Relationship between the log POW and the number of carbon atoms (nC) for the series of ortho and meta Mn(III) N-alkylpyridylporphyrins. Full squares (ortho isomers) and triangles (meta isomers) present experimental values (determined in water/n-butanol system and converted to water/n-octanol system using equation 2) while empty squares and triangles present predicted values, respectively. The porphyrins are from bottom to top: MnTM-2,3-PyP, MnTE-2,3-PyP, MnTPr-2,3-PyP, MnTnBu-2,3-PyP, MnTnHex-2,3-PyP, MnTnHep-2-PyP, MnTnOct-2,3-PyP.