Dimetallic Cooperativity in Regio and Steroselective C－C coupling to form Dimers of Monosubstituted Acetylenes

• Main Authors: Ting-ChiSu, 蘇廷錡
• Other Authors: Kom-Bei Shiu
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/76469549081409681498

碩士 === 國立成功大學 === 化學系 === 102 === The reaction of [Ru2(μ-dppm)2(μ-OAc)(CO)4][PF6] (1) with terminal alkynes RC≡CH in room temperature gives the alkyne complexes [Ru2(μ-dppm)2(μ-η1,η2-C2R)(CO)4][PF6] ( R = Ph (2)；Tol (3) ) . complex 1 reacts with terminal alkynes RC≡CH ( R = Ph；Tol ) in MeOH reflux to give C－C coupling complexes [Ru2(μ-dppm)2(μ-η1,η2-C2Ph)(CO)2 (μ-η2,η2-PhCH＝C－C≡CPh)] (7), [Ru2(μ-dppm)2(CO)3(μ-η2,η2-PhC＝CH－C≡CPh)][PF6] (8) and [Ru2(μ-dppm)2(μ-η1,η2-C2Tol)(CO)2(μ-η2,η2-TolHCCCCTol)] (9), but complex 1reacts with PhCH2C≡CH in MeOH reflux to give [Ru2(μ-dppm)2(CO)4(μ-η1,η2- C2CH2Ph)][PF6] (4), not C－C coupling complexes. Use complexes 2, 3 and 4 with terminal alkynes RC≡CH, which R are not identical with their ligand in MeOH reflux to give another C－C coupling complexes. Through different reaction product, can disscuss reaction pathways and explore this type of reaction is observed with the regio-and stero-selection.