同分異構 - 维基百科，自由的百科全书
化學 中常見的兩種主要的種類為 結構異構 （structural isomerism或constitutional isomerism）以及 立體異構 （stereoisomerism）。 同分异构现象 第一次被注意到是在1827年，当 弗里德里希·维勒 制备 异氰酸 的时候，他注意到尽管元素组成与 尤斯图斯·冯·李比希 在前一年制备出来的 雷酸 完全相同，但是它们的性质却极为不同。 这个发现挑战了当时的主流化学界的理解，当时主流思想认为仅当元素组不同的时候，化合物才会不同。 随着更多此类现象被發現，比如維勒在1828年发 …
同分異構 - 維基百科，自由的百科全書
同分異構物 （英語： Isomer）是擁有相同 分子式，但 結構式 卻不相同的多種 分子。 其彼此間的化學性質並不相同，除非它們擁有相同的 官能基 （functional groups）。 化學 中常見的兩種主要的種類為 結構異構 （structural isomerism或constitutional isomerism）以及 立體異構 （stereoisomerism）。 問卷資料由第三方處理。 了解隱私權。 若要停止 QuickSurveys， 請更改您的偏好設定。 同分異構現象 第一次被注意到是在1827年，當 弗里德里希·維勒 製備 異氰酸 …
同质异能素 - 百度百科
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。
Isomer - Wikipedia
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.
8.1: Types of Isomers - Chemistry LibreTexts
2022年11月17日 · The image below shows the two geometric isomers, called cis-2-butene and trans-2-butene. Geometric Isomers of 2-Butene. The cis isomer has the two single hydrogen atoms on the same side of the molecule, while the trans isomer has them on opposite sides of the molecule. In both molecules, the bonding order of the atoms is the same.
5.9 A Review of Isomerism - Organic Chemistry - OpenStax
There are two fundamental types of isomers, both of which we’ve now encountered: constitutional isomers and stereoisomers. Constitutional isomers (Section 3.2) are compounds whose atoms are connected differently. Among the kinds of constitutional isomers we’ve seen are skeletal, functional, and positional isomers.
Isomer Design Academy
2023年8月22日 · Share sensitive information only on official, secure websites. Craft impactful Isomer sites with effective web design strategies. Start learning today! "Where do I go? What am I supposed to click into?" Discover the challenges and experiences that users encounter on current school websites through our research.
Isomerism | Definition, Types, & Examples | Britannica
2024年11月26日 · Constitutional isomers are molecules of different connectivity—analogous to simple bracelets in which the order of red and green beads is different. The second type is stereoisomers. In stereoisomers the connectivity is the same, but …
3.4. Isomers | Organic Chemistry 1: An open textbook - Lumen …
We have defined isomers in a very general way as nonidentical molecules that possess the same number and kind of atoms. However, there are several ways in which isomers can be nonidentical. Among the alkenes, 1- and 2-butene are position isomers, because in these compounds the double bond has a different position in the carbon chain
Configuration | Isomer Guide (Legacy sites)
logo: the path to the logo that will be located at the left of the navigation bar, e.g. /images/logo.svg. The logo size is adjusted dynamically by the user's browser, but we recommend a logo resolution of 170x50 pixels. links: a list of items in the navigation bar.