The nonstatistical dissociation dynamics of chloride(bromomethane) Cl-(CH3Br): evidence for vibrational excitation in the products of gas-phase SN2 reactions

1991 ◽  
Vol 113 (25) ◽  
pp. 9696-9697 ◽  
Author(s):  
Susan T. Graul ◽  
Michael T. Bowers
Keyword(s):  
Gas Phase ◽  
Vibrational Excitation ◽  
Sn2 Reactions ◽  
Dissociation Dynamics

Collision-induced dissociation dynamics of Ar2+ at high levels of vibrational excitation

2000 ◽  
Vol 112 (24) ◽  
pp. 10880-10889 ◽  
Author(s):  
Yu-hui Chiu ◽  
Steve Pullins ◽  
Dale J. Levandier ◽  
Rainer A. Dressler
Keyword(s):  
Vibrational Excitation ◽  
Collision Induced Dissociation ◽  
Dissociation Dynamics

scholarly journals The effect of adenine protonation on RNA phosphodiester backbone bond cleavage elucidated by deaza-nucleobase modifications and mass spectrometry

2019 ◽  
Vol 47 (14) ◽  
pp. 7223-7234 ◽  
Author(s):  
Elisabeth Fuchs ◽  
Christoph Falschlunger ◽  
Ronald Micura ◽  
Kathrin Breuker
Keyword(s):  
Mass Spectrometry ◽  
Gas Phase ◽  
Vibrational Excitation ◽  
Bond Cleavage ◽  
Low Energy ◽  
Biological Processes ◽  
Phosphodiester Backbone ◽  
Collisionally Activated Dissociation ◽  
Rna Backbone ◽  
Ionic Hydrogen Bonds

Abstract The catalytic strategies of small self-cleaving ribozymes often involve interactions between nucleobases and the ribonucleic acid (RNA) backbone. Here we show that multiply protonated, gaseous RNA has an intrinsic preference for the formation of ionic hydrogen bonds between adenine protonated at N3 and the phosphodiester backbone moiety on its 5′-side that facilitates preferential phosphodiester backbone bond cleavage upon vibrational excitation by low-energy collisionally activated dissociation. Removal of the basic N3 site by deaza-modification of adenine was found to abrogate preferential phosphodiester backbone bond cleavage. No such effects were observed for N1 or N7 of adenine. Importantly, we found that the pH of the solution used for generation of the multiply protonated, gaseous RNA ions by electrospray ionization affects phosphodiester backbone bond cleavage next to adenine, which implies that the protonation patterns in solution are at least in part preserved during and after transfer into the gas phase. Our study suggests that interactions between protonated adenine and phosphodiester moieties of RNA may play a more important mechanistic role in biological processes than considered until now.

Photoinitiation of Gas-Phase SN2 Reactions through the Evans−Polanyi Excited State Surface

1997 ◽  
Vol 119 (21) ◽  
pp. 5067-5068 ◽  
Author(s):  
Caroline E. H. Dessent ◽  
Mark A. Johnson
Keyword(s):  
Excited State ◽  
Gas Phase ◽  
Sn2 Reactions

Gas-phase SN2 reactions at silicon and carbon centers. An experimental appraisal of theory

1976 ◽  
Vol 98 (4) ◽  
pp. 894-899 ◽  
Author(s):  
J. D. Payzant ◽  
K. Tanaka ◽  
L. D. Betowski ◽  
D. K. Bohme
Keyword(s):  
Gas Phase ◽  
Carbon Centers ◽  
Sn2 Reactions

Charge Distributions of Gas-phase SN2 Reactions: ABEEM-σπ Method Compared with Potential Acting on an Electron in a Molecule

2015 ◽  
Vol 44 (8) ◽  
pp. 1074-1076 ◽  
Author(s):  
Yanli Ding ◽  
Xiaojing Han ◽  
Changliang Sun ◽  
Jirong Mu
Keyword(s):  
Gas Phase ◽  
Sn2 Reactions ◽  
Charge Distributions
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