Structure of photochromic 1′,3′,3′-trimethyl-7-methoxyspiro (lndoline-2,2′-[2H-1] benzopyran)
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X-ray diffraction structural analysis has established the structure of photochromic 1′,3′,3′-trimethyl-7-methoxyspiro (indoline-2,2′-[2H-1]benzopyran) and showed that the Cspiro-O bond, which is cleaved upon photoexcitation, is already extended in the ground state.
KeywordsStructural Analysis Benzopyran
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