Alkyne and ketone induced novel cleavage of a CC bond and a CSi bond in zirconacyclobutene–silacyclobutene fused ring compounds
✍ Scribed by Tao Yu; Liang Deng; Changjia Zhao; Zhiping Li; Zhenfeng Xi
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- French
- Weight
- 244 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
Novel cleavage patterns of C C bonds and C Si bonds were achieved via alkyne-or ketone-induced reactions of zirconacyclobutene-silacyclobutene fused ring compounds; thermodynamically favored six-membered zirconacyclohexadiene derivatives were formed in excellent yields from the four-membered zirconacyclobutenes via this unprecedented alkyne-induced
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Silicon-29 spin-lattice relaxation times and 29Si-(1H} nuclear Overhauser enhancements are reported for five trialkylsilanes and for sym-tetramethyldisiloxane, all of which contain a direct Si-H bond. Relaxation rate contributions from (Si, H) dipolar interactions and from other mechanisms are evalu