Title

Sterically Strained Porphyrins—Influence of Core Protonation and Peripheral Substitution on the Conformation of Tetra‐meso‐, Octa‐β‐, and Dodeca‐Substituted Porphyrin Dications

Document Type

Article

Publication Date

1-3-1995

Abstract

The saddle‐shaped porphyrin with the largest deviation from planarity observed to date is found in the crystal structure of [H4obrtpp][CF3COO]2 · 0.5 CHCl3 (H2obrtpp = octabromotetraphenylporphyrin). The pyrrole rings in the porphyrin are twisted by 62° with respect to each other, and the β‐pyrrole C atoms are displaced by over 1.5 Å from the mean plane of the porphyrin ring. This extreme distortion is caused by the bulky peripheral substituents on the porphyrin ring and the four protons at the core of the structure. Copyright © 1994 by VCH Verlagsgesellschaft mbH, Germany

Publication Source (Journal or Book title)

Angewandte Chemie International Edition in English

First Page

2485

Last Page

2487

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