Coordinating Properties of Co(II) and Zn(II) Complexes with Sterically Hindered Porphyrins |
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| Authors: | Pukhovskaya S G Guseva L Zh Semeikin A S Kumeev R S Golubchikov O A |
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| Institution: | (1) Institute of Solution Chemistry, Russian Academy of Sciences, ul. Akademicheskaya 1, Ivanovo, 153045, Russia;(2) Ivanovo State University of Chemical Technology, Ivanovo, Russia |
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| Abstract: | Cobalt(II) and zinc(II) complexes with 5,15-di(o-methoxyphenyl)-3,7,13,17-tetramethyl-2,8,12,18-tetra-n-buthylporphyrin and its capped analogues, where the MN4 reaction site is shielded by bridging groups containing m-phenylene and dimethoxy-substitutedp-phenylene fragments, were synthesized. Equilibrium constants of additional coordination of pyridine and N-methylimidazole by these metalloporphyrins were determined at 298 K. It was found that steric distortion of the porphyrin core destabilizes extra complexes. |
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