A thermogravimetric study of alkyl substituted dipyrrolylmethenes, biladiene, and their complexes with zinc(II) and copper(II)

Thermooxidative destruction off alkyl substituted linear and cyclic di- and tetrapyrrole compounds, their hydrobromides, and their complexes with zinc (II) and copper (II) was studied by the method of thermogravimetry. The the rmal stability of the compounds was shown to be determined to a substantial extent by the structure of molecules and the nature and length of peripher al substituents. The formation of salts and complexes with metals substanti ally increased the thermal stability of linear di- and tetrapyrrole compoun ds.