Abstract
Tricarbonylchromium π-complexes of αβγδ-tetraphenylporphin and its Cr(II), Mn(III), Ni(II), Cu(II), and Zn(II) chelates have been prepared. The complexes vary in stability with the Zn compound being the most stable. The complexes have been studied by their visible and i.r. spectra and their n.m.r. spectra where applicable. A study of the CO stretching vibrations in the i.r. shows no appreciable interaction between the two metals and arguments are made to show that this lack of interaction is due to absence of π interactions between the porphin and phenyl ring systems.
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