共振和互变异分之间的差异

关键区别 - 共鸣与互变异委瘤

异构体是一种化学现象，它解释了具有具有不同结构和特性的相同分子式的有机化合物的结构。异构主义是同一分子公式的不同分子结构和空间排列的存在。Isomers主要分为两组constitutional isomers and stereoisomers。互变异者是一种宪法异构体。这些是容易互换的有机化合物。另一方面，共鸣是化学现象，它描述了孤对和键电子对的影响polarityof a compound. Thekey differencebetween resonance and tautomerism is thatresonance occurs due to the interaction between lone electron pairs and bond electron pairs whereas tautomerism occurs due to the interconversion of organic compounds by relocating a proton.

内容

1.Overview and Key Difference
2.什么是共鸣
3.What is Tautomerism
4.并排比较 - 共鸣与互变异构态度以表格形式
5.概括

什么是共鸣?

共振是一个化学概念，它描述了化合物的孤独电子对与键电子对之间的相互作用。这种作用最终决定了该有机或无机化合物的实际化学结构。可以在具有的化合物中观察到共振效果double bonds和lone electron pairs. The resonance results in polarity of molecules.

共振效应通过将电子定位在内稳定化合物pi bonds。分子中的电子可以在原子核周围移动，因为电子没有原子的固定位置。因此，孤独的电子对可以移动到PI键，反之亦然。发生这种情况是为了获得稳定的状态。这种电子运动过程称为共振。共振结构可用于获得分子的最稳定结构。

A molecule can have several resonance structures based on the number of lone pairs and pi bonds present in that molecule. All the resonance structures of a molecule have the same number of electrons and the same arrangement of atoms. The actual structure of that molecule is a hybrid structure in all resonance structures. The resonance effect can be found in two types;

1. Positive resonance effect
2. 负共振效应

积极的共振效应解释了可以在具有阳性电荷的化合物中发现的共振。然后，阳性共振效应有助于稳定该分子中的正电荷。负共振效应解释了分子中负电荷的稳定。但是，考虑共振的能量低于所有共振结构，获得的杂种结构的能量低。

What is Tautomerism?

互变异是具有通过重新定位质子来互转换的几种化合物的作用。This effect is most common inamino acids和核酸。相互转换的过程称为互变构。这是一种化学反应。在这里，质子的迁移是指在其他两种形式的原子之间交换氢原子。氢原子形成covalent bondwith the new atom that receives the hydrogen atom. The tautomers exist in equilibrium with each other. They always exist in a mixture of two forms of the compound since they attempt to prepare the separate tautomeric form.

During the tautomerization, carbon skeleton of a molecule does not change. Only the position of protons and electrons are changed. The tautomerization is an intramolecular chemical process of conversion of one form of tautomer into a different form. A common example is a keto-enol Tautomerism. It is an acid or base catalyzed reaction. typically, the keto form of an organic compound is more stable, but in some states, the enol form is more stable than the keto form.

What is the Difference Between Resonance and Tautomerism?

Resonance vs Tautomerism
共振是一个化学概念，它描述了化合物的孤独电子对与键电子对之间的相互作用。	互变异是具有通过重新定位质子来互转换的几种化合物的作用。
Process
Resonance is the presence of several forms (of the same chemical compound) which determines the actual structure of a compound.	互变异主义is the presence of two (or more) forms of the same compound that are capable of interconversion.
Equilibrium State
共振结构在平衡中不存在。	Tautomers exist in equilibrium with each other.
搬迁
共振结构可以获得的relocation of bond electrons and lone electron pairs.	Tautomers can be obtained by relocation a proton (and electrons).

概括–Resonance vs Tautomerism

Resonance and Tautomerism are important chemical concepts. Resonance is used to determine the actual structure of a chemical compound. Tautomerism determines the chemical structure of a compound, which is most stable at given conditions. There are many differences between two terms. The difference between resonance and tautomerism is that resonance occurs due to the interaction between lone electron pairs and bond electron pairs whereas tautomerism occurs due to the interconversion of organic compounds by relocating a proton.

Reference:

1.Brown, William H. “Tautomerism.” Encyclopædia Britannica, Encyclopædia Britannica, Inc., 20 May 2014.Available here
2.’Tautomerism’ , Department of Chemistry, University of Oxford.Available here
3.“Resonance (Chemistry).” Wikipedia, Wikimedia Foundation, 16 Mar. 2018.Available here

Image Courtesy:

1.’Phenol resonance’By Smallman12q – Own work, (Public Domain) viaCommons Wikimedia
2.’Acetylacetone keto-enol tautomerism’By Vaccinationist – Own work, (Public Domain) viaCommons Wikimedia