Abstract
The synthesis of the Cu, Ni, and Zn complexes of cis-1,2-bis(octaethyl-5-porphyrinyl)ethylene has been carried out and their transformation into the corresponding trans isomers has been investigated under various conditions. The crystal and molecular structure of the Ni complex of trans-1,2-bis(octaethyl-5-porphyrinyl)ethylene was determined by x-ray structural analysis. It was shown that the Zn and Ni complexes of the cis isomer were readily converted into the trans isomers in chloroform. A stepwise introduction of Ni atoms into the trans dimer was discovered on heating it with Ni(OAc)2 in DMF. The conversion of the Zn complex of the cis dimer into the trans dimer was facilitated on adding pyridine.
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