Organic Dyes
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ChemInform Abstract: Chemistry of Pyrrole Pigments. Part 97. Synthesis, Stereochemistry, and Solvatochromic Effects of a 1-(Dipyrrinon-9-yl)-3-(dipyrrinon-9- ylidene)-1-propene.
First published: April 30, 1996
Abstract
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ChemInform Abstract
The title pyrrole pigment (IV) is synthesized by acid catalyzed condensation of the two dipyrrinone fragments (I) and (II). The configuration of (IV) is established by 2D 1H NMR experiments. The pronounced solvatochromic effect of (IV), which has a cyclic helical geometry, is explained by solvent induced conformational changes.
