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Alkyl halides are halogen-substituted alkanes wherein one or more hydrogen atoms of an alkane is replaced by a halogen atom such as fluorine, chlorine, bromine, or iodine. The carbon atom in an alkyl halide is bonded to the halogen atom, which is sp3-hybridized and exhibits a tetrahedral shape.
Unlike alkyl halides, compounds in which a halogen atom is bonded to an sp2 -hybridized carbon atom of a carbon-carbon double bond (C=C) are called vinyl halides. Whereas aryl...
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Group 17 elements, known as halogens, are nonmetals. At room temperature, fluorine and chlorine are gases, bromine is a liquid, and iodine a solid. Astatine is a highly unstable radioactive element, so currently, most of its properties are unknown due to its short half-life. Tennessine is a synthetic element also predicted to be in this group. 
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Many covalent molecules have central atoms that do not have eight electrons in their Lewis structures. These molecules fall into three categories:
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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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平面五坐标素.

Li-Juan Cui1, Lin-Hong Miao1, Mesías Orozco-Ic2,3

  • 1Institute of Atomic and Molecular Physics, Jilin University, Changchun, 130023, China.

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PubMed
概括
此摘要是机器生成的。

研究人员在Li5X6-集群中发现了平面五坐标素 (ppX). 这些新的结构挑战了传统的结合,由静电力和弱共价相互作用稳定.

关键词:
素是一种素.结合的结合 结合的结合全球最小值全球最小值这是一种超协调的超协调.磁性属性是一种磁性属性.

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科学领域:

  • 无机化学 无机化学
  • 计算化学的计算化学
  • 量子化学 是一个量子化学.

背景情况:

  • 平面的高坐标图案突破了化学结合理论的界限.
  • 设计平面超协调素是具有挑战性的,因为电子负性和移位效应.

研究的目的:

  • 通过计算来研究Li_n X_{n+1}^-星团中平面高坐标素的可能性.
  • 探索这些新型图案的结构,电子和粘合特性.

主要方法:

  • 对Li_n X_{n+1}^- (n=4, 5, 6; X=F, Cl, Br, I) 星团进行了广泛的计算调查.
  • 对结构稳定性,对称性 (D5h) 和电子性能进行分析.

主要成果:

  • 确定了Li_5 X_6^- (X=F,Cl,Br) 的全球最小值,其中包含一个平面五坐标素 (ppX).
  • ppX位于Li_5 X_5冠中,通过静电相互作用和dative对应键稳定.
  • 由于弱轨道重叠,在素和原子周围观察到局部的二热环电流.

结论:

  • 证明了在特定的-素团中存在平面五坐标素的存在.
  • 这些发现扩大了对超协调化学和素结合的理解.
  • 独特的电子结构表明了新化学反应和特性的潜力.