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Fossil porphyrins: uncomplexed chlorins in a triassic sediment

✍ Scribed by M Blumer; G.S Omenn

Book ID
118882592
Publisher
Elsevier Science
Year
1961
Tongue
English
Weight
776 KB
Volume
25
Category
Article
ISSN
0016-7037

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The first representatives of hydroxamic acids in the series of naturally-occurring chlorins were synthesised and their oxidation to porphyrins was studied.

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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