Insertion, adduct formation, and elimination of alkenes in gas-phase reactions of bis(.eta.5-cyclopentadienyl)methylzirconium(1+) with nitriles

1990 ◽  
Vol 112 (12) ◽  
pp. 4778-4787 ◽  
Author(s):  
Charles S. Christ ◽  
John R. Eyler ◽  
David E. Richardson
Keyword(s):  
Gas Phase ◽  
Adduct Formation ◽  
Gas Phase Reactions

Gas Phase Adduct Reactions in MOCVD Growth of GaN

1995 ◽  
Vol 395 ◽  
Author(s):  
A. Thon ◽  
T.F. Kuech
Keyword(s):  
Activation Energy ◽  
Gas Phase ◽  
Decomposition Temperature ◽  
Adduct Formation ◽  
Gas Phase Reactions ◽  
Flow Tube ◽  
Exponential Factor ◽  
First Order ◽  
Mocvd Growth ◽  
Tube Reactor

ABSTRACTGas phase reactions between trimethylgallium (TMG) and ammonia were studied at high temperatures, characteristic to MOCVD of GaN reactors, by means of insitu mass spectroscopy in a flow tube reactor. It is shown, that a very fast adduct formation followed by elimination of methane occurs. The decomposition of TMG and the adduct - derived compounds are both first order and have similar apparent activation energy. The pre-exponential factor of the adduct decomposition is smaller, and hence is responsible for the higher full decomposition temperature of the adduct relative to that of TMG.

scholarly journals Gas Phase Reactions of Iron, Copper and Rhodium Cations with Monoterpenes

2019 ◽  
Author(s):  
Anatolii Spesyvyi
Keyword(s):  
Gas Phase ◽  
Atmospheric Chemistry ◽  
Chemical Ionization ◽  
Adduct Formation ◽  
Chemical Ionization Mass Spectrometry ◽  
Ionization Mass ◽  
Gas Phase Reactions ◽  
Ion Distributions ◽  
Iron Copper ◽  
Selective Reagent

Monoterpene hydrocarbons C10H16 are emitted by the vegetation to the atmosphere, where they participate in the atmospheric chemistry and aerosols formation. Thus there is a need to analyse their concentrations selectively with measurement time less than 1 s. This task could not be solved solely by gas chromatography and one of the possible solutions is selective reagent ions in chemical ionization mass spectrometry techniques. This study presents product ion distributions of the gas phase single collision reactions of Fe+, Cu+ and Rh+ metal cations with seven monoterpenes: α-pinene, sabinene, myrcene, 3-carene, ocimene, β-pinene and α-phellandrene. Some distinctive product ion patterns were noticed: C5H8 loss in reactions with Fe+, C10H16 adduct formation with Cu+, and series of H2 losses in with Rh+. Application of these results are discussed, particularly that a combination of few reagent ions should be utilized in order to analyse monoterpenes mixture selectively.

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

Intrinsic reactivity of metal–hydroxide complexes: O–H bond activation and adduct formation in gas-phase reactions of Cp2ZrOH+

2001 ◽  
Vol 204 (1-3) ◽  
pp. 255-266 ◽  
Author(s):  
David E. Richardson ◽  
G.H.Lisa Lang ◽  
Elisa Crestoni ◽  
Matthew F. Ryan ◽  
John R. Eyler
Keyword(s):  
Gas Phase ◽  
Bond Activation ◽  
Adduct Formation ◽  
Metal Hydroxide ◽  
Gas Phase Reactions ◽  
Intrinsic Reactivity

scholarly journals Gas Phase Reactions of Iron, Copper and Rhodium Cations with Monoterpenes

2019 ◽  
Author(s):  
Anatolii Spesyvyi
Keyword(s):  
Gas Phase ◽  
Atmospheric Chemistry ◽  
Chemical Ionization ◽  
Adduct Formation ◽  
Chemical Ionization Mass Spectrometry ◽  
Ionization Mass ◽  
Gas Phase Reactions ◽  
Ion Distributions ◽  
Iron Copper ◽  
Selective Reagent

Monoterpene hydrocarbons C10H16 are emitted by the vegetation to the atmosphere, where they participate in the atmospheric chemistry and aerosols formation. Thus there is a need to analyse their concentrations selectively with measurement time less than 1 s. This task could not be solved solely by gas chromatography and one of the possible solutions is selective reagent ions in chemical ionization mass spectrometry techniques. This study presents product ion distributions of the gas phase single collision reactions of Fe+, Cu+ and Rh+ metal cations with seven monoterpenes: α-pinene, sabinene, myrcene, 3-carene, ocimene, β-pinene and α-phellandrene. Some distinctive product ion patterns were noticed: C5H8 loss in reactions with Fe+, C10H16 adduct formation with Cu+, and series of H2 losses in with Rh+. Application of these results are discussed, particularly that a combination of few reagent ions should be utilized in order to analyse monoterpenes mixture selectively.

Gas-Phase Reactions

1981 ◽  
Author(s):  
Victor N. Kondratiev ◽  
Evgeniĭ E. Nikitin
Keyword(s):  
Gas Phase ◽  
Gas Phase Reactions
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