A single covalent bond is created when two atoms share a pair of electrons. There is no net charge on either atom; the attractive force is produced by interaction of the electron pair with the nuclei of both atoms. If the atoms share more than two electrons, double and triple bonds are ...
7.(Chemistry)chemthe phenomenon in which the electronic structure of a molecule can be represented by two or more hypothetical structures involving single, double, and triple chemical bonds. The true structure is considered to be an average of these theoretical structures ...
the atoms can become very good friends and form double or even triple bonds. When there’s a double bond, one isa sigma bondand the other isa pi bond.Similarly, when there are three bonds, one of them is a sigma bond, and both of the other two are called pi bonds!
Reports on the Mims and Davies pulsed electron-nuclear double-resonance spectroscopy of the hydrogen bonds and cysteinyl beta-methane of the Desulfovibrio gigas hydrogenase. Intrinsic isotropic hyperfine couplings for the protons; Assigning the exchangeable deuterons; Spin-coupling among the three iron ...
Today these probes are available for operation with 5 and 3 mm diameter sample tubes and also for LC-NMR and flow injection modes. At present the variety of available configurations comprises probes optimised for 1H- and 13C-detection, and probes for triple resonance involving either 15N or 31...
In the first part of this paper there is given a set of bond鈥恊nergy values for single, double, and triple bonds between atoms, obtained from thermochemic... L Pauling,J Sherman - 《Journal of Chemical Physics》 被引量: 643发表: 1933年 ...
Replacing a hydrogen atom with a deuteron causes isotope effects on the chemical shifts of nuclei within as many as four covalent bonds of the site of substitution (38–40). As a result, 13C chemical shifts in a fully protonated protein, δC(H), will be different than those in a perde...
For many classes of compounds, for example, saturated hydrocarbons, molecules can be satisfactorily described on the basis of a single valence-bond structure. Other molecules, such as those with conjugated double and triple bonds, require the concept of superposition (resonance) of several valence-bo...
So what that means is that literally I'm not moving any atoms. All I'm moving is double bonds around or triple bonds around and I'm also moving where lone pairs are at. That has to do with the electrons that are moving throughout the molecule. Now, something about res...
bonds tend to inherently exhibit levels of covalency that are practical to investigate4,5,6,7,8,9. The generally accepted chemical bonding picture is that for early actinides the bonding varies from ionic to polarised-covalent as a function of An-oxidation state and ligands, with this range ...