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Abstract
The formation of nitroxides during photolysis of 2-methyl-2-nitrosopropane in nematic liquid crystal 4-pentyl-4'-(5CB) has been studied by ESR at temperatures 183–343K. The kinetics of nitroxide formation is sensitive to the phase state of liquid crystalline systems. In the solid state of 5CB the kinetic manifestation of hysteresis phenomena has been established. In nematic phase 5CB the equalization of rate constants for the tert-butyl radical trapping by nitrosocompounds of different chemical structures has been observed.