conjugated diene

简明释义

共轭二烯

英英释义

例句

1.The stability of a conjugated diene (共轭二烯) is higher than that of isolated dienes due to resonance.

由于共振，conjugated diene (共轭二烯) 的稳定性高于孤立二烯。

2.The addition of bromine to a conjugated diene (共轭二烯) results in a dibromide product.

溴与conjugated diene (共轭二烯) 的加成反应会生成二溴化物产品。

3.The UV-Vis spectrum of a conjugated diene (共轭二烯) shows characteristic absorption peaks.

conjugated diene (共轭二烯) 的紫外可见光谱显示出特征吸收峰。

4.In organic chemistry, a conjugated diene (共轭二烯) can undergo Diels-Alder reactions.

在有机化学中，conjugated diene (共轭二烯) 可以进行Diels-Alder反应。

5.A conjugated diene (共轭二烯) has alternating single and double bonds.

conjugated diene (共轭二烯) 具有交替的单键和双键。

作文

In the realm of organic chemistry, the concept of conjugated diene (共轭二烯) plays a pivotal role in understanding the behavior of certain compounds. A conjugated diene is defined as a hydrocarbon that contains two double bonds separated by a single bond. This unique structure allows for the delocalization of pi electrons across the entire molecule, which significantly affects its reactivity and stability. The presence of conjugation can lead to interesting properties, such as lower energy transitions and increased stability compared to isolated double bonds.One of the most important aspects of conjugated diene systems is their ability to undergo various chemical reactions, particularly those involving electrophiles. For instance, when a conjugated diene reacts with an electrophile, the electrons from the double bonds can be involved in resonance stabilization, leading to a more stable reaction intermediate. This phenomenon is particularly evident in reactions like the Diels-Alder reaction, where a conjugated diene reacts with a dienophile to form a cyclic compound. This reaction is widely utilized in synthetic organic chemistry for creating complex molecules efficiently.Furthermore, conjugated dienes exhibit unique optical properties due to their extended pi systems. They can absorb light in the ultraviolet-visible region, which makes them useful in various applications, including dyes and pigments. The colors that we perceive from these compounds are a direct result of the electronic transitions that occur when they absorb specific wavelengths of light. As the length of the conjugated system increases, the wavelength of light absorbed also increases, a phenomenon known as bathochromic shift.In addition to their chemical properties, conjugated dienes also play a significant role in biological systems. Many natural products, including essential oils and pheromones, contain conjugated diene structures. These compounds can interact with biological receptors and enzymes, influencing various biochemical pathways. For example, the smell of freshly cut grass is attributed to the release of volatile compounds that include conjugated dienes, which serve as signaling molecules in nature.The study of conjugated dienes is not limited to theoretical chemistry; it has practical implications in materials science as well. Polymers derived from conjugated dienes, such as polybutadiene and styrene-butadiene rubber, are widely used in the manufacturing of tires and other rubber products. The unique properties of these materials, including elasticity and durability, can be traced back to the underlying conjugated structure of the monomers used in their synthesis.In conclusion, the significance of conjugated diene (共轭二烯) in organic chemistry cannot be overstated. Its unique electronic properties, versatile reactivity, and presence in both synthetic and natural compounds make it a fundamental topic of study. As research continues to explore the intricacies of these molecules, we can expect to uncover even more applications and insights into their behavior, further solidifying their importance in the field of chemistry.