Stability and Thermodynamics of RH-124(4n-Butyl-4H-1,2,4 triazole) with Transition Metals

Department of Chemistry, Punjab Agricultural University, Ludhiana

Manuscript ,received 25 September 1978, revised 29 August 1979, accepted 18 May 1980

Stepwise stability constants of the complexes of RH-124(4n-butyl-4H-1,2,4 triazole) with manganese(II), cobalt(II), nickel(II), copper(II) and zinc(II) were studied in aqueous medium at 25 and 35^o at \(\mu\)=0.05 and 0.10M. The changes in the values of free energy of formation (\( \bigtriangleup\)G), enthalpy (\( \bigtriangleup\)H) and entropy (\( \bigtriangleup\)S) have been reported. The values of \( \bigtriangleup\)G were more negative at 35^o indicating that complex formation is facilitated at higher temperature. The \( \bigtriangleup\)H and \( \bigtriangleup\)S values indicate that complexes are entropy stabilized.