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In theoretical chemistry, a conjugated system is a system of connected p-orbitals with delocalized electrons in a molecule, which in general lowers the overall energy of the molecule and increases stability. It is conventionally represented as having alternating single and multiple bonds.
The conjugated diene is lower in energy: in other words, it is more stable. In general, conjugated pi bonds are more stable than isolated pi bonds. Conjugated pi systems can involve oxygen and nitrogen atoms as well as carbon. In the metabolism of fat
在 化學 當中， 共軛體系 是指具有 單鍵 - 雙鍵 交替結構的 體系 ，其中雙鍵的 p軌域 通過 電子離域 相互連接，這通常會降低分子的總能量並增加其穩定性。 這裡的 共軛 是指由一個 σ鍵 相隔的p軌域之間發生 軌域重疊 （如果是大的原子，也可能涉及 d軌域 ） [1] 孤對電子 ， 自由基 或 碳正離子 都可能是此系統的一部分。 這些化合物可能是 環狀 ，非環狀，線狀或雜和狀。 一個共軛體系會有一個p軌域重疊，連接其中間的單鍵。 它可以讓 π電子 游離通過所有相鄰對齊的p軌域。 [2] 此π電子不屬於單鍵或 原子 ，但是屬於一組的原子。 最大的共軛體系是在 石墨烯 、 石墨 、 導電聚合物 和 奈米碳管 中被發現的。
A conjugated system is a system of connected p-orbitals with delocalized electrons in compounds with alternating single and multiple bonds, which in general may lower the overall energy of the molecule and increase stability.
Conjugated system, in a covalent chemical compound, a group or chain of atoms bearing valence electrons that are not engaged in single-bond formation and that modify the behaviour of each other. If, for example, a carbonyl group (C ∶ O) and a hydroxyl group (OH) are widely separated in a molecule,
- The Editors of Encyclopaedia Britannica
2017年1月24日 · Conjugation is what we call it when 3 or more p orbitals join together into a larger “pi system”. These conjugated pi systems contain electrons, which we often call “pi electrons” to distinguish them from the electrons that comprise single bonds in the molecule.
Since these correspond to Lewis formulas of alternating double and single bonds, they can also be regarded as conjugated systems containing delocalized electrons. Experimentally we find that the more benzene rings a molecule contains, the longer the wavelengths at which it absorbs:
