Bis{4-(全-基) -N'-[4-(八-基) 基-基-基]基-基化)
Sultana Shakila Khan1, Md Belayet Hossain Howlader2, Md Chanmiya Sheikh3
1Department of Pharmacy, Pabna University of Science and Technology, Pabna-6600, Bangladesh.
IUCrData
|March 17, 2025
概括
(II) 复合体[Ni (C) 25H31N2O3) 2]有一个正方形平面几何体的中央原子. 这种结构分析提供了对协调复合体及其结合特征的见解.
科学领域:
- 协调化学 协调化学
- 无机化学 无机化学 有机化学
- 晶体学 晶体学是指结晶学.
背景情况:
- (II) 复合物在催化和材料科学中至关重要.
- 了解协调几何是预测复杂行为的关键.
- 在Ni (II) 复合体中,正方形平面几何学会影响电子和磁性.
研究的目的:
- 描述 (II) 复合物的晶体结构[Ni (C25H31N2O3) 2].
- 为了确定围绕中心Ni (II) 离子的协调几何和结合参数.
- 为了将获得的结构数据与类似的复合物进行比较.
主要方法:
- 采用单晶X射线衍射来分析该复合体.
- 结晶学数据被收集和精制以确定原子的位置.
- 纽带的长度和角度被精确地测量.
主要成果:
- 中心的Ni(II) 原子位于一个晶体逆转中心上.
- 观察到一个扭曲的正方形平面协调几何形状,由 imine 和 amide 氧气捐赠者定义.
- 确定了特定的Ni-N (1.8685(15) Å) 和Ni-O (1.8409(14) Å) 键长以及一个N-Ni-O角 (83.79(6) °).
结论:
- 结构数据证实了研究的复合体中Ni (II) 的正方形平面协调.
- 这些发现与之前报告的有关复合物的结构一致.
- 这项研究有助于理解对Ni (II) 协调几何学的联结体效应.
相关概念视频
ortho–para-Directing Deactivators: Halogens
5.3K
Halogens are ortho–para directors. They are more electronegative than carbon. Therefore, as ring substituents, they can withdraw electrons through the inductive effect and deactivate the aromatic ring towards electrophilic substitution. Halogens also have an electron-donating resonance effect on the ring, which influences the orientation of the incoming electrophile. If an electrophile attacks at the ortho or the para position, the halogen donates electrons and stabilizes the intermediate...
5.3K
Nomenclature of Alkynes
17.8K
Alkynes are unsaturated hydrocarbons characterized by the presence of carbon-carbon triple bonds and have a general formula CnH2n-2. The nomenclature of alkynes follows a set of rules similar to alkanes and alkenes; however, alkynes bear the suffix "-yne" instead of "-ane" or "-ene." There are two approaches to naming alkynes:
17.8K
ortho–para-Directing Activators: –CH3, –OH, –⁠NH2, –OCH3
5.7K
All ortho–para directors, excluding halogens, are activating groups. These groups donate electrons to the ring, making the ring carbons electron-rich. Consequently, the reactivity of the aromatic ring towards electrophilic substitution increases. For instance, the nitration of anisole is about 10,000 times faster than the nitration of benzene. The electron-donating effect of the methoxy group in anisole activates the ortho and para positions on the ring and stabilizes the corresponding...
5.7K
Criteria for Aromaticity and the Hückel 4n + 2 Rule
10.0K
Like benzene, cyclobutadiene and cyclooctatetraene are cyclic compounds with alternate single and double bonds. However, their chemical behavior differs from benzene, as they are unstable and not aromatic. So, what are the structural characteristics of unsaturated compounds categorized as aromatic?
For the first time, Eric Hückel, a German chemical physicist, derived a set of structural features for a compound to be classified as aromatic. This is now known as...
For the first time, Eric Hückel, a German chemical physicist, derived a set of structural features for a compound to be classified as aromatic. This is now known as...
10.0K
Aryldiazonium Salts to Azo Dyes: Diazo Coupling
2.9K
The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the...
2.9K
Diazonium Group Substitution: –OH and –H
2.7K
Nitrous acid, a weak acid, is prepared in situ via the reaction of sodium nitrite with a strong acid under cold conditions. This nitrous acid prepared in situ reacts with primary arylamines to form arenediazonium salts. Such reactions are known as diazotization reactions. As shown in Figure 1, the formation of arenediazonium salts begins with the decomposition of nitrous acid in an acidic solution to give nitrosonium ions.
2.7K


![Cercosporin-Photocatalyzed [4+1]- and [4+2]-Annulations of Azoalkenes Under Mild Conditions](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F60786.jpg&w=3840&q=50)