Pub No:
271
Title:
Porphocyanine: An Expanded Tetrapyrrolic Macrocycle
Authors:
David Dolphin, Rettig, S.J., Tang, H., Wijesekera, T., and Xie, L.Y.
Journal:
J. Am. Chem. Soc.
Year:
1993
Pages:
115, 9301-9302
Abstract:
Self-condensation of a 5,5'-bis(aminomethyl)dipyrromethane with the loss of ammonia followed by aerial oxidation gives a new 22 π-electron aromatic system called porphocyanine. Octaethylporphocyanine (I) has a typical porphyrin-like absorption spectrum with a Soret band at 457 nm and the longest wavelength absorption at 797 nm. Upon protonation the Soret band sharpens and the long wavelength band exhibits a hypsochromic shift. A single crystal x-ray structure of the zinc complex II shows the porphocyanine molecule to be completely flat.

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