Structural investigation of 5,10‐A2B2‐type porphyrins: palladium(II) and zinc(II) complexes of 5,10‐dibromo‐15,20‐bis(4‐methylphenyl)porphyrin

The analysis of 5,10‐dibromo‐15,20‐bis(4‐methylphenyl)porphyrinato]palladium(II), Pd(C₃₄H₂₂Br₂N₄)], and 5,10‐dibromo‐15,20‐bis(4‐methylphenyl)porphyrinato](methanol)zinc(II), Zn(C₃₄H₂₂Br₂N₄)(CH₄O)], reveals a small but localized influence of the bromine residues on the conformation of the macrocycle. A comparison of the 5,10‐dibromo substituent pattern with literature data for 5,15‐dibromoporphyrins shows similar in‐plane distortions in both but a different mix of out‐of‐plane distortion modes for the different regiochemical arrangements.