Premium
Solution phase 1 H and 13 C‐NMR studies of some 1,4,8,11,15,18,22,25‐octa‐alkylphthalocyanines
Author(s) -
Cook Michael J.,
Cracknell Steven J.,
Moore Geoffrey R.,
Osborne Michael J.,
Williamson David J.
Publication year - 1991
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.1260291014
Subject(s) - chemistry , tautomer , nmr spectra database , carbon 13 nmr satellite , spectral line , carbon 13 nmr , proton nmr , nuclear magnetic resonance spectroscopy , metal , crystallography , analytical chemistry (journal) , nuclear magnetic resonance , fluorine 19 nmr , stereochemistry , organic chemistry , physics , astronomy
Solution state 1 H NMR and 13 C NMR spectral data are reported for 1,4,8,11,15,18,22,25‐octahexylphthalocyanine, its zinc metallated analogue, and 1,4,8,11,15,18,22,25‐octanonylphthalocyanine. Full 1 H and 13 C NMR signal assignments for these compounds have been made using one and two dimensional techniques supported by T 1 measurements. 13 C NMR spectra of the two metal‐free derivatives show only three signals in the aromatic region at 100 MHz but the expected four resonances at 22.5 MHz. The apparent absence of one of these at 100 MHz is ascribed to a fast exchange process, originating from NH ⃛N⇌N ⃛HN tautomerism.