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Carbon-13 nuclear magnetic resonance spectra of exo- and endo-2-norbornyltrimethyl-stannanes: Corrected assignments

✍ Scribed by William Kitching

Publisher
John Wiley and Sons
Year
1982
Tongue
English
Weight
152 KB
Volume
20
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The ^13^C NMR spectra of pure exo‐2‐norbornyltrimethylstannane and a mixture of the exo‐ and endo‐isomers have been recorded. ^1^H–^13^C polarization transfer spectra have been obtained and require the previously reported assignments for C‐3 and C‐4 in the exo‐isomer to be reversed. The reported assignments for the endo‐isomer are correct. The new assignment for C‐4‐exo [with J(^119^Sn,^13^C) vic=12 Hz, instead of the previously assigned J(vic)=23 Hz], has a very minor effect on the nature of the Karplus curve [for ^3^J(^119^Sn,^13^C)] generated previously.

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