Magnetochemical Study of Hydroxyazobenzenes

Abstract

Abstract The magnetic susceptibilities of azobenzene and its nine derivatives were measured by the Gouy method. The procedure to estimate the molar susceptibility from the values observed for constitutional fragments of the molecule was applied to these compounds, and the empirical constant for azo-group–0.4 was determined. Twenty hydroxyazobenzenes, mainly derivatives of phenol and p-cresol, were also measured, and their molar susceptibilities were compared with the calculated values for the azophenol form and the quinonehydrazone one. The author concluded that they are all in the azophenol form in the solid state.