Results 251 to 260 of about 390,267 (298)

Dissociation Chemistry of 3-Oxetanone in the Gas Phase

Journal of Physical Chemistry A, 2017
3-Oxetanone is a strained cyclic molecule which plays an important role in synthetic chemistry. A few studies exist in the literature about the equilibrium properties of this molecule and the dissociation patterns of substituted 3-oxetanones. For the unsubstituted 3-oxetanone, formation of ketene (CH2CO) and formaldehyde (HCHO) was considered to be the
Manikandan Paranjothy
exaly   +3 more sources

Orbital specific chemistry: Controlling the pathway in single-molecule dissociation

Journal of Chemical Physics, 2005
A scanning tunneling microscope (STM) was used to control the pathway of the dissociation of single O2 molecules chemisorbed on Ag(110) at 13K. Tunneling of electrons from the STM tip into the O2 caused dissociation of the molecule, giving rise to two adsorbed O atoms separated along the [11¯0] direction. In contrast, the ejection of electrons from the
Wilson Ho
exaly   +3 more sources

Letter: Intercluster Chemistry of Protonated and Sodiated Betaine Dimers upon Collision Induced Dissociation and Electron Induced Dissociation

European Journal of Mass Spectrometry, 2008
The collision induced dissociation and electron induced dissociation spectra of the [2M + H]+ and [2M + Na]+ clusters of the zwitterionic amino acid, betaine (M), have been examined in a hybrid linear ion trap Fourier transform ion cyclotron resonance mass spectrometer.
Linda Feketeová, George N Khairallah, Richard A O'hair   +2 more
exaly   +3 more sources

Gas-Phase Dissociation Chemistry of Deprotonated RGD

Journal of the American Society for Mass Spectrometry, 2020
We investigate the structure and dissociation pathways of the deprotonated amphoteric peptide arginylglycylasparic acid, [RGD-H]-. We model the pertinent gas-phase structures and fragmentation chemistry of the precursor anions and predominant sequence-informative bond cleavages (b2+H2O, c2, and z1 peaks) and compare these predictions to our tandem mass
Shanshan Guan, Jordan M. Rabus, Philippe Maître, Benjamin J. Bythell   +3 more
openaire   +2 more sources

INVESTIGATION OF THE DISSOCIATION CHEMISTRY OF NF2 COMPOUNDS

1963
Abstract : Thermal dissociation experiments using adiabatic compression as the means of heating were discontinued. A study of the adiabatic compression process in the TEI apparatus showed that because of the mechanical properties of the compressor and the high thermal conductivity of helium, a maximum temperature constant enough for kinetic and ...
P. L. Goodfriend, U. V. Henderson
openaire   +2 more sources

Theoretical investigation of the dissociation chemistry of formyl halides in the gas phase

Physical Chemistry Chemical Physics, 2020
Halogen substituted analogues of formaldehyde, HXCO (X = F, Cl, Br, and I), play a crucial role in the degradation of stratospheric ozone.
Anchal Gahlaut, Manikandan Paranjothy
openaire   +2 more sources

Chemistry Models for Air Dissociation

1996
The main problem of air dissociation description at high temperatures is the thermal non-equilibrium of reactant in strong shock waves. The concept of thermal non-equilibrium is peculiar to chemical reacting system without equilibrium between vibrational and translational degrees of freedom for reacting molecules. In order to elaborate and frame models
S. A. Losev, E. A. Kovach, V. N. Makarov, M. Ju. Pogosbekjan, A. L. Sergievskaya   +4 more
openaire   +1 more source

Dissociation of the Ethyl Radical: An Exercise in Computational Chemistry

Journal of Chemical Education, 2014
A set of exercises for use in a typical physical chemistry laboratory course are described, modeling the unimolecular dissociation of the ethyl radical to form ethylene and atomic hydrogen. Students analyze the computational results both qualitatively and quantitatively.
Nahal Nassabeh, Mark Tran, Patrick E. Fleming   +2 more
openaire   +1 more source

Intriguing roles of reactive intermediates in dissociation chemistry of N-phenylcinnamides

Organic & Biomolecular Chemistry, 2012
In mass spectrometry of protonated N-phenylcinnamides, the carbonyl oxygen is the thermodynamically most favorable protonation site and the added proton is initially localized on it. Upon collisional activation, the proton transfers from the carbonyl oxygen to the dissociative protonation site at the amide nitrogen atom or the α-carbon atom, leading to
Cheng, Guo, Kezhi, Jiang, Lei, Yue, Ziming, Xia, Xiaoxia, Wang, Yuanjiang, Pan   +5 more
openaire   +2 more sources

Protonated α-N-Acetyl Galactose Glycopeptide Dissociation Chemistry

Journal of the American Society for Mass Spectrometry, 2022
We recently provided mass spectrometric, H/D labeling, and computational evidence of pyranose to furanose N-acetylated ion isomerization reactions that occurred prior to glycosidic bond cleavage in both O- and N-linked glycosylated amino acid model systems (Guan et al. Phys. Chem. Chem. Phys., 2021, 23, 23256-23266).
Jordan M. Rabus, Shanshan Guan, Lauren M. Schultz, Maha T. Abutokaikah, Philippe Maître, Benjamin J. Bythell   +5 more
openaire   +2 more sources