Synthesis of Rhenium Vinylidene and Carbyne Complexes from Reactions of [Re(dppm)3]I with Terminal Alkynes and Alkynols

Treatment of [Re­(dppm)3]I (dppm = PPh2CH2PPh2) with HCCPh produced the rhenium vinylidene complex ReI­(CCHPh)­(dppm)2. In the presence of HI, [Re­(dppm)3]I reacted with HCCR (R = Ph, p-tolyl, C6H4-o-CHO, (CH2)5CH3) to give the rhenium carbyne complexes [ReI­(CCH2R)­(dppm)2]I and with HCCSiMe3 to give [ReI­(CMe)­(dppm)2]­I. One-pot reactions of [Re­(dppm)3]­I, HCCC­(OH)­RR′ (RR′ = Ph2, Me2, PhMe), and HI produced the vinylcarbyne complexes [ReI­(CCHCRR′)­(dppm)2]­I.