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Synthesis and structures of lithium alkoxytris(dimethylphenylsilyl)borates
Akihiro Tsurusaki1, Keisuke Yoshida, Soichiro Kyushin
1Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan. tsurusaki@c.s.osakafu-u.ac.jp.
Dalton Transactions (Cambridge, England : 2003)
|April 7, 2017
Abstract:
The reactions of trialkyl borates B(OR)3 (R = Me, i-Pr) with dimethylphenylsilyllithium gave lithium alkoxytris(dimethylphenylsilyl)borates 1a,b. X-ray crystallographic analysis showed that 1a,b were obtained as a contact ion pair and a solvent-separated ion pair, respectively. The 11B and 29Si chemical shifts as well as the Si-B and B-O bond lengths of 1a,b and related compounds largely change, depending on the numbers of silyl and alkoxy substituents.