METAL-HYDRAZINE HOMOPHTHALIC ACID COMPLEXES AS PRECURSORS OF NANOMETAL POWDER.

Hydrazine complexes, M(N2H4)0.5A2 where M=Co and Cu and M(N2H4)A2 where M=Cd and Ni and Cd(N2H4)A where A = homophthalic acid(H2hp), C6H4(CH2COOH)(COOH) have been prepared by the reaction of aqueous solution of hydrazine hydrate, homophthalic acid and metal nitrate at pH = 5-7. The acid shows only mono ionic nature in the complexes by deprotonation from aliphatic carboxylic acid group. The elemental analysis of complexes, IR data shows uN-N in the range 933-987 cm-1, uC=O sym & uC=O assym of the aliphatic carboxylate respectively in the range of 1620-1481 cm-1 & 1404-1381 cm-1 respectively and uOH of COOH group around 3400 cm-1 confirm the structure of complexes. UV-Visible & VSM data substantiate the geometry of complexes. Simultaneous TG-DSC data indicate that the complexes undergo decomposition to give nano metal powder. [ABSTRACT FROM AUTHOR]