Solvent effects on barrier to rotation of enaminonitriles using inversion transfer (1)H NMR spectroscopy and FTIR spectroscopy.

The barrier to rotation and hydrogen bonding interactions of 2,2-dicyano-1-(N,N'-dimethylamino)vinylbenzene (1) were studied in a range of solvents. The barrier to rotation of 1 in chloroform was 14.8 kcal/mol and increased by 1.