-OCCR)(CO)(Tp)] [M = W, Mo; L = PMe₂Ph, PPh₃, P(OMe)₃; R = C₆H₄Me-4; Tp = hydrotris(pyrazol-1-yl)borate] react with ‘Woollins’ reagent’ [4(PPh)₅/5Se₈] to provide the first examples of selenoketenyl complexes [ML(η²-SeCCR)(CO)(Tp)], alkylation of which provides selenoalkyne complexes; the crystal structures of [W(η²-SeCCR)(CO)(PMe₂Ph)(Tp)] and [W(η²-MeSeCCR)(CO)(PPh₃)(Tp)]I are also reported.