Additions and Corrections: Crystal and Molecular Structure of the Free Base Porphyrin, Mesoprophyrin IX Dimethyl Ester (Journal of the American Chemical Society (1979) 101(24) (7437))

On p 5365 structures for 1 and 2 should be interchanged. In Table VI the coefficient A for the least-squares planes 1 through 6 should be multiplied by 10. A corrected Table VII is given below. The transannular separations for the title compound are no longer significantly different from those in other free base porphyrins. Thus the discussion of these differences, both in this paper and in Caughey, W. S.; Ibers, J. A. J. Am. Chem. Soc. 1977, 99, 6639-6645, is no longer applicable.