Cycloaddition reactions of tetrafluorodisilacyclobutene with 1,3-butadienes mediated by Ru3(CO)12. VI. Control by steric effects of the substituents
作者:C.Y. Huang、C.S. Liu
DOI:10.1016/0022-328x(89)85064-8
日期:1989.9
1,2,2-tetrafluoro-1,2-disilacyclobutene (1) with various 1,3-butadienes mediated by Ru3(CO)12 are described. The reactions proceed distinctly via 1,1-, 1,2-, and 1,4-additions, and are controlled entirely by the stericeffects of the substituents. In the initial stages of the reactions compound 1 and Ru3(CO)12 form the intermediates F2u(CO)4 (I) and (F2u(CO)3 (II). Compound II with two disilametallacycles
Chelate transition-metal compounds with two siliconatoms bound to the central metal are obtained from the reaction between [Ni(CO)4] and the t-butyl substituted tetrafluorodisilacyclobutene C6H10F4Si2.
由[Ni(CO)4 ]与叔丁基取代的四氟二硅环环丁烯C 6 H 10 F 4 Si 2的反应获得具有两个硅原子键合至中心金属的螯合过渡金属化合物。
Cycloaddition reactions between tetrafluorodisilicyclobutene and cyclic dienes mediated by transition metal carbonyls
作者:C.H. Lin、C.Y. Lee、T.T. Jzang、C.C. Lin、C.S. Liu
DOI:10.1016/0022-328x(88)83150-4
日期:1988.12
Under the mediation of transitionmetal carbonyls, cycloaddition of 3-t-butyl-1,1,2,2-tetrafluoro,2-disilacyclobutane (1) to various cyclic dienes have been studied under photochemical conditions. For conjugates dienes, Ni and Co mediated reactions give 1,4-addition products, whereas Fe, Mo and W mediated reactions result in 1,2-addition products. The hard metal Cr mediates the reactions to give products
Metal-mediated cycloaddition reactions of 1,1,2,2-tetrafluoro-1,2-disilacyclobutene with cyclohexadiene. Correlation between the stereochemistry of intermediates and reaction pathways
作者:Cheng Hsien. Lin、Chi Young. Lee、Chao Shiuan. Liu
DOI:10.1021/ja00266a048
日期:1986.3
Lorsque la reaction est conduite photochimiquement en presence de Fe(CO) 5 on obtient des derives du disila-1,4 naphtalene. Mise en evidence d'un complexe de Fe carbonyle comme intermediaire de la reaction
Lorsque la 反应 est 导管光化学在 obtient des 上存在 de Fe(CO) 5 衍生 du disila-1,4 萘。Mise en evidence d'un complexe de Fe carbonyle comme intermediaire de la反应
Cycloaddition reactions of 1,1,2,2-tetrafluoro-1,2-disilacyclobutene with aldehydes and ketones
作者:Yao-Bin Lu、Chao-Shiuan Liu
DOI:10.1016/s0022-328x(00)98572-3
日期:1983.2
The reactions of 1,1,2,2-tetrafluoro-1,2-disilacyclobutene with benzophenone, pinacolone, acrolein and crotonaldehyde are studied at −30°C. The product formation is best rationalized in terms of an initial attack by the carbonyl oxygen on one of the two silicon atoms, which assists the cleavage of the Si-Si bond to form a diradical intermediate, followed by either ring closure or hydrogen abstraction