Studies on the Reaction Mechanisms in Heterocyclic Compounds. IV. Ionic Mechanism in the Reaction of Benzoyl Peroxide and Substituted Benzaldehyde (2-Phenyl-3-quinoxalinyl) hydrazone

Abstract

The reaction between benzoyl peroxide and hydrazones follows second-order kinetics, first-order in respect to peroxide and hydrazone. The reaction is accelerated by electron donation groups in hydrazone, and the electronic effect follows Brown-Okamoto's ρσ⁺ relationship. Radical inhibitors and polymerizable monomers have no effect. It was concluded that the reaction is not a radical chain process, but involves an ionic process without radical formation, and a possible reaction mechanism is proposed.