Abstract
We report the results of calculations by the CNDO/2 molecular orbital method for the intensities of the
v
19a and
v
19b ring vibration of a series of mono-substituted benzenes and have repeated earlier calculations on the intensities of the corresponding
v
8a and
v
8b vibrations. These results are compared with intensity measurements in carbon tetrachloride solution made by improved techniques. Some gas phase measurements and results obtained for some deuterated compounds are included.