The formation of alkyne and alkynyl complexes by reaction of 1-alkynes with trans-[M(N 2) 2(PH 2PCH 2CH 2PPh 2) 2] (M  Mo OR W) and with [Mo(Ph 2PCH 2PPh 2) 3]: X-ray structure of trans-[Mo(CCPh) 2(PH 2PCH 2CH 2PPh 2) 2

Abstract

Reaction of RCCH (R  Ph, CO 2Meor CO 2Et) with trans-[M(N 2) 2(dppe) 2] (M  Mo or W; dppe  Ph 2PCH 2CH 2PPh 2) or [Mo(dppm) 3] (dppm  Ph 2PCH 2PPh 2) gives the alkyne complexes [M(RCCH) 2(diphos) 2] (diphos  dppe, M  Mo, R = Ph; dihpos  dppm, M  Mo, R  Ph or CO 2Me) and the alkynyl complexes trans-[M(cCR) 2(dppe) 2], [MH 2(CCR) 2 (dppe) 2] (M  Mo or W. R  Ph, CO 2Me or CO 2Et) and cis-[WH(CCCO 2Me)(dppe) 2]: the X-ray structure of trans-[Mo(CCPh) 2(dppe) 2] is reported.