Free Acid Porphyrin and Its Conjugated Monoanion | Zendy

Braun Jürgen | Zendy; Hasenfratz Christian | Zendy; Schwesinger Reinhard | Zendy; Limbach HansHeinrich | Zendy

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Free Acid Porphyrin and Its Conjugated Monoanion

Author(s) -

Braun Jürgen,

Hasenfratz Christian,

Schwesinger Reinhard,

Limbach HansHeinrich

Publication year - 1994

Publication title -

angewandte chemie international edition in english

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.831

H-Index - 550

eISSN - 1521-3773

pISSN - 0570-0833

DOI - 10.1002/anie.199422151

Subject(s) - phosphazene , porphyrin , conjugated system , acetonitrile , chemistry , proton , photochemistry , nitrogen , proton nmr , nuclear magnetic resonance spectroscopy , stereochemistry , organic chemistry , polymer , physics , quantum mechanics

An absolute p K a value of about 36 in acetonitrile is obtained for porphyrin from its reaction with phosphazene bases. The monoanion 1 is stable in aprotic solvents and was characterized by NMR and UV/ Vis spectroscopy. The remaining central proton in the monoanion migrates between the four nitrogen atoms much faster than the two protons in the parent compound.

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