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Crystal Engineering on Organic Pigments

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Diaryl pigments:<br />

Understanding the crystal structures<br />

Compd. Col. strength C<strong>on</strong>form. Packing<br />

P. Yellow 12 100 % twisted herring b<strong>on</strong>e P2 1/c, Z = 4<br />

P. Yellow 13 141 % planar<br />

P. Yellow 14<br />

Twisted c<strong>on</strong>formati<strong>on</strong><br />

preferred for single molecules<br />

(106 %) planar<br />

layer<br />

P. Yellow 83 138 % planar herring b<strong>on</strong>e P2 1/c, Z = 2<br />

Planar c<strong>on</strong>formati<strong>on</strong><br />

unfavorable for single molecules<br />

[M.U. Schmidt, R.E. Dinnebier, H. Kalkhof, J. Phys. Chem. B 111 (2007), 9722-9732]<br />

P1, Z = 1

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