1 WXP 5,10,15-triphenylporphyrin cpntaining Fe 1.000 2 MQP [5,10,15,20-tetraphenylporphyrinato(2-)-kappa~4~N~21~,N~22~,N~23~,N~24~]iron 0.878 3 WUP 5,15-diphenylporphyrin containing Fe 0.860 4 J7U Chromium-5,10,15,20-tetraphenylporphyrin 0.840 5 J7X Mn-5,10,15,20-tetraphenylporphyrin 0.840 6 J83 Co-5,10,15,20-tetraphenylporphyrin 0.840 7 WYP 5-ethynyl-10,20-diphenylporphyrin containing Fe 0.822 8 SMU [5,15-diphenylporphyrinato(2-)-kappa~4~N~21~,N~22~,N~23~,N~24~]manganese 0.818 9 WVP 5,15-bisethynyl-10,20-diphenylporphyrin containing Fe 0.787 10 83L 10,20-diphenyl-5,15-diaza-porphyrin containing Fe 0.778 11 7OH Fe-tetra(4-pyridyl)porphyrin 0.769 12 9D7 [4-(15-phenylporphyrin-5-yl-kappa~4~N~21~,N~22~,N~23~,N~24~)benzoato(2-)]zinc 0.766