Carbyne-fluoro complexes of rhenium. Single-pot synthesis of trans-[ReF(CCH 2R)-(Ph 2PCH 2CH 2PPh 2) 2][BF 4

Abstract

Treatment of a THF solution of trans-[ReCl(N 2)(dppe) 2] (dppe = Ph 2PCH 2CH 2PPh 2) with a 1-alkyne HCCR (R = tBu, CO 2Me, CO 2Et, or C 6H 4Me-4), in the presence of Tl[BF 4]/[NH 4][BF 4], under sunlight, affords the corresponding carbyne-fluoro complexes trans-[ReF(CCH 2R)(dppe) 2][BF 4] in an unprecedented single-pot synthesis. Further reaction with [BU 4N]OH leads to the vinylidenefluoro compounds trans-[ReF(CCHR)(dppe) 2] (R  CO 2Me, CO 2Et, or C 6H 4Me-4).