The Electrolyte Effects in the Hydration of Isobutene^1,2

Pressure Effect and Mechanism in the Acid-Catalyzed Hydration of Propylene and Isobutylene

“…The entropy change for reactioil [ I ] is roughly analogous to the entropy changes for the proton transfer reactions The entropy change of this reaction is undoubtedl\~ negative because of the loss of freedoiu of the water molecule, unless there is a considerable decrease in the electrostatic interaction with the solvent when the water molecule adds, which seems un1il;ely. The entropy change of reaction [2] is therefore the sum of a positive and a negative term, and the sign is a t present unpredictable. \lie note, however, that a negative entropy of activatioil is predicted only if the transition state is [olefin.I-If.H20]+.…”

Reversible hydration of 1,3-cyclohexadiene in aqueous perchloric acid

“…The hydration of alkenes in aqueous acidic media has been investigated by numerous workers during the previous two decades. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] To date, the hydration of alkenes containing no additional functional groups may be classified by one of the three following descriptive types. Table I presents a comparative compilation of mechanistic criteria for these three reactant types.…”

The kinetics and mechanism of the reaction of 5-fluorocytosine with hydroxylamine

“…This step is analogous to the predominantly specific acid-catalysed hydration of 01efins.~'. 28 Although it is recognised that general acid-catalysis * As shown in the kinetic analysis section, catalysis of this step by the proton is not detectable. Average k, = 9.2 f 1.5 x…”