埃塔2 - 二氨酸Ru (II) pi复合物
Shigeru Yamaguchi1, Hiroshi Shinokubo, Atsuhiro Osuka
1Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.
Journal of the American Chemical Society
|July 30, 2010
概括
研究人员合成了稳定的鲁(II) pi复合物与eta(2) - - 二林配体. Pi-pi堆叠相互作用使eta(2) 能够形成pi键,改变电子性质. 这些甲复合物为高级应用提供了可调节的特性.
科学领域:
- 有机金属化学 有机金属化学
- 协调化学 协调化学
- 材料科学 材料科学 材料科学
背景情况:
- (II) 复合物在催化和材料科学中至关重要.
- 氨酸是具有可调节电子特性的多功能宏循环.
- 了解金属-连接体相互作用是设计功能分子的关键.
研究的目的:
- 为了合成和表征新型,高度稳定的eta(2) - 氨酸二) pi复合物.
- 调查pi-pi堆叠相互作用在eta(2) pi键的形成中的作用.
- 探索协调对氨酸芳香度和电子性质的影响.
主要方法:
- 合成乙二氨酸二氨酸二复合物.
- 使用pi-pi堆叠相互作用来形成键.
- 用光谱和电化学分析来确定电子属性.
主要成果:
- 成功合成高度稳定的乙二二氨酸Ru二复合物.
- 展示了pi-pi堆叠,以促进 eta(2) pi 键的形成.
- 观察协调后氨酸芳香度和电子性质的显著变化.
结论:
- 合成的Ru(II) pi复合体表现出了显著的稳定性.
- 与二烯的协调大大改变了它们的电子结构.
- 在上对联体微调提供了一条控制复杂性质的途径.
相关概念视频
Aromatic Hydrocarbon Cations: Structural Overview
Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group with both...
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Photochemical Electrocyclic Reactions: Stereochemistry
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Selection Rules: Photochemical Activation
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Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
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The multi-protein complex photosystem II (PS II) harvests photons and transfers their energy through its bound pigments to its reaction center, and ultimately to photosystem I (PSI) through the electron transport chain. The pigments responsible for caputirng the light energy in photosystems include chlorophyll a, chlorophyll b, and carotenoids.
The pigment molecules are arranged across two photosystem domains — the antenna complex and the reaction center. The main aim of the pigment molecules...
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The stereochemistry of electrocyclic reactions is strongly influenced by the orbital symmetry of the polyene HOMO. Under thermal conditions, the reaction proceeds via the ground-state HOMO.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.

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