Structure Investigation of New Condensation Products of 1,2,3,3-Tetramethylindolenium with Metoxysubstituted Diformylphenols
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New spiropyran salts in the row of 1,3,3-trimethylspiro-indoline-2,2'-[2Н]-chromene are prepared and their structures are investigated. Molecular structures of obtained compounds are confirmed by X-ray diffraction and NMR spectroscopy. An open merocyanine isomer is found to be the most stable structure for one of these compounds.
Keywordsspiropyran photochromism molecular switch X-ray diffraction analysis NMR spectroscopy
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