Photochemistry of 1,4-Bis(pentamethyldisilanyl)butadiyne: Formation of Silacyclopropene Intermediates

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• 作者：Seong Taek Lee ; Eun Kyung Baek ; and Sang Chul Shim
• 刊名：Organometallics
• 出版年：1996
• 出版时间：April 16, 1996
• 年：1996
• 卷：15
• 期：8
• 页码：2182 - 2184
• 全文大小：174K
• 年卷期：v.15,no.8(April 16, 1996)
• ISSN：1520-6041

文摘

Irradiation of1,4-bis(pentamethyldisilanyl)butadiyne (BPDB) in methanol yields two 1:1 photoaddition products (1 and 2) and one 1:2 photoadduct(3).Adduct 1 is the primary photoproduct while 2and 3 arethe secondary products, 3 being formed via twosilacyclopropene intermediates. Irradiation of BPDBwithacetaldehyde and acetone in deaerated methylene chloride yields only 1:1 photoadducts (4-6),probably dueto the steric effects of the initially formed 1-oxa-2-silacyclopent-3-ene ring preventing the formation of thesecond silacyclopropene intermediate from the 1:1 photoadducts.