Studies on isomerism of 1:2 iron complexed dye based on 1-(5'-nitro-2'-hydroxyphenyl)-3-cyano-5-(4''-sulphonamidophenyl)formazan

摘要

During the synthesis of previously described new 1:2 iron complexes of 1,5-diaryl-3-cyanoformazanesit was found that the metalisation process is dependent on the pH of the reactoin media and in some cases two isomeric products appear. These isomers exhibited the same quantiative composition but different colours and physico-chemical properties. With the use of ~1H-NMR and IR analysis and the measurements of magnetic moments an attempt to atrtribute the chemical structure of both isomers of 1:2 type iron complex of 1-(5'-nitro-2'-hydroxyphenyl)-3-cyano-5-(4''-sulphonamidophenyl)formazan has been made.