THE HARMONIC FORCE FIELD OF NITRIC ACID

Author Institution: Radiation Laboratory University of California“A normal coordinate treatment was carried out for the $HNO_{3}$ and $DNO_{3}$ molecules employing the Wilson FG matrix method and a general quadratic potential function. By means of a preliminary $C_{2v}$ approximation, it was possible to evaluate sets of reasonable force constants as a function of the $N=O, N- O$ bond-bond interaction constant. The derived quantities have been correlated with corresponding ones of structurally related molecules.