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Substituent and ring size dependence of the coupling constant

✍ Scribed by M. J. Collins; P. M. Hatton; S. Sternhell; C. W. Tansey

Publisher
John Wiley and Sons
Year
1987
Tongue
English
Weight
347 KB
Volume
25
Category
Article
ISSN
0749-1581

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✦ Synopsis

The magnitude of the 45 proton-proton coupling constant across the fragment CH3-C-C-H (a probe of the bond order between the central spz-sp2 hybridized carbon atoms) has been found to be essentially independent of substitution on a toluene fragment and on the size of the ring containing the ortho-allylic fragment. The coupling constant is sensitive to direct substitution on the ortho-allylic fragment, especially where the substituent is placed tr to the methyl group.

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