Structure, 31P and 13C chemical shift anisotrophy of (CH3)3P, (CH3)3PO, (CH3)3PS and (CH3)3PSe as determined by liquid crystal NMR spectroscopy |
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| Authors: | Jean-Pierre Albrand André Cogne Jean-Bernard Robert |
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| Institution: | Laboratoire de Chimie Organique Physique, Département de Recherche Fondamentale du C.E.N.G., 85, X.38041 Grenoble Cedex, France |
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| Abstract: | The 13P and 13C spectra of the triply 13C labelled molecules (CH3)3P, (CH3)3PO, (CH3)3PS and (CH3)3PSe oriented in a nematic phase are reported. The CPC bond angles have been measured. The 13P chemical shift tensor shows a large anisotropy except in the case of (CH3)3P. The abnormal large value observed for the PSe bond length suggests a large anisotropy of the 1J(PSe) spin coupling. |
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