Infrared Study (3700 - 3000 cm1) of Hydrogen Bonds Involving Triphenyl Derivatives of Group V Elements 来自 Semantic Scholar 喜欢 0 阅读量: 21 作者: Broekmans, G.,Zeegers-Huyskens, Th.摘要: The hydrogen bonded complexes between hydroxylic derivatives and nitrogen bases have been extensively ...
A hydrogen bond is a type of intermolecular force of attraction that is a stronger version of the dipole-dipole interaction (also an intermolecular force of attraction). Chemicals with more hydrogen bonds usually have higher boiling points because these hydrogen bo...
These observations collectively suggested that the hydrogen bonds between PPE and 2-aminochalcones might be formed. Scheme 3. Experimental mechanistic investigations. Reactivity of phosphates (a) and chalcones (b–d). Previous studies show that quinolones were identified as potent NMDA/glycine ...
Hydrogen bonding, interaction involving a hydrogen atom located between a pair of other atoms having a high affinity for electrons; such a bond is weaker than an ionic bond or covalent bond but stronger than van der Waals forces. Hydrogen bonds can exist
ChemInform Abstract: Multiple Bonds Between Main‐Group Elements and Transition Metals. Part 33. Oxidative Addition of Hydrogen Telluride to Organometallic Fragments.organo‐rhenium compoundsη5-C5Me5)Re(CO)2(THF), photochemically generated from the tricarbonyl (I), reacts with TeH 2 to give the...
This started the infrared investigations of hydrogen bonds, which became the most sensitive and the most widely applied experimental method of studying this phenomenon in clusters and in the liquid and solid phases. In the condensed phase the vibrational spectra are often determined with the Raman ...
or nitrogen of another molecule. Hydrogen bonds are naturally seen in the water. In water molecules, two hydrogen atoms are covalently bonded to an oxygen atom. Here these hydrogen atoms can form hydrogen bonds with oxygen atoms of other water molecules. This lets water molecules align i...
A triple bond forms a long thin “rod” of very small van der Waals radius which could thus fit in, while double or single bonds could not be allocated between the tyrosines for lack of space. Pi-stacking of the triple bond with the two tyrosine rings could additionally contribute to the...
The two strands are held together by hydrogen bonds that link a nitrogen atom of a nucleotide in one chain with a nitrogen or oxygen on the nucleotide that is across from it on the other chain. Efficient hydrogen bonding within this configuration can only occur between the pairs A-T and ...
This partial ionic character of covalent bonds increases with the difference in the electronegativities of the two atoms. See also ionic bond. When none of the elements in a compound is a metal, no atoms in the compound have an ionization energy low enough for electron loss to be likely. ...