Abstract
The 35Cl NQR resonance frequencies, in MHz, and asymmetry parameters are, for PCl 3: 26.1032, η = 0.066 ± 008, 26.1998, η = 0.067 ± .005 (two equivalent chlorines), and for AsCl 3 : 24.9581, η = 0.077 ± .008; 25.0567, η = 0.071 ± .006; 25.4036, η = 0.075 ± .006. Angles between the field gradient Z axes are close to the bond angles determined by X-ray crystallography. A doublet splitting in the spectrum of PC1 3 is ascribed to the effect of 31P- 35Cl dipole-dipole coupling together with an isotropic coupling of −0.3 kHz.
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