DEUTERON QUADRUPOLE COUPLING IN SOME SOLID CHLORINATED HYDROCARBONS

We report deuteron quadrupole coupling constants in solids CDCl 3, CD2Cl2, CD2ClCD2Cl, CD2CCl3, and CD3CCl2CD,. At 77°K these are 167.6±0.8, 169.6±1.1, 171.7±0.8, 174.3±.6, and 174.7±1.9 kHz, respectively, assuming an axial quadrupole interaction. We also report here a coupling constant of 149.3± 0.5 kHz for D in DCl at 77°K, in agreement with the data of Genin, O'Reilly, Peterson, and Tsang. Deuteron pure quadrupole spectra were observed by a pulse double-resonance technique suggested by Hahn and co-workers, in which the halogen serves as indicator nucleus. Interpretation of the results in terms of the electronic structure is briefly discussed.