Abstract
It is shown that biaxial thermotropic nematics have anomalously small parameters of biaxial orientational order of molecules, which are one or two orders of magnitude lower than the limit of their detection by NMR. This accounts for the dramatic discrepancy between the optical and NMR data on biaxiality of these compounds.
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Aver'yanov, E.M. Structural and Optical Anisotropy of Biaxial Nematics. Journal of Structural Chemistry 42, 598–600 (2001). https://doi.org/10.1023/A:1013141809592
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DOI: https://doi.org/10.1023/A:1013141809592