1962
DOI: 10.1021/ja00861a033
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The Correlation of Solvent Effects on the Stereoselectivities of Diels-Alder Reactions by Means of Linear Free Energy Relationships. A New Empirical Measure of Solvent Polarity

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Cited by 280 publications
(127 citation statements)
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“…Many empirical parameters have been suggested to compare the solvent effect in chemical reactions, such as Kosower's Z, 1 Dimroth's ET, 2 Y, 3 and Ω. 4 The Z and ET values are parameterized using the charge-transfer absorption band of the probe molecule, with which the solvent molecule forms an adduct, in the solvent. The Y value is defined using the rate constant of the solvolysis reaction of t-butyl chloride.…”
Section: Introductionmentioning
confidence: 99%
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“…Many empirical parameters have been suggested to compare the solvent effect in chemical reactions, such as Kosower's Z, 1 Dimroth's ET, 2 Y, 3 and Ω. 4 The Z and ET values are parameterized using the charge-transfer absorption band of the probe molecule, with which the solvent molecule forms an adduct, in the solvent. The Y value is defined using the rate constant of the solvolysis reaction of t-butyl chloride.…”
Section: Introductionmentioning
confidence: 99%
“…The solubility parameter δ, which is defined by the molar energy of evaporation and the molar volume of solvent, is also important to understand the solvent effect. 4 These parameters mainly represent the properties of solvents as the electron acceptor, and it is known that they correlate with Mayer's acceptor number (AN). 5 The AN value is defined as the relative chemical shift of 31 P NMR of trimethylphosphine oxide in a solvent, and is widely used as a measure of the accepting property of the solvent molecule when combined with the Gutmann's donor number (DN), 6,7 which is a measure of the donating property.…”
Section: Introductionmentioning
confidence: 99%
“…[3], из-учившими кинетику присоединения циклопентадиена к метилакрилату в различных растворителях (реакция Дильс-Альдера). В ходе этой реакции образуется в различных соотношени-ях эндо-и экзо-изомеры продуктов присоединения, причем соотношение этих изомеров существенно зависит от природы растворителя;…”
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“…Параметры Ω были успешно ис-пользованы [3] для нахождения корре-ляции данных о сольволизе некоторых арилсульфонатов и данных о пере-группировке бензоилазидов в различ-ных средах с природой растворителя.…”
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