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Abstract
In recent years, heighted interest has been shown in thiocholesterol and its derivatives. First of all, some thiocholesterol esters derived from ω-phenyl-alkanoic acids possess highly temperature-sensitive thermotropic cholesteric liquid crystal phases. At present however, there are not sufficient data about the mesomorphism of thiocholesterol derivatives, for apart from the above esters, only unsubstituted n-alkanoates and n-alkyl carbonates of thio-cholesterol have been studied and described.