Formula: C7H5NO. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 1,2-Benzisoxazole, is researched, Molecular C7H5NO, CAS is 271-95-4, about Physical organic chemistry of benzisoxazoles. II. Linearity of the Broensted free energy relation for the base-catalyzed decomposition of benzisoxazoles. Author is Kemp, D. S.; Casey, Martha L..
The catalytic constants for the reactions of 55 of the possible pairs of eight substituted benzisoxazoles with 12 tertiary amines in water at 30° vary over a range of 105, yet are quant. approximated by the equation: log kcat = 0.721pKamine + 0.614(14 – pKcyanophenol) – 11.9. An examination of the above catalytic constants together with those involving water or hydroxide ion, fails to provide evidence for a change in selectivity with reactivity for the base catalyzed E2 elimination of benzisoxazoles, despite a total variation in rate of 1011. Kinetic isotope effects for three 3-2H-substituted benzisoxazoles showed no significant variation over a range of catalytic constant values of 109. The generality and implications of these observations are discussed.
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Reference:
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI