Studies of Stability of Co—N Bond on the VB12 Model Molecule

Abstract

Abstract: Vitamin B₁₂ model molecule, dicyano hexamethyl-N-(3-imidazoly)propylamido cobyrinates perchlorate 4b—4f were synthesized and treated with acidic buffers in methanol, and the ring was opened to give compounds 5b—5f. UV-Vis spectra were determined in buffers with different pHvalues, and equilibrium constants of Co—N bonds were calculated. The strength of coordination bonds between Natom in the side chain of cobyrinates and Co atom was in the order of 4d>4f>4c>4e>4b.

Key words: Vitamin B₁₂, Model molecule, UV-Vis spectra, Equilibrium constants

CLC Number:

O563

TrendMD:

FENG Ya-Qing, ZHANG Xiao-Dong, ZHANG Wei-Hong . Studies of Stability of Co—N Bond on the VB₁₂ Model Molecule[J]. Chem. J. Chinese Universities, 1998, 19(4): 550.

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Studies of Stability of Co—N Bond on the VB₁₂ Model Molecule

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