Crystal Engineering on Organic Pigments

Pigment Red 170
P2 1 /n, Z = 4, a = 10.8222 Å, b = 24.169 Å, c = 8.3623 Å, � = 100.576°
R wp = 7.7%, R p = 5.4%, red. � 2 = 8.0.
X
N
H 2
N
N
O
H
O
O
X
H
N
O
X = CH 3 , F, Cl, Br, ...
(new compounds)
[M. U. Schmidt, D.W.M. Hofmann, C. Buchsbaum, H. J. Metz, Angew. Chem. Int. Ed. 45 (2006), 1313-1317]
CH 3
CH 2