吡啶:过渡金属配合物中一种有用的配体

Pyridine Pub Date : 2018-07-18 DOI:10.5772/INTECHOPEN.76986
S. Pal
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引用次数: 34

摘要

吡啶(c5h5n)是最简单的六元杂环,其结构与苯非常相似。苯环上的“N”对共振环境具有很高的电负性影响,产生的化学性质与其碳负对数明显不同。在芳香环境中氮及其孤对的存在使吡啶在化学中成为一种独特的物质。“N”的sp2孤对轨道指向环骨架外,在产生σ键相互作用时很好地指向与空金属轨道重叠。这使得吡啶成为一种配体,并与所有过渡金属一起用于生产一系列金属配合物。关于吡啶及其衍生物的金属配合物的文献非常丰富。已经合成了无数具有学术和工业重要性的复合物。为了阐明吡啶的连接能力,本章介绍了与吡啶及其衍生物的过渡金属配合物。
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Pyridine: A Useful Ligand in Transition Metal Complexes
Pyridine (C 5 H 5 N) is being the simplest six-membered heterocycles, closely resembles its structure to benzene. The “N” in benzene ring has its high electronegativity influence on resonance environment and produces markedly different chemistry from its carbon ana - log. The presence of nitrogen and its lone pair in an aromatic environment makes pyri dine a unique substance in chemistry. The sp 2 lone pair orbital of “N,” directed outward the ring skeleton, is well directed to have overlap with vacant metal orbital in producing an σ bonding interaction. This causes pyridine to be a ligand and has been utilized with all transition metals in producing the array of metal complexes. A rich literature of metal complexes is now available with pyridine and its derivatives. Innumerable complexes have been synthesized with academic as well as industrial importance. To shed a light on ligating capability of pyridine, transition metal complexes with pyridine, and its deriva tive is presented in this chapter.
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