<正> A series of novel mesogenic polyesters with 2-dich1oromethylhydroquinone moieties weresynthesized by polycondensation of the novel diacyl chloride monomer 2-dichloromethyl-1

4-bis （4’-chloroformylbenzoyl） oxybenzene-（I） with α

ω-polymethylenediols including ethyleneglycol

1

4-butanediol

1

6-hexanediol and 1

10-decanediol. The diacyl chloride monomerwas synthesized by simultaneous transformations of both the carboxy and formaldehydegroups of 2-formyl-1

4-bis （4’-carboxybenzoyl） oxybenzene into acyl chloride anddichloromethyl groups respectively. The syntheses of the monomer （I） and the polymers werereported.