Previously reported methods of preparation of diesters of tetrachlorophthalic acid' have generally involved either the reaction of a metallic salt of the acid with an alkyl halide or sulfate or the re- action of tetraclilorophthalyl chloride2 with a so- ... Tetrachlorophthalate Di-n-propyl Diallyl' Di-n-but yl Di-n-amyl Di-n-hexyl Di-2-et hylhexyl' Di-n-octyl Di-n-decyl ... TABLE I DIALKYL TETRACHLOROPHTHALATES B. P., Sapon. equiv. OC. Mm. 12% Calcd. Found 170-175 ...