| abstract |
Clathrates of bis[6-hydroxy-4-methyl-5-(3-methyl-imidazolium-1-yl)-3-(phen-4-ylazo)p yridin-2-one]ethylene with aromatics of the general formula I where R1 is C1-C5-alkyl, C1-C5-hydroxyalkyl, C1-C5-alkoxy, C1-C5-hydroxyalkoxy, C1-C10-alkyl which is interrupted by 1, 2 or 3 non-neighboring oxygen atoms and is unsubstituted or substituted by hydroxyl, C1-C10-alkoxy which is interrupted by 1, 2 or 3 non-neighboring oxygen atoms and is unsubstituted or substituted by hydroxyl, or is C1-C6-alkanoyl, hydroxy, carboxyl, C1-C6-alkoxycarbonyl, phenylcarbonyl or C1-C6-alkenyl and R2 is R1, hydrogen or phenoxy, a process for their preparation and their use for the preparation of formulations of the dye. |