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Effect of alkylation of the pyrrole rings of the porphyrin molecule on the vibronic spectra

✍ Scribed by L. L. Gladkov; A. T. Gradyushko; K. N. Solov'ev; A. S. Starukhin; A. M. Shul'ga

Publisher
Springer US
Year
1978
Tongue
English
Weight
506 KB
Volume
29
Category
Article
ISSN
0021-9037

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## Abstract The proton NMR spectra of tetraphenylporphyrin, octaethylporphyrin and the analogous chlorins (7,8‐dihydroporphyrins) are presented, and the chemical shift changes on chlorin formation are interpreted using a ring current model. In these compounds a general 10% reduction in the ring cur