THERMAL DECARBOXYLATION OF CHLOROBENZOIC ACIDS

Thermal decarboxylation of o-chloro- and 2-4-dichlorobenzoic acids in resorcinol solution follows S_E². mechanism. The activation energies, frequency factors and entropies of activation are: 32300 cals. mole ^-1, 6.76x10¹⁰ sec. ^-1 and ^_12.0 cals. deg.^-1 for o-chlornbenzoic acid, and 27600 cals mole^-1, 3.98X 10⁹sec.^-1 and ^_17.6 cals. deg.^-1 for 2 :4-dichlorobenzoic acid.