Jul 31 2017

Hydrogen bond – definition of hydrogen bond by The Free Dictionary #hydrogen #bonds #definition


hydrogen bond

A chemical bond in which a hydrogen atom of one molecule is attracted to an electronegative atom, especially a nitrogen, oxygen, or fluorine atom, usually of another molecule.

hydrogen bond

(Chemistry) a weak chemical bond between an electronegative atom, such as fluorine, oxygen, or nitrogen, and a hydrogen atom bound to another electronegative atom. Hydrogen bonds are responsible for the properties of water and many biological molecules

hy drogen bond`

an electrostatic bond between a hydrogen atom in a covalent bond and an electronegative atom, as oxygen.

hydrogen bond

A chemical bond in which a hydrogen atom that is already bonded to an atom in a molecule forms a second bond with another atom, either in the same molecule or in a different one. The second atom is usually of a type that strongly attracts electrons, such as nitrogen or oxygen.

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Researchers added an edible oligosaccharide, [beta]-cyclodextrin, during film preparation to form hydrogen bond interactions with propionic acid.

Most of these “anomalous” properties of water–which are by no means mysterious, unpredictable, or abnormal–depend on the extremely weak hydrogen bonding, so weak that a hydrogen bond does not survive for more than a tiny fraction of a second.

Specifically, by inducing a hydrogen bond within a molecular, the new reagent obtains high-reactive aminated oligonucleotide in a few minutes with improved purification efficiency.

Just one tiny tweak in a hydrogen bond is enough to let the microbes pick out the phosphate they need to build their DNA–while keeping arsenic out.

Effect of water on the hydrogen bond formation in Estonian kukersite kerogen as revealed by molecular modeling // Fuel.

Previous studies have used single-crystal x-ray diffraction to explore the use of bis- and trisphenols in crystal engineering and the interaction of this type of phenol, acting as a hydrogen bond donor, with hexamethylenetetramine, (C[H.

It is found that the spectra are highly sensitive to solvent polarity but are insensitive to solvent hydrogen bond donor or acceptor strength.

Also, the photon energy carried by such waves is millions of times less than that needed to break a hydrogen bond and thereby damage living tissue.

Both hydrogen-bonding functional groups must be within approximately an atomic diameter for the hydrogen bond to form.

Part 2 explains forces acting at long range between closed-shell atoms or molecules, focusing on the van der Waals bond and the hydrogen bond .

Some of our knowledge has come from the study of the simple water dimer [5-9], the gaseous adduct of two molecules linked by a single hydrogen bond (see Figure 2).

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