| 摘要 |
Compounds of the general formula I <IMAGE> I where the A radicals are, independently of one another, <IMAGE> where the rings B and C can also, independently of one another, be substituted by C1-C4-alkyl, C1-C4-alkoxy, nitro, hydroxysulfonyl, benzoyl or a fused-on benzo ring, R is hydrogen or methyl, and the two hydrogen atoms on the nitrogens Can be replaced by copper, nickel, vanadyl, magnesium, AlCl or zinc, are suitable as IR-absorbers.
|
