para isomer

简明释义

对位异构体

英英释义

例句

1.The reaction produced both the ortho and the para isomer, which are structurally different.

该反应产生了正构和对位异构体，它们的结构不同。

2.The synthesis of the para isomer was favored due to steric hindrance in the reaction pathway.

由于反应路径中的空间位阻，合成对位异构体更为有利。

3.The para isomer has a higher melting point than the ortho isomer.

对位异构体的熔点高于正构异构体。

4.In aromatic chemistry, the para isomer often exhibits different physical properties compared to its meta counterpart.

在芳香化学中，对位异构体通常表现出与其间位对应物不同的物理性质。

5.We need to separate the para isomer from the mixture for further analysis.

我们需要从混合物中分离出对位异构体以进行进一步分析。

作文

In the world of organic chemistry, isomers play a crucial role in understanding the different properties and behaviors of compounds. One interesting type of isomer is the para isomer, which refers to a specific arrangement of atoms within a molecule. Isomers are compounds that have the same molecular formula but differ in the arrangement of their atoms. The para isomer is characterized by the position of substituents on a benzene ring. In a para isomer, the substituents are located on opposite sides of the ring, specifically at the 1 and 4 positions. This unique configuration can lead to distinct physical and chemical properties compared to its other isomeric forms, such as ortho and meta isomers.For example, consider the compound 1,4-dichlorobenzene, which is a classic example of a para isomer. In this molecule, two chlorine atoms are attached to the benzene ring at the 1 and 4 positions. This arrangement results in a symmetrical structure that influences its boiling point, solubility, and reactivity. The para isomer tends to have a higher boiling point than its ortho counterpart due to its more stable structure, which minimizes steric hindrance between the substituents.Understanding the significance of para isomers extends beyond mere academic interest; it has practical implications in various fields, including pharmaceuticals and materials science. For instance, many drugs are designed with specific isomeric configurations to enhance their efficacy and reduce side effects. The para isomer of certain compounds may exhibit greater biological activity or selectivity towards a particular target, making it essential for drug development.Moreover, the study of para isomers is vital in the field of polymer chemistry. Polymers are often composed of repeating units that can exist in different isomeric forms. The arrangement of these units can significantly affect the properties of the resulting material, such as its strength, flexibility, and thermal stability. By manipulating the ratio of para isomers in a polymer, chemists can tailor the material for specific applications, ranging from packaging to aerospace engineering.In conclusion, the concept of para isomer is fundamental in organic chemistry and has far-reaching implications across various scientific disciplines. By grasping the importance of these isomers, we can better appreciate the complexity and diversity of chemical compounds. As research continues to evolve, the exploration of para isomers will undoubtedly lead to new discoveries and innovations that can benefit society in numerous ways.

在有机化学的世界中，同分异构体在理解化合物的不同性质和行为方面起着至关重要的作用。一个有趣的同分异构体类型是对位异构体，它指的是分子内原子的特定排列。同分异构体是具有相同分子式但在原子排列上有所不同的化合物。对位异构体的特点是取代基在苯环上的位置。在对位异构体中，取代基位于环的对侧，具体在1和4的位置。这种独特的构型可能导致与其其他异构体形式（如邻位和间位异构体）相比，具有不同的物理和化学性质。例如，考虑化合物1,4-二氯苯，它是对位异构体的经典例子。在这个分子中，两个氯原子分别附着在苯环的1和4位置。这种排列导致了一个对称的结构，影响其沸点、溶解度和反应性。与其邻位异构体相比，对位异构体往往具有更高的沸点，因为其更稳定的结构最小化了取代基之间的空间阻碍。理解对位异构体的重要性不仅仅是学术兴趣；它在制药和材料科学等多个领域具有实际意义。例如，许多药物的设计采用特定的异构体构型，以增强其疗效并减少副作用。某些化合物的对位异构体可能表现出更大的生物活性或对特定靶标的选择性，这对于药物开发至关重要。此外，对位异构体的研究在聚合物化学领域也至关重要。聚合物通常由可以存在于不同异构体形式的重复单元组成。这些单元的排列可能会显著影响所产生材料的性质，如强度、柔韧性和热稳定性。通过操控聚合物中对位异构体的比例，化学家可以为特定应用量身定制材料，从包装到航空航天工程。总之，对位异构体的概念在有机化学中是基础性的，并且在各个科学学科中具有深远的影响。通过掌握这些异构体的重要性，我们可以更好地欣赏化合物的复杂性和多样性。随着研究的不断发展，探索对位异构体无疑将带来新的发现和创新，造福社会的各个方面。