Microwave Determination of the Structure of Fluorobenzene

Abstract

3D-, 4D-, and 2,4,6 D3-fluorobenzene have been prepared. Their microwave spectra have been recorded and analyzed. Values of their rotational constants together with known values of the rotational constants of ordinary fluorobenzene do not suffice for an unambiguous calculation of the 11 geometrical parameters of the molecule but by assistance from valence theory a small number of fairly probable models may be pointed out.