1,3-Cycloaddition of the nickel meso-cyanooctaethylporphyrin N-oxide complex to olefins. Molecular and crystal structure of a double cycloaddition product to 2,5-norbornadiene

Abstract

Starting from the nickel meso-formyloctaethylporphyrin oxime complex, the meso-cyanooctaethylporphyrin N-oxide complex was synthesized for the first time. The new complex enters into 1,3-cycloaddition to olefins. The double addition of the nitrile oxide to 2,5-norbornadiene affords a porphyrin dimer, whose structure was established by X-ray diffraction analysis.