Auxochrome
any radical or group of atoms that intensifies the color of a substance.
historical examples
while phenyldisulphide is colorless, when an auxochrome group is added, such as nh2, the compound is colored.
synthesis of 2-methyl-4-selenoquinazolone, 2-phenylbenzoselenazole, and its derivatives y-gwan chen
the selenium atom in a cyclic compound also acts like an auxochrome.
synthesis of 2-methyl-4-selenoquinazolone, 2-phenylbenzoselenazole, and its derivatives y-gwan chen
this brings selenophene more akin to pyrrole than thiophene, but the group -nh- in the molecule of pyrrole is an auxochrome.
synthesis of 2-methyl-4-selenoquinazolone, 2-phenylbenzoselenazole, and its derivatives y-gwan chen
in other words, an auxochrome in addition to the chromoph-r- group transforms a colorless chromogen into a colored one.
synthesis of 2-methyl-4-selenoquinazolone, 2-phenylbenzoselenazole, and its derivatives y-gwan chen
noun
a group of atoms that can be attached to a chromogen to convert it into a dye
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