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- The Taft equation is a linear free energy relationship (LFER) used in physical organic chemistry in the study of reaction mechanisms and in the development of quantitative structure–activity relationships for organic compounds. It was developed by in 1952 as a modification to the Hammett equation. While the Hammett equation accounts for how , inductive, and resonance effects influence reaction rates, the Taft equation also describes the steric effects of a substituent. The Taft equation is written as: where is the ratio of the rate of the substituted reaction compared to the reference reaction, ρ* is the sensitivity factor for the reaction to polar effects, σ* is the polar substituent constant that describes the field and inductive effects of the substituent, δ is the sensitivity factor for the reaction to steric effects, and Es is the steric substituent constant. (en)
- Р. Тафтом был предложен ряд уравнений для количественного описания влияния соседних заместителей на реакционноспособность химического соединения по исследуемой функциональной группе. Эти уравнения часто используются для определения механизма реакции. (ru)
- A Equação de Taft foi desenvolvida a partir dos trabalhos de Robert W Taft Jr. (1922-1996) na década de 50. Ele foi professor emérito da Universidade da Califórnia (Irvine) e anteriormente fez parte do Departamento de Química da Universidade do Estado da Pensilvania, sendo uma das figuras mais conhecidas e respeitadas no campo da físico-química orgânica. (pt)
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- Р. Тафтом был предложен ряд уравнений для количественного описания влияния соседних заместителей на реакционноспособность химического соединения по исследуемой функциональной группе. Эти уравнения часто используются для определения механизма реакции. (ru)
- A Equação de Taft foi desenvolvida a partir dos trabalhos de Robert W Taft Jr. (1922-1996) na década de 50. Ele foi professor emérito da Universidade da Califórnia (Irvine) e anteriormente fez parte do Departamento de Química da Universidade do Estado da Pensilvania, sendo uma das figuras mais conhecidas e respeitadas no campo da físico-química orgânica. (pt)
- The Taft equation is a linear free energy relationship (LFER) used in physical organic chemistry in the study of reaction mechanisms and in the development of quantitative structure–activity relationships for organic compounds. It was developed by in 1952 as a modification to the Hammett equation. While the Hammett equation accounts for how , inductive, and resonance effects influence reaction rates, the Taft equation also describes the steric effects of a substituent. The Taft equation is written as: (en)
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- Equação de Taft (pt)
- Taft equation (en)
- Уравнение Тафта (ru)
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