aromatic ring

简明释义

1. 芳环; 2. 芳香环;

英英释义

例句

1.When analyzing the structure, we identified an aromatic ring that influenced the compound's properties.

在分析结构时，我们识别出一个影响化合物性质的芳香环。

2.The compound contains a benzene structure with a well-defined aromatic ring.

该化合物包含一个苯结构，具有明确的芳香环。

3.The presence of an aromatic ring in a molecule often contributes to its flavor and fragrance.

分子中存在的芳香环通常会增强其风味和香气。

4.Many pharmaceuticals are designed around an aromatic ring to enhance their efficacy.

许多药物的设计围绕着一个芳香环，以增强其效能。

5.In organic chemistry, the stability of an aromatic ring is crucial for many reactions.

在有机化学中，芳香环的稳定性对许多反应至关重要。

作文

The concept of an aromatic ring is fundamental in the field of organic chemistry. Aromatic compounds are characterized by their stable ring structures and unique chemical properties, which distinguish them from other types of hydrocarbons. The aromatic ring typically consists of six carbon atoms arranged in a hexagonal shape, with alternating single and double bonds. This configuration allows for resonance, where electrons are delocalized across the ring, contributing to the stability and reactivity of the molecule.One of the most well-known examples of a compound featuring an aromatic ring is benzene. Benzene, with its formula C6H6, is a colorless liquid that has a distinct sweet odor. It is not only a fundamental building block in organic chemistry but also serves as a precursor for various synthetic materials, including plastics, dyes, and pharmaceuticals. The presence of the aromatic ring in benzene contributes significantly to its chemical behavior, allowing it to undergo substitution reactions rather than addition reactions, which are more common in aliphatic compounds.The stability of the aromatic ring can be attributed to its resonance structure; the electrons within the ring do not belong to any specific bond but are shared equally among all carbon atoms. This delocalization results in a lower energy state, making the aromatic ring less reactive than aliphatic counterparts. For instance, when benzene reacts with chlorine, it does so through a substitution mechanism, replacing one hydrogen atom with a chlorine atom while maintaining the integrity of the aromatic ring.In addition to benzene, there are many other compounds that possess aromatic rings, such as toluene, naphthalene, and anthracene. Each of these compounds exhibits unique properties and applications due to the presence of the aromatic ring. Toluene, for instance, is widely used as an industrial solvent and in the production of paint thinners, while naphthalene is known for its use in mothballs and as a precursor to other chemicals.The significance of the aromatic ring extends beyond just individual compounds; it plays a crucial role in biological systems as well. Many natural substances, such as amino acids and vitamins, contain aromatic rings, which contribute to their biological activity and functions. For example, the amino acid phenylalanine contains a phenyl group, which is an aromatic ring that is essential for protein synthesis in living organisms.In conclusion, the aromatic ring is a vital concept in organic chemistry that has far-reaching implications in various fields, including materials science, pharmacology, and biochemistry. Its unique structure and properties make it a subject of extensive study and application. Understanding the characteristics and behaviors of aromatic rings allows chemists to design and synthesize new compounds with desired properties, leading to innovations in technology and medicine. As research continues, the aromatic ring remains a cornerstone of chemical science, illustrating the beauty and complexity of molecular structures.

在有机化学领域，芳香环的概念是基础性的。芳香化合物以其稳定的环状结构和独特的化学性质为特征，这使它们与其他类型的烃区分开来。芳香环通常由六个碳原子以六角形排列，具有交替的单键和双键。这种构型允许共振，其中电子在环内离域，促进了分子的稳定性和反应性。最著名的含有芳香环的化合物之一是苯。苯的化学式为C6H6，是一种无色液体，具有明显的甜味气味。它不仅是有机化学中的基本构件，而且还作为各种合成材料的前体，包括塑料、染料和药品。苯中芳香环的存在显著影响了其化学行为，使其能够进行取代反应，而不是更常见的加成反应。芳香环的稳定性可以归因于其共振结构；环内的电子并不属于任何特定的键，而是平均分布在所有碳原子之间。这种离域导致较低的能量状态，使得芳香环比脂肪族化合物反应性更低。例如，当苯与氯反应时，它通过取代机制进行，替换一个氢原子为氯原子，同时保持芳香环的完整性。除了苯，还有许多其他具有芳香环的化合物，如甲苯、萘和蒽。由于芳香环的存在，每种化合物都表现出独特的性质和应用。例如，甲苯广泛用作工业溶剂和生产油漆稀释剂，而萘则以其在防蛀剂中的使用而闻名，并且是其他化学品的前体。芳香环的重要性不仅限于单个化合物；它在生物系统中也发挥着关键作用。许多天然物质，如氨基酸和维生素，含有芳香环，这对它们的生物活性和功能至关重要。例如，氨基酸苯丙氨酸包含一个苯基，这是一个芳香环，对于生物体内的蛋白质合成至关重要。总之，芳香环是有机化学中一个重要的概念，在材料科学、药理学和生物化学等多个领域都有深远的影响。它独特的结构和性质使其成为广泛研究和应用的对象。理解芳香环的特征和行为使化学家能够设计和合成具有所需性质的新化合物，从而推动技术和医学的创新。随着研究的继续，芳香环仍然是化学科学的基石，展示了分子结构的美丽和复杂性。