Cyano carbon-ring coupling interactions in 12 benzonitriles and three
cyanopyridines have been examined. Correlations between (n)J(CH) and (
n)J(HH) (n = 3 and 4) are given. Unresolved weak (5)J-para coupling li
mits the application of these splittings in structural determination s
tudies. (C) 1997 Elsevier Science B.V.