Investigation of a new product of a condensation reation between 1,2,3,3-tetramethylindolenilium perchlorate and 2,6-diformyl-4-methyl-phenol

A new spiropyran salt in which the positive charge is localized on the nitrogen atom of the indoline moiety and the negative charge is localized on the ClO4 (-) group is synthesized. The structure of the compound is determined by the single crystal X-ray diffraction analysis.