Short, strong (low barrier) hydrogen bonds occur when the pK values of the atoms sharing the proton are similar. The overall distance is 2.5 Å or less, the deuterium fractionation factor is less than 0.5, the proton NMR chemical shift can approach 20 ppm, and deuterium or tritium ...
Hydrogen bonds are electrostatic interactions that occur when a hydrogen atom binds to an electronegative atom. Learn about chemical bonding, explore how hydrogen bonds form, discover the differences between intramolecular forces and intermolecular forces, then review an example of how these bonds are us...
The more intermolecular forces the molecule has, the more energy will be required to disrupt these bonds when melting or boiling compounds, thus raising the observed temperatures from expected relative to their mass. In addition, hydrogen bonds requirepolarbonds in the molecule and H-Bond Donor pro...
Hydrogen bond could occur in the locally specific location and exist in the entire structure. Moreover, its directionality endows the selectivity for 2D materials binding biomaterials and controls the structure of 2D biomaterials. The multiple hydrogen bonds system also could prompt a high degree of ...
Low-Barrier Hydrogen Bonds and Enzymatic Catalysis Short, strong (low barrier) hydrogen bonds occur when the pK values of the atoms sharing the proton are similar. The overall distance is 2.5 Å or less, ... W W.,Cleland - 《Archives of Biochemistry & Biophysics》 被引量: 1371发表: 200...
What are the necessities for hydrogen bonds to occur? Electronegativity: Electronegativity is a dimensionless property of an element that refers to its tendency to attract electrons of a bond towards itself. When elements that share a pair of electrons have equal electronegativity values, they share ...
Short, strong (low barrier) hydrogen bonds occur when the pK values of the atoms sharing the proton are similar. The overall distance is 2.5 Å or less, ... WW Cleland,MM Kreevoy - 《Science》 被引量: 1231发表: 2000年 Low-barrier hydrogen bonds and enzymic catalysis. Presents examples...
Although hydrogen bonds form between hydrogen and any other electronegative atom, the bonds within water are the most ubiquitous (and some would argue, the most important). Hydrogen bonds form between neighboring water molecules when the hydrogen of one atom comes between the oxygen atoms of its ...
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Hydrogen bonds often occur in networks—frequently with water mediating. Water is especially facile at hydrogen bonding because it is both an acceptor and a donor. Histidines can have various protonation states, and an analysis of the hydrogen bonds can allow a determination of the most likely ...