A.T. Ramadan, A.; I. Ibrahim, A.; A. El-Inany, G.; F. Eid, M. Metal Chelates of Hydrazo-?-Diketone Ligands. Chelating Tendencies of 2-Carboxyphenylhydrazodibenzoylmethane and 2-Carboxyphenylhydrazothienoyltrifluoroacetone. ajc 2010, 3, 351-359.