Normal coordinate analysis of the 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

Revised Franck-Condon factors for the ionization transition of O<SUB>2</SUB> and the second negative band system of O<SUP>+</SUP><SUB>2</SUB>

Franck-Condon factors are calculated for the ionization transition of O<SUB>2</SUB> and the second negative bands of O<SUP>+</SUP><SUB>2</SUB> using revised molecular constants for the ground state of O<SUP>+</SUP><SUB>2</SUB>. The potential functions of the various states considered are constructed by the RKR method using an exact technique presented by Zeleznik