1 WUP 5,15-diphenylporphyrin containing Fe 1.000 2 WYP 5-ethynyl-10,20-diphenylporphyrin containing Fe 0.949 3 SMU [5,15-diphenylporphyrinato(2-)-kappa~4~N~21~,N~22~,N~23~,N~24~]manganese 0.947 4 WVP 5,15-bisethynyl-10,20-diphenylporphyrin containing Fe 0.902 5 83L 10,20-diphenyl-5,15-diaza-porphyrin containing Fe 0.897 6 9D7 [4-(15-phenylporphyrin-5-yl-kappa~4~N~21~,N~22~,N~23~,N~24~)benzoato(2-)]zinc 0.878 7 WXP 5,10,15-triphenylporphyrin cpntaining Fe 0.860 8 J7U Chromium-5,10,15,20-tetraphenylporphyrin 0.720 9 J7X Mn-5,10,15,20-tetraphenylporphyrin 0.720 10 J83 Co-5,10,15,20-tetraphenylporphyrin 0.720