Organic and biological spectrochemical studies. XXVIII. Electron spin resonance spectra of some polynuclear aromatic hydrocarbon ions

1970 ◽  
Vol 48 (12) ◽  
pp. 1942-1945 ◽  
Author(s):  
J. T. Cooper ◽  
W. F. Forbes ◽  
J. C. Robinson
Keyword(s):  
Electron Spin Resonance ◽  
Aromatic Hydrocarbon ◽  
Electron Spin ◽  
Aromatic Hydrocarbons ◽  
Boron Trifluoride ◽  
Polynuclear Aromatic Hydrocarbons ◽  
Oxidizing Agent ◽  
Polynuclear Aromatic Hydrocarbon ◽  
Spin Resonance ◽  
Anions And Cations

The electron spin resonance spectra are presented for the anions and cations of the polynuclear aromatic hydrocarbons anthanthrene, benz[ghi]perylene, benz[e]pyrene, dibenz[fg,op]naphthacene, and dibenz[a,c]triphenylene. The cation of dibenz[fg,op]naphthacene is shown to form a dimer under certain conditions.The usefulness of a new oxidizing agent for the production of the cations, boron trichloride, has been investigated and was found to afford comparable spectra to boron trifluoride, using sulfur dioxide as solvent.

Radical cations of some substituted pyrenes

1970 ◽  
Vol 48 (13) ◽  
pp. 1996-1999 ◽  
Author(s):  
J. T. Cooper
Keyword(s):  
Electron Spin Resonance ◽  
Sulfur Dioxide ◽  
Chlorine Atom ◽  
Electron Spin ◽  
Hyperfine Splitting ◽  
Boron Trifluoride ◽  
Radical Cations ◽  
Molecular Orbital Calculations ◽  
Spin Resonance ◽  
First Time

The electron spin resonance spectra of several substituted pyrene cations, produced by oxidation with boron trifluoride in sulfur dioxide, are reported. The spectra are analyzed and the splitting constants given. With 4-chloropyrene, hyperfine splitting is observed due to the chlorine atom, for the first time in such a species. Molecular orbital calculations (Hückel and McLachlan) are presented for three of the compounds studied.

scholarly journals Correlation of Polynuclear Aromatic Hydrocarbon Formation Between Pyrolysis and Smoking

1977 ◽  
Vol 9 (1) ◽  
Author(s):  
R. F. Severson ◽  
W. S. Schlotzhauer ◽  
R. F. Arrendale ◽  
M. E. Snook ◽  
H. C. Higman
Keyword(s):  
Molecular Weight ◽  
Aromatic Hydrocarbon ◽  
Petroleum Ether ◽  
High Molecular Weight ◽  
Cigarette Smoke ◽  
Aromatic Hydrocarbons ◽  
Polynuclear Aromatic Hydrocarbons ◽  
Polynuclear Aromatic Hydrocarbon ◽  
Cigarette Smoke Condensate ◽  
Hydrocarbon Formation

AbstractTobacco, its petroleum ether (PE) extract, and the residual extracted tobacco (marc) were pyrolyzed at 650-750°C, 650-850°C, and 700°C, respectively. Analyses of the polynuclear aromatic hydrocarbons (PAH) produced showed that the pyrolysis of the tobacco and the PE extract at 700°C produced PAH profiles comparable to those found in cigarette smoke condensate (CSC). The data indicated that most of the alkyl PAH and the major PAH in cigarette smoke are derived from the PE extractables of tobacco. The constituents of the marc were the major precursors for phenols, oxygenated PAH, and Iow molecular weight acids; and those of PE extract were the major producers of high molecular weight acids.

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