Intermolecular Force - Hydrogen Bonding

Hydrogen Bonding

A hydrogen bond is the attraction between the lone pair of an electronegative atom and a hydrogen atom that is bonded to either nitrogen, oxygen, or fluorine. The hydrogen bond is often described as a strong electrostatic dipole–dipole interaction. However, it also has some features of covalent bonding: it is directional, stronger than a van der Waals interaction, produces interatomic distances shorter than sum of van der Waals radii, and usually involves a limited number of interaction partners, which can be interpreted as a kind of valence.

Intermolecular hydrogen bonding is responsible for the high boiling point of water (100 °C) compared to the other group 16 hydrides that have no hydrogen bonds. Intramolecular hydrogen bonding is partly responsible for the secondary, tertiary, and quaternary structures of proteins and nucleic acids. It also plays an important role in the structure of polymers, both synthetic and natural.

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Other articles related to "hydrogen bonding, hydrogen, bonding":

Histidine - Chemical Properties - NMR
... This indicates that the N-1-H tautomer is preferred, it is presumed due to hydrogen bonding to the neighboring ammonium ... This change in chemical shifts can be explained by the presumably decreased hydrogen bonding of an amine over an ammonium ion, and the favorable hydrogen bonding ...
Source of Dispersive Adhesion Attractions - Hydrogen Bonding
... Sometimes grouped into the chemical mechanism of adhesion, hydrogen bonding can increase adhesive strength by the dispersive mechanism ... Hydrogen bonding occurs between molecules with a hydrogen atom attached to a small, electronegative atom such as fluorine, oxygen or nitrogen ... This bond is naturally polar, with the hydrogen atom gaining a slight positive charge and the other atom becoming slightly negative ...
Molecular Attraction - Hydrogen Bonding
... A hydrogen bond is the attraction between the lone pair of an electronegative atom and a hydrogen atom that is bonded to either nitrogen, oxygen, or ... The hydrogen bond is often described as a strong electrostatic dipole–dipole interaction ... However, it also has some features of covalent bonding it is directional, stronger than a van der Waals interaction, produces interatomic distances shorter than sum of van der Waals radii, and ...
Steroid Delta-isomerase - Mechanism
... a proton from position 4 of the steroid ring to form an enolate that is stabilized by the hydrogen bond donating Tyr-14 and Asp-99 ... The hydrogen bonds from Tyr-14 and Asp-99 are known to significantly affect the rate of catalysis in KSI ... located adjacent to Tyr-14 and within hydrogen bonding distance of O-3 ...
Beta Sheet - Structure and Orientation - Hydrogen Bonding Patterns
... Adjacent β strands can form hydrogen bonds in antiparallel, parallel, or mixed arrangements ... inter-strand stability because it allows the inter-strand hydrogen bonds between carbonyls and amines to be planar, which is their preferred orientation ... In this case, if two atoms and are adjacent in two hydrogen-bonded β strands, then they form two mutual backbone hydrogen bonds to each other's flanking peptide ...

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