High resolution CPMAS 13C NMR of organometallic solids. Observation of J coupling to tin |
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Authors: | William F. Manders Thomas P. Lockhart |
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Affiliation: | National Bureau of Standards, Gaithersburg, Maryland 20899 U.S.A. |
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Abstract: | Chemical shift and 1J(117,119Sn, 13C) data from cross polarization magic angle spinning (CPMAS) proton-decoupled solid-state 13C NMR experiments are given for the methyltin carbon in (Me2SnS)3, Me3SnOAc, Me2S(acetylacetonate)2, Me2SnCl2· 2(dimethylsulfoxide), and amorphous (Me2SnO)n. The relationship between the magnitude of the coupling constant and the coordination at tin is examined by reference to X-ray structure data. The tin-methyl 13C chemical shift was sensitive to slight variations in bond angles and bond lengths. The presence of isotopically abundant NMR-active nuclei in the molecule broadens lines, and can prevent resolution of the J coupled interaction. |
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