Acta Phys. -Chim. Sin. ›› 1994, Vol. 10 ›› Issue (09): 831-837.doi: 10.3866/PKU.WHXB19940912

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Studies on the Production and Dissociation of Coenzyme B12 Models by Electrochemistry and Spectroelectrochemistry(II)

Zheng Guo-Dong, Yan Yan, Wang Ying, Huang Chu-Bao, Gao De, An Qing-Da   

  1. Department of Chemistry,Jilin University,Changchun 130023|Department of Chemical Engineering,Hunan University,Changsha 410082|Dalian Institute of Light Industry,Dalian 116034
  • Received:1993-08-16 Revised:1994-05-03 Published:1994-09-15
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Abstract:

The reaction of CoTPP (cobalt tetrophenylporphyrin) with various alkyl bromides [CH3CH2Br; CH3(CH2)3Br; CH3(CH2)7Br; CH3(CH2)11Br; CH3(CH2)15Br] were studied by cyclic voltammogram. The reaction of [Co(I )TPP]- with alkyl bromide formed coenzym B12 moddel compound containing a cobalt-carbon bond. The formation rate constants are 2.43; 16.73; 28.30; 35.05; 42.36 mol-1•L•s-1 respectively. The relation between the chain length of alkyl bromide the rate constants and the stability of alkyl cobalt porphyrin negtive ion were discussed.

Key words: Coenzyme B12 model compound, Electrochemistry, Cobalt prphyrin