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Influence of the phosphorus lone pair on coupling constants in vinylphosphines
Author(s) -
Mitchell Terence N.,
HeescheWagner Kerstin,
Belt HeinzJoachim
Publication year - 1991
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260290115
Subject(s) - chemistry , lone pair , coupling constant , phosphorus , crystallography , coupling (piping) , stereochemistry , computational chemistry , organic chemistry , molecule , quantum mechanics , physics , mechanical engineering , engineering
Multinuclear NMR data are presented and discussed for a variety of vinylphosphines in which the vinyl group bears one, two or three substituents; these include organic and trimethylstannyl residues. The orientation of the phosphorus lone pair can be determined from two‐bond phosphorus‐carbon coupling constant values. The magnitudes of the 3 J (PCCSn), 4 J (PCCSnC) and 5 J (PCCSnCH) coupling constants are clearly determined by a throughspace interaction when P and C are in a cis configuration.