Preparation, crystal structure and thermal decomposition of phenylenediammonium dichloride salts

Abstract

Phenylene-1,2-diammonium dichloride (P-1,2-DADCl), phe¬nylene-1,3-diammonium dichloride (P-1,3-DADCl), phenylene-1,4-diammonium dichloride (P-1,4-DADCl) and 5-carboxyl-phe¬nylene-1,3-diammonium dichloride (5-carboxyl-P-1,3-DADCl) salts have been prepared and characterized by elemental, spectral, gravimetric and X-ray crystallography. Thermal decomposition of these salts has been studied by TG and DSC and shows involvement of proton transfer as a primary step. Kinetic analysis of TG data has been evaluated by model fitting method and model free isoconversional methods.