In chemistry, the selection rule (also known as the transition rule) formally restricts certain reactions, known as spin-forbidden reactions, from occurring due to a required change between two differing quantum states. When a reactant exists in one spin state and the product exists in a different spin state, the corresponding reaction will have an increased activation energy when compared to a similar reaction in which the spin states of the reactant and product are isomorphic. As a result of this increased activation energy, a decreased rate of reaction is observed.
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| - Spin-forbidden reactions (en)
- Спин-запрещенные реакции (ru)
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| - In chemistry, the selection rule (also known as the transition rule) formally restricts certain reactions, known as spin-forbidden reactions, from occurring due to a required change between two differing quantum states. When a reactant exists in one spin state and the product exists in a different spin state, the corresponding reaction will have an increased activation energy when compared to a similar reaction in which the spin states of the reactant and product are isomorphic. As a result of this increased activation energy, a decreased rate of reaction is observed. (en)
- Спин-запрещенные реакции (англ. spin-forbidden reactions) — химические реакции, в ходе которых происходит изменение спинового состояния участвующих частиц. С точки зрения нерелятивистской квантовой механики, подобные реакции являются запрещенными, тем не менее скорость их протекания может быть достаточно высокой. Спин-запрещенные реакции могут быть как мономолекулярными, так и бимолекулярными. В случае бимолекулярных реакций изменение спина определяется на основании сравнения суммарного спина частиц до и после реакции. (ru)
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| - In chemistry, the selection rule (also known as the transition rule) formally restricts certain reactions, known as spin-forbidden reactions, from occurring due to a required change between two differing quantum states. When a reactant exists in one spin state and the product exists in a different spin state, the corresponding reaction will have an increased activation energy when compared to a similar reaction in which the spin states of the reactant and product are isomorphic. As a result of this increased activation energy, a decreased rate of reaction is observed. (en)
- Спин-запрещенные реакции (англ. spin-forbidden reactions) — химические реакции, в ходе которых происходит изменение спинового состояния участвующих частиц. С точки зрения нерелятивистской квантовой механики, подобные реакции являются запрещенными, тем не менее скорость их протекания может быть достаточно высокой. Спин-запрещенные реакции могут быть как мономолекулярными, так и бимолекулярными. В случае бимолекулярных реакций изменение спина определяется на основании сравнения суммарного спина частиц до и после реакции. (ru)
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