NORMAL COORDINATE ANALYSIS OF IN-PLANE VIBRATIONS OF O M P-FLUOROCHLORO AND FLUOROBROMO BENZENES

A normal coordinate analysis of the in-plane vibrations of o, m, p-fluorochloro and fluorobromo benzenes was made dividing the six molecules into two sets. Some of the assignments of these molecules made by earlier workers were revised. The frequencies of the assigned fundamentals of each set of fluorochloro and fluorobromo benzenes were then fitted by the method of damped least-squares employing a 19 parameter modified Urey-Bradley force field. © 1969.