离子键理论 离子健( ionic bond )又称为盐键( salt bond ),是化学键的一种,通过两个或多个原子或化学基团失去或获得电子而成为离子后形成。带相反电荷的原子或基团之间存在静电吸引力,两个带相反电荷的原子或基团靠近时,带负电和带正电的原子或基团之间产生静电引力以形成离子键。离子键往往在金属与非金属间形成。
energy-driven orbital localizationThis article concerns the embedding in covalent materials problem in general and the construction of one-electron pseudoatoms to substitute the parts of a molecule connected with a chemical bond in particular. For this the procedure to part a molecule into the ion-...
The historical development of the idea of the chemical bond and its electron nature is briefly outlined. The ionic, covalent and metallic bonds are presented as ideal types in a continuum of intermediate cases. Thus, bonds of polar-covalent nature are in
Chemical energy All organisms must work to live, and they require a source of potential energy which can be utilized in order to perform the life processes. This energy can be found in the form of the chemical energy of biomass used as food. Energy can also be in the form of the chemic...
By controlling C–C bond formation in catalytic arylation, lignin can be efficiently extracted from biomass and converted into benign bisphenols that can be used as replacements for their fossil-based counterparts. Ning Li , Kexin Yan & Feng Wang Perspective | 08 May 2024 The refinery of the...
In this issue, we focus on the preparation of various materials used for applications in energy science and technology. Editorial14 May 2025Nature Synthesis Volume: 4, P: 523-524 Engineered dielectrics for high energy Alexandra R. Groves
So although the "chemical bond" (as a physical object) may be no more than a convenient fiction,chemical bonding, which leads to the near-infinity of substances (31 million in mid-2007), lies at the very core of chemistry. The forces that hold bonded atoms together are basically just the...
In discussing the chemical bond in Chapter 4.1, Robin Hendry stresses the central explanatory role that the concept needs to fulfil, and Michael Weisberg, in Chapter 4.5, makes more general claims about the explanatory function of many chemical models. Yet these claims raise a variety of ...
C−H bond functionalization is widely used in chemical synthesis but achieving regio- and stereoselectivity is still challenging. Here, the authors report the mechanism of three Fe(II)/α-ketoglutarate-dependent dioxygenases in bicyclomycin synthesis, which depicts the natural strategy to sequentially...
The quantum mechanical description of the chemical bond is generally given in terms of delocalized bonding orbitals, or, alternatively, in terms of correlations of occupations of localised orbitals. However, in the latter case, multiorbital correlations were treated only in terms of two-orbital corr...