In chemistry, isomers are molecules or polyatomic ions with identical molecular formula – that is, the same number of atoms of each element – but distinct arrangements of atoms in space. [1] Isomerism refers to the existence or possibility of isomers. Isomers do not necessarily share similar chemical or physical properties.

Isomers are molecules with the same molecular formulas, but different arrangements of atoms. There are several different types of isomers which will be described and a flowchart (see figure below) can help you determine which type of isomers are present.

2022年11月17日 · After completing this section, you should be able to explain the differences among constitutional (structural) isomers and stereoisomers (geometric isomers). Make certain that you can define, and use in context, the key terms below. The following flow chart can be used to identify the relationship of two compounds with respect to isomerization:

同分異構物的分類. 在化学中，同分异构（isomerism）或同分异构现象，简称异构 [1] ，是两或多个化合物具有相同分子式而有不同的结构和性质的现象；此现象主要是由分子中原子成键的顺序不同和空间排列方式不同而引起 [2] 。. 同分異構物（ isomer ）简称异构体 [3] ，是擁有相同分子 …

Isomers are structures with the same molecular formula and chemical composition but different arrangements of atoms in space [1-4]. There are two main types of isomers: structural isomers and stereoisomers [1-8]. Structural isomers are also called constitutional isomers.

isomerism, the existence of molecules that have the same numbers of the same kinds of atoms (and hence the same formula) but differ in chemical and physical properties. The roots of the word isomer are Greek— isos plus meros, or “equal parts.”

同质异能素（isomer）即同核异能素，是具有相同质量数和原子序数 而处于较长寿命激发态的核素。 通常在核素符号的质量数后面加写m来标记。 如60mCo是60Co的一种同核异能素，它的能量比60Co高59千电子伏 ，半衰期为10.5分。 大多数同核异能素要发生γ跃迁，少数发生β衰变，个别的 …

Isomerism is the phenomenon in which more than one compounds have the same chemical formula but different chemical structures. Chemical compounds that have identical chemical formulae but differ in properties and the arrangement of atoms in the molecule are called isomers. Therefore, the compounds that exhibit isomerism are known as isomers.

2018年9月10日 · Here we explain the different types of isomers - constitutional, stereoisomers, enantiomers and diastereomers - and see how it's like family relationships.

2017年6月12日 · Isomerization is the process by which one molecule is converted into another molecule with the identical atoms. This may occur spontaneously or a reaction may be required to achieve this effect. There are two main types of isomers, structural isomers and stereoisomers (illustrated below).