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Tetraphenylporphyrin molecules containing heteroatoms other than nitrogen: 8 —A carbon‐13 NMR study
Author(s) -
Abraham Raymond J.,
Leonard Paul,
Ulman Abraham
Publication year - 1984
Publication title -
organic magnetic resonance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0030-4921
DOI - 10.1002/mrc.1270220908
Subject(s) - tetraphenylporphyrin , heteroatom , protonation , chemical shift , chemistry , molecule , aromaticity , nitrogen , carbon fibers , carbon 13 nmr , nmr spectra database , porphyrin , crystallography , photochemistry , spectral line , stereochemistry , organic chemistry , ring (chemistry) , materials science , physics , astronomy , ion , composite number , composite material
The 13 C NMR spectra of new hetero‐substituted tetraphenylporphyrin (TPP) molecules have been studied. It was found that most of the carbon chemical shifts are similar to those found in TPP. The similar chemical shifts of the different β‐carbons in S 2 TPP and in Se 2 TPP free bases and, moreover, the considerable downfield shift of the α‐carbons of the S(Se)‐rings on protonation are in agreement with the previously suggested theory of inner and outer aromaticity in these porphyrins.