Browsing by Subject Quang hóa Hydro

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    • Thesis

    • Authors: Cen, Yana (2006)

    • Conformational effects on photocyclization of various 2-alkoxy-3-alkyl phenyl ketones have been investigated. Actual rate constants for triplet reaction were measured as alkyl substituent was varied, the extent of their increase provides direct measures of conformational equilibria. When these rate constants get large enough, photocyclization can be employed as an internal clock for fast reactions, especially in the solid state. Biradical geometries are also constrained, changes in their lifetimes and product ratios were directly correlated with changes in geometry. Photoinduced carbon-halogen bond cleavage of a series of a-(haloethoxy)acetophenons and (3-(haloethoxy)propiophenones h...