Results 101 to 110 of about 1,959,300 (262)

O–H hydrogen bonding promotes H-atom transfer from α C–H bonds for C-alkylation of alcohols

Science, 2015
A trio helps activate C-H bonds in alcohols Enzymes can accelerate chemical reactions by activating specific portions of a molecule through well-placed H bonds. Jeffrey et al. showcase the power of H-bonding in a synthetic context.
J. Jeffrey, Jack A. Terrett, D. MacMillan   +2 more
semanticscholar   +1 more source

Quantum Confinement in Hydrogen Bond [PDF]

arXiv, 2015
In this work, the quantum confinement effect is proposed as the cause of the displacement of the vibrational spectrum of molecular groups that involve hydrogen bonds. In this approach the hydrogen bond imposes a space barrier to hydrogen and constrains its oscillatory motion.
arxiv  

Estimation of the Energy of Hydrogen Bonds Formed in Crystals. III. Amides [PDF]

, 1960
Ariyuki Aihara
openalex   +1 more source

SOLITONS IN HYDROGEN-BONDED CHAINS

Le Journal de Physique Colloques, 1988
A one dimensional model for hydrogen bonded chains is investigated by including the dynamical degrees of freedom of the oxygens and thus generalizing the original Antonchenko-Davydov-Zolotaryuk model. Analytical solutions are derived within a continuum approximation up to second order so that rather narrow solutions could be derived accurately enough ...
D. Hochstrasser, Michel Peyrard, Helmut Büttner, H. Desfontaines   +3 more
openaire   +4 more sources

Contribution of hydrogen bonds to protein stability

Protein Science, 2014
Our goal was to gain a better understanding of the contribution of the burial of polar groups and their hydrogen bonds to the conformational stability of proteins.
C. Pace, Hailong Fu, K. Fryar, John D. Landua, Saul R. Trevino, D. Schell, Richard L. Thurlkill, S. Imura, J. Scholtz, K. Gajiwala, J. Ševčík, Ľ. Urbániková, Jeffery K. Myers, K. Takano, E. Hebert, B. Shirley, G. Grimsley   +16 more
semanticscholar   +1 more source

Notizen: First Overtone NH Band Splitting and Intramolecular NH ... X Hydrogen Bonds [PDF]

, 1963
P. J. Krueger
openalex   +1 more source

Near Equivalence of Polarizability and Bond Order Flux Metrics for Describing Covalent Bond Rearrangements [PDF]

arXiv
Identification of the breaking point for the chemical bond is essential for our understanding of chemical reactivity. The current consensus is that a point of maximal electron delocalization along the bonding axis separates the different bonding regimes of reactants and products.
arxiv  

Asymmetric propagation of electronic wave function through molecular bonding and anti-bonding states [PDF]

arXiv, 2011
Electron transport through molecular bridge shows novel quantum features. Propogation of electronic wave function through molecular bridge is completely different than individual atomic bridge employed between two contacts. In case of molecular bridge electronic wave propagators interfere and effect conduction through molecular bonding and anti-bonding
arxiv  

Intramolecular Hydrogen Bonds. IX. Intramolecular Hydrogen Bonding in ω-Haloalkanols [PDF]

, 1967
Nobuo Mōri, Emiko Nakamura, Yojiro Tsuzuki   +2 more
openalex   +1 more source

Rethinking hydrogen-bond kinetics [PDF]

arXiv, 2013
At the fundamental level, our understanding of water hydrogen-bond dynamics has been largely built on the detailed analysis of classical molecular simulations. The latter served to develop a plethora of hydrogen bond definitions based on different properties, including geometrical distances, topology and energetics.
arxiv