Application of two‐dimensional NMR to the structure determination of an unsymmetrical monosubstituted bisporphyrin

Abstract

AbstractThe complete assignment of 1H and 13C data of an unsymmetrical monosubstitute bisporphyrin based on an extensive application of two‐dimensional 1H1H, 1H13C and 13C‐13C shift spectroscopy is described. The 1H1H shift correlation through dipolar interaction (2D NOESY) was essential to prove the connection of the alkyl fragments and to distinguish protons spatially close but belonging to different units. The additive structural increments method allowed the assignment of the quatenary carbons of tolyl residues.