ESR Studies on the Stability of Imidazolate and r,r'-Bipyridinate Bridged Heteropolynuclear Complexes

Chem. J. Chinese Universities ›› 1990, Vol. 11 ›› Issue (11): 1186.

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ESR Studies on the Stability of Imidazolate and r,r'-Bipyridinate Bridged Heteropolynuclear Complexes

Chen Dong¹, Tang Wenxia¹, Dai Anbang¹, Hang Shiying², Wang Huaqin²

1. Coordination Chemistry Institute, Nanjing University, Nanjing, 210008;
2. Center of Material Analysis, Nanjing University, Nanjing

Received:1989-03-06 Online:1990-11-24 Published:1990-11-24

Abstract

Abstract: The determination of the pHdependent ESRspectra of some imidazolate and r,r'-bipyridi-nate bridged heteropolynuclear complexes:Co-Im-Cu, Co-Im-Cu-Im-Co and Co-(r,r'-bpy)-Cu have been carried out and show that the imidazolate bridged dinuclear and trinuclear cations exist as major species in .the solution only between pH: 7. 8-8. 5,but r,r'-bipyridinate bridged cation exists in solution in a wider pHrange (pH>6). At low pHthe imidazolate and r,r'-bipyridinate bridge are broken and eventually free Cu²⁺ion forms.

Key words: Lmidazolate bridged complex, Stability, ESR

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Chen Dong, Tang Wenxia, Dai Anbang, Hang Shiying, Wang Huaqin. ESR Studies on the Stability of Imidazolate and r,r'-Bipyridinate Bridged Heteropolynuclear Complexes[J]. Chem. J. Chinese Universities, 1990, 11(11): 1186.

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ESR Studies on the Stability of Imidazolate and r,r'-Bipyridinate Bridged Heteropolynuclear Complexes

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