氢键(Hydrogen Bonding)是一种在分子间发挥重要作用的相互作用力。在新陈代谢、物质运输和生物体系中,氢键起着至关重要的作用。本文将对一种具有代表性的分子——氨(NH3)与水(H2O)之间的氢键作用进行分析。 氢键的形成 氨气在水溶液中能够形成氢键,这使得氨分子在水溶液中的行为与它在纯水中的行为有所不同。氢键...
Binding energies for hydrogen bonding are typically on the order of 1000–3000 cm −1 , whereas van der Waals bonds have energies in the range of 100–300 cm −1 . The relevance of hydrogen bonding is demonstrated by the fact that it is directly responsible for the secondary structure ...
SCF MO LCGO Studies on hydrogen bonding: The system NH 3 · H 2 OThe energy hypersurface of the system NH3 · H2O is investigated for a number of different internuclear geometries. In the minimum energy structure involving a linear hydrogen bond, NH3 acts as proton acceptor. The binding ...
Does PH3 have hydrogen bonding? Hydrogen Bonding Definition: Hydrogen bonding is one of a group of attractive forces that work to bring molecules and atoms together but without the sharing or exchanging of electrons. Others include ion-dipole attraction, dipole-dipole interaction (of which hydrogen...
Define hydrogen chloride. hydrogen chloride synonyms, hydrogen chloride pronunciation, hydrogen chloride translation, English dictionary definition of hydrogen chloride. n. A colorless, pungent gas, HCl, that forms hydrochloric acid when dissolved in wat
What are the properties of water that are due to hydrogen bonding? Why is hydrogen bonding only possible with hydrogen? What kind of bond holds together atoms within a molecule? Do hydrogen bonds share electrons? What covalent bonds in the sulfamic acid (NH2SO3H) and water molecule (H2O) mus...
The decrease in the intensity of ND3+ torsional mode is found to be similar to that of undeuterated -glycine. The pressure-induced stiffening of ND and CD2 stretching modes are discussed in the context of changes in the hydrogen-bonding interactions. Copyright 2011 John Wiley & Sons, Ltd. ...
Hydrogen bonding in hexamminemetal(II) bromides [M(NH3)6]Br2 (M2+ = Ca2+, Mn2+, Fe2+, Co2+, Ni2+, Cu2+, Cd2+) --- synergetic effect of M2+ IR spectra of isotypic hexamminemetal(II) bromide salts [M(NH 3 ) 6 ]Br 2 (K 2 PtCl 6 -type structure for M 2+ = Ca 2+...
An analysis of the hydrogen bond in BASE-HF complexes using the theory of atoms in molecules The nature, energetics and mechanism of BASE-HF hydrogen bonding (where BASE = OC, SC, N2, HCN, H3N, O3, SCO, CO2, N2O, SO2, H2CO, H2O, HF, H3P, H2S and HC... MT Carroll,RFW Bader...
TD-DFT Study on the Excited-State Hydrogen Bonding of the p-Cresol–NH3–H2O ComplexTheoretical or Mathematical/ bond lengthsdensity functional theoryexcited statesground stateshydrogen bondsinfrared spectraintermolecular forcesmolecular configurationsmolecule-photon collisions...