Structural investigation of 5,10-A2B2-type porphyrins Palladium(II) and zinc(II) complexes of 5,10-dibromo-15,20-bis(4-methylphenyl)porphyrin.

Abstract

The analysis of [5,10-dibromo-15,20-bis(4-methylphenyl)por- phyrinato]palladium(II), [Pd(C 34 H 22 Br 2 N 4 )], and [5,10-di- bromo-15,20-bis(4-methylphenyl)porphyrinato](methanol)- zinc(II), [Zn(C 34 H 22 Br 2 N 4 )(CH 4 O)], reveals a small but localized influence of the bromine residues on the conforma- tion of the macrocycle. A comparison of the 5,10-dibromo substituent pattern with literature data for 5,15-dibromo- porphyrins shows similar in-plane distortions in both but a different mix of out-of-plane distortion modes for the different regiochemical arrangements.