The Zeeman effect of 35Cl pure quadrupole resonance was studied on a single crystal of the 2SbCl3·C6H6 molecular complex at room temperature; it was found that the Cl–Sb–Cl bond angles of two nonequivalent SbCl3 molecules are 96.2°, 94.7°, 92.2°; 94.5°, 92.8°, and 95.2°, with an uncertainty of 1°. The asymmetry parameters for the six chlorine atoms were found to be 0.085±0.001, 0.055±0.004, 0.117±0.005, 0.119±0.005, 0.112±0.005, and 0.160±0.007, listed in the order of decreasing resonance frequencies. The bond character of the Sb–Cl bond was also calculated from the quadrupole coupling constant. It was found that the Sb–Cl bond corresponding to the lowest resonance lines in each nonequivalent SbCl3 molecule has a larger ionicity than the remainder. Moreover, the former has less of a temperature dependence than the latter. Finally, this complex may be assigned to the Ci or C1 symmetry class from the patterns of zero-splitting and from the intensity ratios of the multiplet of the spectrum.
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