Synthesis and structural characterization of nonplanar tetraphenylporphyrins with graded degree of β-ethyl substitution

Article abstract of DOI:10.1016/0040-4039(95)02405-0

Tetraphenylporphyrins bearing two, four, and six β-ethyl groups have been synthesized by mixed condensation of benzaldehyde with diethylpyrrole and pyrrole. Investigation of all isomers by spectroscopy and X-ray crystallography shows a series of porphyrins with graded degree of nonplanarity depending on number and position of the ethyl substituents.