Collision-induced elimination of alkenes from deprotonated unsaturated ethers in the gas phase. Reactions involving specific .beta.-proton transfer

1990 ◽  
Vol 112 (7) ◽  
pp. 2537-2541 ◽  
Author(s):  
Russell J. Waugh ◽  
Roger N. Hayes ◽  
Peter C. H. Eichinger ◽  
K. M. Downard ◽  
John H. Bowie
Keyword(s):  
Proton Transfer ◽  
Gas Phase ◽  
Gas Phase Reactions

An experimental study of the reactivity of the hydroxide anion in the gas phase at room temperature, and its perturbation by hydration

1981 ◽  
Vol 59 (11) ◽  
pp. 1615-1621 ◽  
Author(s):  
Scott D. Tanner ◽  
Gervase I. Mackay ◽  
Diethard K. Bohme
Keyword(s):  
Experimental Study ◽  
Proton Transfer ◽  
Gas Phase ◽  
Rate Constants ◽  
Room Temperature ◽  
Gas Phase Reactions ◽  
Flowing Afterglow ◽  
Hydroxide Anion

Flowing afterglow measurements are reported which provide rate constants and product identifications at 298 ± 2 K for the gas-phase reactions of OH− with CH3OH, C2H5OH, CH3OCH3, CH2O, CH3CHO, CH3COCH3, CH2CO, HCOOH, HCOOCH3, CH2=C=CH2, CH3—C≡CH, and C6H5CH3. The main channels observed were proton transfer and solvation of the OH−. Hydration with one molecule of H2O was observed either to reduce the rate slightly and lead to products which are the hydrated analogues of the "nude" reaction, or to stop the reaction completely, k ≤ 10−12 cm3 molecule−1 s−1. The reaction of OH−•H2O with CH3—C≡CH showed an uncertain intermediate behaviour.

Marcus theory and the existence or non-existence of transition states in gas phase deprotonation of carbon acids

1984 ◽  
Vol 62 (8) ◽  
pp. 1465-1469 ◽  
Author(s):  
Saul Wolfe
Keyword(s):  
Proton Transfer ◽  
Gas Phase ◽  
Transition States ◽  
Marcus Theory ◽  
Energy Change ◽  
Transfer Reactions ◽  
Gas Phase Reactions ◽  
Proton Transfer Reactions ◽  
Carbon Acids ◽  
Computational Level

At the 3-21G (3-21G*) computational level, the intrinsic barriers associated with proton transfer between XCH2− and CH3X have been found to be essentially constant (ca. 10 kcal/mol) for X = H, F, SH, Cl. According to the Marcus rate-equilibrium treatment of proton transfer reactions, this result means that transition states should not exist for gas phase reactions [Formula: see text], when the energy change exceeds 20 kcal/mol. This prediction has been confirmed for two cases (X = H, F) in which the energy change is less than 20 kcal/mol, and two cases (X = SH, Cl) in which the energy change is greater than 20 kcal/mol.

ChemInform Abstract: GAS PHASE REACTIONS, IONIZATION BY PROTON TRANSFER TO SUPEROXIDE ANIONS

1974 ◽  
Vol 5 (42) ◽  
pp. no-no
Author(s):  
I. DZIDIC ◽  
D. I. CARROLL ◽  
R. N. STILLWELL ◽  
E. C. HORNING
Keyword(s):  
Proton Transfer ◽  
Gas Phase ◽  
Superoxide Anions ◽  
Gas Phase Reactions

Gas-Phase Reactions of Carbocations with Amines. Isotope Effects in Proton Transfer

1994 ◽  
Vol 98 (23) ◽  
pp. 5931-5934 ◽  
Author(s):  
Giuseppi Laguzzi ◽  
Thomas H. Osterheld ◽  
John I. Brauman
Keyword(s):  
Proton Transfer ◽  
Gas Phase ◽  
Isotope Effects ◽  
Gas Phase Reactions

ChemInform Abstract: Collision-Induced Elimination of Alkenes from Deprotonated Unsaturated Ethers in the Gas Phase. Reactions Involving Specific β-Proton Transfer.

ChemInform ◽  
1990 ◽  
Vol 21 (29) ◽  
Author(s):  
R. J. WAUGH ◽  
R. N. HAYES ◽  
P. C. H. EICHINGER ◽  
K. M. DOWNARD ◽  
J. H. BOWIE
Keyword(s):  
Proton Transfer ◽  
Gas Phase ◽  
Gas Phase Reactions

scholarly journals Gas Phase Reactions of 1,3,5-Triazine: Proton Transfer, Hydride Transfer, and Anionic σ-Adduct Formation

2011 ◽  
Vol 22 (7) ◽  
pp. 1260-1272 ◽  
Author(s):  
John M. Garver ◽  
Zhibo Yang ◽  
Shuji Kato ◽  
Scott W. Wren ◽  
Kristen M. Vogelhuber ◽  
...  
Keyword(s):  
Proton Transfer ◽  
Gas Phase ◽  
Hydride Transfer ◽  
Adduct Formation ◽  
Gas Phase Reactions

Gas phase reactions. Ionization by proton transfer to superoxide anions

1974 ◽  
Vol 96 (16) ◽  
pp. 5258-5259 ◽  
Author(s):  
I. Dzidic ◽  
D. I. Carroll ◽  
R. N. Stillwell ◽  
E. C. Horning
Keyword(s):  
Proton Transfer ◽  
Gas Phase ◽  
Superoxide Anions ◽  
Gas Phase Reactions

The gas phase reactions of the trichloromethylium ion with alkyl aromatics, studied by high pressure mass spectrometry

1985 ◽  
Vol 63 (10) ◽  
pp. 2608-2613 ◽  
Author(s):  
John Alfred Stone ◽  
Nancy Joan Moote ◽  
Anastasia C. M. Wojtyniak
Keyword(s):  
Mass Spectrometry ◽  
High Pressure ◽  
Proton Transfer ◽  
Gas Phase ◽  
Rate Constants ◽  
Negative Temperature ◽  
Specific Rate ◽  
Gas Phase Reactions ◽  
Temperature Coefficients ◽  
Primary Products

The reactions of trichloromethylium (CCl3+) with benzene and the lower alkyl aromatics (ArH) have been studied by high pressure mass spectrometry at pressures in the range 2–4 Torr and temperatures from 300 to 560 K. The only two primary products are the adduct ArHCCl3+ and ArCCl2+, which is formed by loss of HCl from the adduct. The relative yields of adduct increase with increasing number of methyl substituents on the aromatic ring (benzene → mesitylene). The disappearance of CCl3+ is kinetically second order with specific rate constants increasing from benzene to mesitylene, the latter reacting essentially at every ion–molecule collision. All rate constants are fairly large (>1010 cc molecule−1 s−1) and show negative temperature coefficients. ArCCl2+ is unreactive but ArHCCl3+ reacts further by proton transfer to ArH.

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