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Signs of proximate 31P, 19F and 19F, 19F spin–spin coupling constants in 2-trifluoromethylphenyldifluorophosphine

✍ Scribed by Ted Schaefer; Kirk Marat; Alberta Lemire; Alexander F. Janzen

Publisher
John Wiley and Sons
Year
1982
Tongue
English
Weight
195 KB
Volume
18
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

In 2‐trifluoromethylphenyldifluorophosphine the proximate couplings ^4^J(^19^F^31^P) and ^5^J(^19^F^19^F) are + 68.3 and + 8.3 Hz, respectively. ^1^J(^13^C^31^P) is −57.0 Hz, ^2^J(^13^C‐1, ^10^F) is + 9.9 Hz and ^2^J(^13^C‐6, ^13^C‐6, ^31^P) is + 10.1 Hz. The trifluoromethyl substituent induces substantial changes in some coupling constants, particularly those between the ^31^P and ring ^13^C nuclei.

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