Spectrophotometric determination of Chloranil via charge transfer complex formation

Abstract

A sensitive and economical spectrophotometric method has been
developed for the determination of chloranil in pure form. The method is based on the
reaction of chloranil as π-acceptor with resorcinol as π-donor to give highly coloured
complex species in aqueous solution which absorbs maximally at 495nm. Beer's law
is obeyed in the concentration range 2-24 μg ml-1 with high apparent molar
absorptivity of 10.03×103 l.mol-1 cm-1.