- 作者: Fung-E Hong* , Fang-Ching Lien, Yu-Chang Chang and Bao-Tsan Ko
- 作者服務機構: Department of Chemistry, National Chung-Hsing University, Taichung 40227, Taiwan, R.O.C.
- 中文摘要:
Treatment of Co4(CO)12 with an excess of trimethylsilylacetylene (TMSA) in the presence of tri(2-thienyl)phosphine in THF at 25 °C for 2 hours yielded six compounds. Two pseudo-octahedral, alkyne-bridged tetracobalt clusters, [Co4(m4-h2-HCoCSiMe3)(CO)10(m-CO)2] (4) and [Co4(m4-h2-HCoCSiMe3)-(CO)9(m-CO)2{P(C4H4S)3}] (6), along with an alkyne-bridged dicobalt complex, [Co2(CO)5(m-HCoCSiMe3)- {P(C4H4S)3}] (5), were obtained as new compounds. The addition of the thienylphosphine ligand, in fact, facilitates the reaction rate.
Reaction of an alkyne-bridged dicobalt complex, [(h2-H-CoC-SiMe3)Co2(CO)6] (3), with a bi-functional ligand, PPh(-CoC-SiMe3)2, yielded an unexpected six-membered, cyclic compound, {(Ph)(Me3Si-CoC)P[(h2-CoC-SiMe3)Co2(CO)5]}2 (7).
All of these new compounds were characterized by spectroscopic means; the solid-state structures of (5), (6) and (7) have been established by X-ray crystallography. - 英文摘要: --
- 中文關鍵字: Phosphine; Pseudo-octahedral cobalt cluster; Six-membered ring.
- 英文關鍵字: Phosphine; Pseudo-octahedral cobalt cluster; Six-membered ring.