The Microwave Spectrum and Structure of Chlorine Trifluoride

摘要

A microwave spectrometer designed for the study of the microwave spectra of corrosive fluorine compounds has been used to observe and measure a portion of the microwave spectrum of chlorine trifluoride. A number of transitions have been identified, and from these the moments of inertia and quadrupole coupling coefficients of both Cl35F3and Cl37F3obtained. An intensity alternation was observed showing that the ClF3molecule has a C2vaxis and is planar. The moments of inertia confirm this and further show that ClF3has a distorted ``T'' structure with one short (1.598A) and two long (1.698A) ClF bonds. The angle between the two different kinds of ClF bonds is 87deg;29prime;. The quadrupole coupling coefficients khgr;aa(Cl35F3)=minus;81middot;2mc, khgr;bb(Cl35F3)=minus;64middot;7mc, khgr;cc(Cl35F3)=146 mc agree with the observed frequency,f(Cl35F3)=75.1295mc, of the pure quadrupole spectrum of ClF3, which corresponds to aneqQof 150 mc.