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Axial ligation of nitrogenous bases to five-coordinate chloro-meso-tetraphenylporphyrinatochromium(III)
Authors:Toshihiko Ozawa  Akira Hanaki
Affiliation:National Institute of Radiological Sciences, 9-1, Anagawa-4-chome, Chiba-shi 260, Japan
Abstract:The axial ligations of nitrogenous bases to the five-coordinate chloro-meso-tetraphenylporphyrinatochromium(III) [Cr(III)(TPP)(Cl)] were studied in a non-coordinating solvent, dichloromethane (CH2Cl2), by spectrophotometric methods. A correlation exists between log K for the axial ligation:
/></figure> and p<em>K</em><sub>a</sub> for the N-donor ligand. This correlation suggests that ligand to metal σ bonding contributes to the complex formation, rather than does metal to ligand π back-donation.</td>
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Keywords:Authors to whom correspondence should be addressed.
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