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Abstract
The 19F and 31P magnetic shielding anisotropies of thiophosphoryl fluoride have been determined at a single temperature and in the smectic liquid crystal phase solely, using 4-n-octyloxybenzylidene-4′ amino acetophenone (OBAA) as an orienting solvent. Measurements of the F–P–F bond angle are also reported. The absolute sign of the indirect P–F spin–spin coupling constant is found to be negative, and the anisotropy in this quantity is assumed to be negligible. In addition, the 31P spectra of phosphorus trifluoride, dissolved in a smectic liquid crystal solvent, is also investigated in this study, and the value of Δσ obtained in the smectic phase for PF3 is found to be in disagreement with the previous value measured in the nematic liquid crystal phase.
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