Crystal Engineering on Organic Pigments
Crystal Engineering on Organic Pigments
Crystal Engineering on Organic Pigments
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Polymorph screening<br />
without knowledge of the crystal structure<br />
CH 3<br />
Cl<br />
N N<br />
O<br />
O<br />
S<br />
H O<br />
O<br />
2<br />
Ca 2+<br />
Until 1997: Only 1 polymorphic form<br />
No crystal structure<br />
Compound known since 1902<br />
[Deutsches Reichspatent Nr. 145908<br />
by Griesheim-Elektr<strong>on</strong> (Frankfurt)]<br />
(Ba 2+ salt: used for<br />
newspaper printings ...)<br />
Then we started syntheses and crystallizati<strong>on</strong>s ...
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