Photoisomerization of 2,3-diphenylcyclopropane-1-carboxylic acid derivatives?

Photochemical & Photobiological Sciences Pub Date: 2003-08-28 DOI: 10.1039/B306337M

Abstract

Contrary to what is known about cis-1,2-diphenylcyclopropane and its derivatives, we find that they have triplet energies of ca. 311 kJ mol?1, do not undergo intersystem crossing upon direct excitation, undergo the less common adiabatic photoisomerization to the corresponding trans isomers, and show emission from excited 1,3-diradical intermediates.

Graphical abstract: Photoisomerization of 2,3-diphenylcyclopropane-1-carboxylic acid derivatives
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