The electronic absorption spectra and thermodynamics of axial coordination reaction of 5 (4 glycine butoxyphenyl) 10,15,20 triphenyiporphintozinc with substituted pyridines in CHCl 3 were studied.Coordination numbers and equilibrium constants of axial coordination reaction were measured by visible spectra techniques.The changs of standard molar enthalpies and standard molar entropies of reaction were obtained from the plots of ln K vs 1/T.The influence of temperature and axial ligands on the axial reaction were discussed.
In this paper,the electric absorption spectra of axial coordination of Zn[Val-TPP] with imidazole was inverstigated.Coordination number and equilibrium constants of axial coordination reaction were measured by visible spectra techniques.The changes of standard molar enthapy Δ rH o m and standard molar entropy Δ rS o m of reaction were obtained from the plot of lnK vs 1/T. The experimental results showed that both Δ rH o m and Δ rS o m of coordination reaction were negative values.
