Studies of selenium–carbon nuclear spin–spin coupling by magnetic multiple resonance

McFarlane, W., Rycroft, D. S. and Turner, C. J. (1977) Studies of selenium–carbon nuclear spin–spin coupling by magnetic multiple resonance. Bulletin des Sociétés Chimiques Belges, 86(6), pp. 457-463.

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1H–{77}Se and 13C–{1H} magnetic double resonance experiments have been used to give the signs of 77Se–13C and 77Se–1H coupling constants in a range of organoselenium compounds in which the selenium atom has zero to 3 electron lone pairs. 1J(77Se–13C) is always negative but receives a substantial positive increment when the selenium atom loses all its electron lone pairs. The variations of 1J(77Se–13C) depend in a complex way upon molecular structure, but the observation of a magnitude of more than 45 Hz for this coupling constant is generally indicative of the presence of a direct selenium–carbon bond. 3J(77Se--H) is found to be always positive, as is 2J(77Se--H) except in species in which the selenium atom has no electron lone pairs.

Item Type:Articles
Keywords:NMR spectroscopy, multiple resonance.
Glasgow Author(s) Enlighten ID:Rycroft, Dr David
Authors: McFarlane, W., Rycroft, D. S., and Turner, C. J.
Subjects:Q Science > QD Chemistry
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Bulletin des Sociétés Chimiques Belges
Journal Abbr.:Bull. Soc. Chim. Belg.

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