Abstract

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The effect of molecular size on the ease of the pyrolysis of esters has been studied by py roly zing cyclohexyl formate and its homologs. Higher molecular weight esters decomposed at a lower temperature than the lower molecular weight homologs. The decrease, however, in the temperature of pyrolysis as the size of the esters increases in molecular size by one methylene group is not a regular decrease; rather, it decreases in a zig-zag fashion. Substituted cyclohexyl benzoates, with 'electronegative groups in the meta and para positions, pyrolyze more readily than do cyclohexyl benzoate or esters of aliphatic acids. The temperature of pyrolysis is directly related to the strength of the acid from which the ester is prepared and to the O-C stretching band in the infrared spectra of esters. y-Substituted esters tend to stabilize the esters toward heat.

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