isomeric

简明释义

英[ˌaɪsəˈmerɪk]美[ˌaɪsəˈmerɪk]

adj. [化学] 同分异构的；[化学][核] 同质异构的

英英释义

单词用法

同义词

反义词

例句

1.By definition, octane is any isomeric saturated hydrocarbon found in petroleum and used as a fuel and solvent.

辛烷值是什么？根据定义，辛烷值是任何单一的石油、饱和烃发现作为燃料和溶剂。

2.Using the rotational isomeric state theory, the mean square radius of gyration < S 2> and its temperature coefficient for the polymer chain with large side groups are derived.

在旋转异构态理论基础上，建立双侧基高分子链均方旋转半径的计算公式，由此得到聚甲基苯乙烯的均方旋转半径特征比与链长的关系，计算结果与实验数值十分一致。

3.To cause to change into an isomeric form.

使…异构化使…变成一种异构的形式。

4.In the presence of catalyst phosphoric acid, isomeric addition of bipentene with cis-butenedioic anhydride can form terpenyl bu tenedioic anhydride compound as expoxylite firming agent.

用磷酸做催化剂，催化工业双戊烯与顺丁烯二酸酐进行异构加成反应。

5.The anthraquinone isomeric conjugate polymerized vegetable oil can replace the tung oil to prepare paint.

蒽醌异构共轭聚合植物油，可代替桐油制涂料。

6.The Raman spectra of both of isomeric crystal and its melt show the vibration mode of the same isolated anionic coordination polyhedron.

同质异构晶体的熔体拉曼谱都显示出相同的孤立负离子配位多面体振动峰。

7.The present invention is directed to the diastereoisomeric mixture and the individual isomeric components of the formula above.

本发明涉及以下结构式所示非对映异构体混合物及单个异构体成分。

8.The two compounds are isomeric 异构的 forms of glucose.

这两种化合物是葡萄糖的异构的形式。

9.In organic chemistry, isomeric 异构的 structures can have vastly different properties.

在有机化学中，异构的结构可能具有截然不同的性质。

10.The isomeric 异构的 relationship between butane and isobutane is a classic example.

丁烷和异丁烷之间的异构的关系是一个经典例子。

11.Scientists often study isomeric 异构的 compounds to understand their reactivity.

科学家们常常研究异构的化合物以了解它们的反应性。

12.The isomeric 异构的 forms of a drug can lead to different effects in the body.

药物的异构的形式可能导致身体产生不同的效果。

作文

The study of chemistry is a fascinating journey into the world of molecules and compounds. Among the many concepts that chemists encounter, the term isomeric (异构的) stands out due to its significance in understanding the diversity of chemical structures. Isomers are compounds that share the same molecular formula but differ in the arrangement of their atoms. This fundamental concept illustrates how slight variations in structure can lead to vastly different properties and behaviors in substances. To illustrate the importance of isomeric (异构的) compounds, consider the example of butane. Butane has the molecular formula C4H10, yet it exists in two distinct forms: n-butane and isobutane. N-butane is a straight-chain alkane, while isobutane is a branched-chain alkane. Despite having the same number of carbon and hydrogen atoms, these two isomers exhibit different physical properties. For instance, n-butane has a boiling point of approximately 0.6 degrees Celsius, whereas isobutane boils at around -11.7 degrees Celsius. This difference in boiling points is crucial for applications in the petrochemical industry, where specific isomers are desired for various uses. The isomeric (异构的) nature of compounds extends beyond alkanes. In the realm of organic chemistry, we find functional group isomers, which occur when compounds have the same molecular formula but different functional groups. An example of this is the case of alcohols and ethers, both of which can share the same molecular formula C2H6O. Ethanol, an alcohol, has a hydroxyl (-OH) group, while dimethyl ether, an ether, has an ether (-O-) linkage. These differences not only affect their chemical reactivity but also their applications; ethanol is commonly used as a beverage and a solvent, while dimethyl ether is utilized as a propellant and refrigerant. Another fascinating aspect of isomeric (异构的) compounds is stereoisomerism, where isomers differ in the spatial arrangement of their atoms. Stereoisomers can be further divided into geometric isomers and optical isomers. Geometric isomers arise from the restricted rotation around a double bond, leading to cis and trans forms. For example, in the case of 2-butene, the cis isomer has both methyl groups on the same side of the double bond, while the trans isomer has them on opposite sides. This seemingly minor distinction can lead to significant differences in physical properties and biological activity. Optical isomers, or enantiomers, are another intriguing category of isomeric (异构的) compounds. These isomers are non-superimposable mirror images of each other, much like left and right hands. A classic example is the amino acid alanine, which exists as two enantiomers: L-alanine and D-alanine. The biological significance of these enantiomers is profound, as living organisms often utilize only one form of an enantiomer for biochemical processes. This specificity can affect drug efficacy and metabolism, highlighting the importance of chirality in pharmacology. In conclusion, the concept of isomeric (异构的) compounds is essential in chemistry, illustrating how variations in molecular structure can lead to diverse properties and functionalities. From alkanes to functional group isomers and stereoisomers, understanding isomerism enriches our knowledge of chemical behavior and its implications in real-world applications. As we continue to explore the complexities of chemistry, the study of isomeric (异构的) compounds will undoubtedly remain a pivotal area of research and discovery.

化学研究是进入分子和化合物世界的迷人旅程。在化学家遇到的众多概念中，术语isomeric（异构的）因其在理解化学结构多样性方面的重要性而脱颖而出。异构体是指具有相同分子式但原子排列不同的化合物。这个基本概念说明了结构的微小变化如何导致物质的性质和行为发生巨大差异。 为了说明isomeric（异构的）化合物的重要性，考虑丁烷的例子。丁烷的分子式为C4H10，但它存在两种不同的形式：正丁烷和异丁烷。正丁烷是一种直链烷烃，而异丁烷是一种支链烷烃。尽管它们具有相同数量的碳和氢原子，但这两种异构体表现出不同的物理性质。例如，正丁烷的沸点约为0.6摄氏度，而异丁烷的沸点约为-11.7摄氏度。这种沸点差异对于石油化工行业至关重要，因为该行业需要特定的异构体用于各种用途。 isomeric（异构的）化合物的性质不仅限于烷烃。在有机化学领域，我们发现功能团异构体，它们的分子式相同但功能团不同。一个例子是醇和醚，它们可以共享相同的分子式C2H6O。乙醇是一种醇，具有羟基（-OH）基团，而二甲醚是一种醚，具有醚（-O-）连接。这些差异不仅影响其化学反应性，还影响其应用；乙醇通常用作饮料和溶剂，而二甲醚则用作推进剂和制冷剂。 isomeric（异构的）化合物的另一个迷人方面是立体异构现象，其中异构体在原子的空间排列上有所不同。立体异构体可以进一步分为几何异构体和光学异构体。几何异构体源于双键周围的旋转受限，导致顺式和反式形式。例如，在2-丁烯的情况下，顺式异构体的两个甲基基团位于双键同侧，而反式异构体则位于对侧。这种看似微小的区别可能导致物理性质和生物活性方面的显著差异。 光学异构体或对映体是isomeric（异构的）化合物的另一种有趣类别。这些异构体是彼此不可叠加的镜像，就像左右手一样。一个经典的例子是氨基酸丙氨酸，它存在两种对映体：L-丙氨酸和D-丙氨酸。这些对映体的生物学意义深远，因为生物体通常仅利用一种形式的对映体进行生化过程。这种特异性可能影响药物的有效性和代谢，突显了手性在药理学中的重要性。 总之，isomeric（异构的）化合物的概念在化学中至关重要，说明了分子结构的变化如何导致多样的性质和功能。从烷烃到功能团异构体和立体异构体，理解异构现象丰富了我们对化学行为及其在现实世界应用中的影响的认识。随着我们继续探索化学的复杂性，isomeric（异构的）化合物的研究无疑将继续成为研究和发现的关键领域。