Molecules p. 8451 - 8462 (2011)
Update date:2022-08-03
Topics:
Hong, Jang-Hwan
The reductive cleavage of the Si-Si bond in 1,1-bis(1-methyl-2,3,4,5- tetraphenyl-1-silacyclopentadiene) [(C4Ph4SiMe) 2] (1) with either Li or Na in THF gives the silole anion [MeSiC 4Ph4]- (2). The head-to-tail dimerization of the silole anion 2 gives crystals of the disilatricyclic diallylic dianion [(C4Ph4SiMe)2]-2 (3). The derivatization of 3 (crystals) with bromoethane (gas) under reduced pressure provides [(MeSiC4Ph4Et)2] (4) quantitatively. The reverse addition of 3 in THF to trimethylsilyl chloride, hydrogen chloride, and bromoethane in THF gives 1-methyl-1-trimethylsilyl-1-silole [Me 3SiMeSiC4Ph4] (6), 1-methyl-2,3,4,5- tetraphenyl-1-silacyclo-3-pentenyl-1-methyl-1-silole [C4Ph 4H2SiMe-MeSiC4Ph4] (7), and 1-methyl-2,5-diethyl-2,3,4,5-tetraphenyl-1-silacyclo-3-pentenyl-1-methyl-1- silole [C4Ph4Et2SiMe-MeSiC4Ph 4] (8), respectively. The reaction products unambiguously suggest that the silole anion [MeSiC4Ph4]- is generated by coordination of the chloride ion at the silicon atom in 3 or by the nucleophilic substitution of either chloride or bromide ion at one of two silicon atoms in 3. The quenching reaction of 3 dissolved in THF with water gives 1,2,3,4-tetraphenyl-2-butene, the disiloxane of 1-methyl-2,3,4,5- tetraphenyl-1-silacyclo-3-pentenyl [O(MeSiC4Ph4) 2] (10) and methyl silicate.
View MoreGoldwills Pharmaceuticals Co., Ltd.
Contact:0916-2237889 13991621155
Address:North Suburb of Hanzhong city, Shaanxi Province
Nanjing Yuance Industry&Trade Co., Ltd.
website:http://www.njyuance.cn/
Contact:+86-25-85439097
Address:B1702, Aoti Bldg, No. 130, Aoti Avenue, Nanjing, China
Chengdu Gelipu Biotechnology Co., Ltd.
website:http://www.glp-china.com
Contact:86-28-82610909
Address:chegndu
Jinan Jiaquan Chemical Co.,Ltd
Contact:+86-531-62318366
Address:Room 502 of Yidonghuayuan No.601 Huaxin Road Licheng District Jinan China
Sanming Coffer Fine Chemical Industrial Co., Ltd
website:http://www.cofferxm.com/
Contact:+86-598-5853979
Address:Jin-sha Yuan Chuang-ye Park,Hi-Tech Development Zone,Sanming City P.R.China
Doi:10.1080/07328319708001361
(1997)Doi:10.1016/S0040-4039(00)72308-2
(1968)Doi:10.1016/j.ejmech.2018.08.060
(2018)Doi:10.1016/S0040-4039(98)00792-8
(1998)Doi:10.1246/bcsj.37.1858
(1964)Doi:10.1039/jr9540000779
(1954)