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   What is a hydrogen bond?

   • A hydrogen bond is an attraction between two atoms that already participate in other chemical bonds. One of the atoms is hydrogen, while the other may be any electronegative atom, such as oxygen, chlorine, or fluorine. Hydrogen bonds may form between atoms within a molecule or between two separate molecules.

   Hydrogen Bond Definition and Examples - ThoughtCo

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   What is chemical bonding?

   • Chemical bonding, any of the interactions that account for the association of atoms into molecules, ions, crystals, and other species. When atoms approach one another, their electrons interact and tend to distribute themselves in space so that the total energy is lower than it would be in any alternative arrangement.

   Chemical bonding | Definition, Types, & Examples | Britannica

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   How many pairs of electrons are in a chemical bond?

   • Most chemical bonds in molecules are made up of a single pair of electrons, shared between atoms. These are called covalent single bonds. In particularly strong bonds, atoms might share two electron pairs in a double bond, or three pairs — a triple bond.

   Carbon bond that uses only one electron seen for first time: ‘It will be i…

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   Why does a molecule have a single electron bond?

   • The single-electron bond comes about because the molecule’s central carbon–carbon bond is stretched, which makes it susceptible to losing one electron. Credit: Takuya Shimajiri et al./Nature Most chemical bonds in molecules are made up of a single pair of electrons, shared between atoms. These are called covalent single bonds.

   Carbon bond that uses only one electron seen for first time: ‘It will be i…

   www.nature.com/articles/d41586-024-03138-2

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   Which atoms are sp2 hybridized Despite the unsymmetrical bent-planar geometry?

   • The sum of the three bond angles around the C1 (359.3°) and C2 (359.6°) atoms indicates that each atom is sp2 hybridized despite the unsymmetrical bent-planar geometry. This finding is consistent with previous examples of weak C…C bondings, in which the carbon atoms involved exhibit a preference for sp2 hybridization 41, 42.

   Direct evidence for a carbon–carbon one-electron σ-bond

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   Does a short contact represent a bonding orbital between carbon atoms?

   • From a theoretical point of view, the coefficients of the SOMO indicate that a bonding orbital between the carbon atoms in close proximity was not formed since they reside on the nodal plane. Thus, a detailed investigation is needed to verify whether this short contact represents a bond or is due merely to physical proximity.

   Direct evidence for a carbon–carbon one-electron σ-bond

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2. www.chemistryworld.com › news › beyond-hydrogenBeyond hydrogen bonding: new definitions for secondary ...

   www.chemistryworld.com › news › beyond-hydrogen

   ‘The hydrogen bond is an attractive interaction between a hydrogen atom from a molecule or a molecular fragment X–H in which X is more electronegative than H, and an atom or a group of atoms in ...

3. www.britannica.com › science › chemical-bondingChemical bonding | Definition, Types, & Examples | Britannica

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   Sep 20, 2024 · Chemical bonding, any of the interactions that account for the association of atoms into molecules, ions, crystals, and other species. When atoms approach one another, their electrons interact and tend to distribute themselves in space so that the total energy is lower than it would be in any alternative arrangement.

4. www.nature.com › articles › d41586/024/03138-2Carbon bond that uses only one electron seen for first time ...

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   Sep 26, 2024 · For a little more than a century, chemists have believed that strong atomic links called covalent bonds are formed when atoms share one or more electron pairs. Now, researchers have made the...

   • Author: Katherine Bourzac

5. www.nature.com › articles › s41586/024/07965-1Direct evidence for a carbon–carbon one-electron σ-bond

   www.nature.com › articles › s41586/024/07965-1

   Sep 25, 2024 · The one-electron oxidation of a hydrocarbon with an elongated C–C single bond provides direct evidence for a one-electron σ-bond between carbon atoms.

6. www.britannica.com › science › chemical-bondingChemical bonding - Quantum Mechanics, Electrons, Atoms ...

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   Sep 20, 2024 · Broadly speaking, in VB theory a bond between atoms A and B is formed when two atomic orbitals, one from each atom, merge with one another (the technical term is overlap), and the electrons they contain pair up (so that their spins are ↓↑).

7. www.britannica.com › science › chemical-bondingMolecular shapes and VSEPR theory - Encyclopedia Britannica

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   Sep 20, 2024 · The theory of molecular shape known as valence-shell electron-pair repulsion (VSEPR) theory grew out of Lewis ’s theory, and, like that approach to bonding, VSEPR focuses on the role of electron pairs.

8. www.thoughtco.com › definition-of-hydrogen-bond-605872Hydrogen Bond Definition and Examples - ThoughtCo

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   Oct 7, 2024 · A hydrogen bond is a type of attractive (dipole-dipole) interaction between an electronegative atom and a hydrogen atom bonded to another electronegative atom. This bond always involves a hydrogen atom. Hydrogen bonds can occur between molecules or within parts of a single molecule.