Gas phase reactions between titanium(1+) and isobutylene: cationic polymerization and observation of C4H9+ (C4H8)n by high-pressure mass spectrometry

1994 ◽  
Vol 98 (2) ◽  
pp. 696-701 ◽  
Author(s):  
George M. Daly ◽  
M. Samy El-Shall
Keyword(s):  
Mass Spectrometry ◽  
High Pressure ◽  
Gas Phase ◽  
Cationic Polymerization ◽  
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.

Five vs Six Membered-Ring PAH Products from Reaction of o-Methylphenyl Radical and two C3H4 Isomers

2021 ◽  
Author(s):  
Oisin J Shiels ◽  
Matthew Brian Prendergast ◽  
John Savee ◽  
David L Osborn ◽  
Craig A. Taatjes ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Phase ◽  
Membered Ring ◽  
Gas Phase Reactions

Gas-phase reactions of the o-methylphenyl (o-CH3C6H4) radical with the C3H4 isomers allene (H2C=C=CH2) and propyne (HCºC-CH3) are studied at 600 K and 4 Torr (533 Pa) using VUV synchrotron photoionisation mass spectrometry,...

Using Gas Phase Reactions of Hexamethylene Triperoxide Diamine (HMTD) to Improve Detection in Mass Spectrometry

2018 ◽  
Vol 29 (4) ◽  
pp. 675-684 ◽  
Author(s):  
Kevin Colizza ◽  
Alexander Yevdokimov ◽  
Lindsay McLennan ◽  
James L. Smith ◽  
Jimmie C. Oxley
Keyword(s):  
Mass Spectrometry ◽  
Gas Phase ◽  
Gas Phase Reactions ◽  
Hexamethylene Triperoxide Diamine
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