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Citation: Chen Hong-Wei, Zhu Zhi-Ang, Ruan Wen-Juan, Zhang Zhi-Hui, Chen Zheng-Hua, Chen Rong-Ti. Thermodynamic Study of Coordination Reaction of Zinc Tetraphenylporphyrins with Substituted Lmidazoles[J]. Acta Physico-Chimica Sinica, ;1996, 12(06): 568-572. doi: 10.3866/PKU.WHXB19960619 shu

Thermodynamic Study of Coordination Reaction of Zinc Tetraphenylporphyrins with Substituted Lmidazoles

1.
Department of Chemsitry,Nankai University,Tianjin 300071

Received Date: 18 October 1995
Available Online: 15 June 1996

Equilibrium constants for reactions of ZnT(p-X)PP(para-substituted zinc tetraphenylporphyrins) with ligands of the substituted imidazole in CH2Cl2 and several other solvents have been determined by visible spectral techniques, and Rose-Dra method. Electronic effects in metalloporphrins and effects of ligands, temperature and solvents were investigated. It was found that equilibrium constants for reactions of ZnT(p-X)PP with ligands follow Hammett equation. The changes of standard molar enthalpy△rHm and the changes of standard molar entropy △rSm of the reactions were obtainedfrom the plots of lnK vs. 1/T.
- Para-substituted zinc tetraphenylporphyrin,
- Substituted imidazole,
- UV-visible spectrum,
- Equilibrium constants,
- Coordination reaction
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