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Crystal Engineering on Imidazolone-Annellated Triphenedioxazine Pigments

3 Crystal Engineering on Imidazolone-Annellated Triphenedioxazine Pigments [Pg.347]

The determination of crystal structures of imidazolone-anneUated triphenedioxazine pigments is chaUenging, since the insolubility of the compounds prevents the growth of single crystals suitable for X-ray structure analyses. Recrystallization [Pg.347]

Therefore, the crystal structures of 4b (dimethyl derivative) and 4d (Pigment Blue 80) were determined from X-ray powder diagrams. [Pg.348]



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