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Re‐examination of the 13 C NMR spectra of synthetic chlorins
Author(s) -
Stolzenberg Alan M.,
Stershic Matthew T.
Publication year - 1987
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260250316
Subject(s) - chemistry , pyrrole , proton nmr , proton , spectral line , carbon 13 nmr , nmr spectra database , nuclear magnetic resonance , computational chemistry , stereochemistry , organic chemistry , nuclear physics , physics , astronomy
The 13 C NMR spectra of the synthetic chlorins H 2 (OEC), Ni(TMC) and H 2 (TPC) have been re‐examined. Evidence from single‐frequency proton decoupled, proton coupled, and 2D 13 C‐ 13 C INADEQUATE experiments show that the previous assignments of the meso ‐substituted chlorins were incorrect. Corrected assignments establish that the α‐pyrroline carbons of chlorins occur at lower fields (150–175 ppm) than the α‐pyrrole carbons.