{"title":"29Si and 13C Nuclear magnetic resonance studies of organosilicon chemistry","authors":"R.K. Harris, B.J. Kimber","doi":"10.1016/0001-8716(76)80004-1","DOIUrl":null,"url":null,"abstract":"<div><p><sup>29</sup>Si and <sup>13</sup>C spin-lattice relaxation times and the corresponding nuclear Overhauser enhancements have been measured for Ph<em><sub>n</sub></em>SiH<sub>4−n</sub> (<em>n</em> = 1, 2, 3), for Ph<sub>2</sub>SiHMe and for Ph<sub>2</sub>SiCl<sub>2</sub>. Thence dipolar and other contributions to the relaxation rates have been separated. The dipolar rates are used to discuss internal rotation about the phenyl-Si bond, and overall motional anisotropy. The value of <em>T</em><sub>1</sub>(Si) for PhSiH<sub>3</sub> is very short and, it is suggested, is dominated by the spin-internal-rotation interaction. Values of chemical shifts and coupling constants are also presented and briefly discussed.</p></div>","PeriodicalId":100050,"journal":{"name":"Advances in Molecular Relaxation Processes","volume":"8 1","pages":"Pages 23-35"},"PeriodicalIF":0.0000,"publicationDate":"1976-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0001-8716(76)80004-1","citationCount":"21","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advances in Molecular Relaxation Processes","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0001871676800041","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 21
Abstract
29Si and 13C spin-lattice relaxation times and the corresponding nuclear Overhauser enhancements have been measured for PhnSiH4−n (n = 1, 2, 3), for Ph2SiHMe and for Ph2SiCl2. Thence dipolar and other contributions to the relaxation rates have been separated. The dipolar rates are used to discuss internal rotation about the phenyl-Si bond, and overall motional anisotropy. The value of T1(Si) for PhSiH3 is very short and, it is suggested, is dominated by the spin-internal-rotation interaction. Values of chemical shifts and coupling constants are also presented and briefly discussed.
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