Time-resolved resonance Raman and molecular orbital studies of the structures of the transient species involved in the photochromic reaction of 2, 2′-spirobi [2H-1- …

S Hashimoto, A Shimojima, T Yuzawa, H Hiura…

Index: Hashimoto, Syuichi; Shimojima, Atsuhiko; Yuzawa, Tetsuro; Hiura, Hidefumi; Abe, Jiro; Takahashi, Hiroaki Journal of Molecular Structure, 1991 , vol. 242, # 1 p. 1 - 14

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Citation Number: 21

Abstract

Abstract Resonance Raman spectra of the transient species of 2, 2′-spirobi [2H-1- benzopyran] in various solvents reveal that at least two isomers exist in solution, the relative abundance of which depends on the polarity and hydrogen-bond donor ability of the solvent. Vibrational assignment of the transient species based on 13 C substitutions shows that the Raman bands mainly attributable to the vibrations of the open benzopyran part are ...