Premium
13 C T 1 NMR study of arylmercury compounds. Barriers to rotation about the carbon–mercury bond
Author(s) -
Thomas Ruthanne D.,
Rowland Keith E.
Publication year - 1988
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.1260260205
Subject(s) - chemistry , mercury (programming language) , internal rotation , rotation (mathematics) , carbon 13 , carbon 13 nmr , crystallography , stereochemistry , medicinal chemistry , geometry , mechanical engineering , mathematics , computer science , engineering , programming language , physics , quantum mechanics
Barriers to rotation about the preferred axis, C‐4HgC‐4′, were determined for diphenyl‐, bis( o ‐tolyl)‐ and bis( m ‐tolyl)‐mercury from 13 C T 1 relaxation times as a function of temperature in DMSO and in 1,1,2,2‐tetrachloroethane–CCl 4 . Based on results for the unsymmetrical compound phenyl( o ‐tolyl)mercury, the rotation about the preferred axis is interpreted as rotation about the carbon–mercury bond. The average barrier to internal rotation of 3.6 ± 0.6 kcal mol −1 is constant as a function of both methyl substitution and coordinating and non‐coordinating solvents.