The influence of liquid crystal ordering in nematic, smectic and isotropic
phases on thermodynamic parameters of a reversible thermal dissociation of
dimeric 2,2-bis[2-(p-dimethylaminophenyl)indan-1,3-dione] into two stables
2-(p-dimethylaminophenyl)indan-1,3-dione2-yl radicals was investigated.