EXCITED MOLECULES AS THE REACTIVE SPECIES IN ACTIVE NITROGEN

1954 ◽  
Vol 32 (4) ◽  
pp. 399-403 ◽  
Author(s):  
R. A. Back ◽  
Margaret Menzies ◽  
C. A. Winkler
Keyword(s):  
Thermal Decomposition ◽  
Reactive Species ◽  
Active Nitrogen ◽  
Electronic Level ◽  
Decomposition Reactions ◽  
Condensed Discharge ◽  
Excited Molecules

No reaction has been detected between ethylene and nitrogen molecules obtained in the thermal decomposition of metallic azides. Since such decomposition reactions apparently produce nitrogen molecules excited to the same electronic level as those present in active nitrogen formed by a condensed discharge, it might be inferred that excited molecules are not the reactive species in active nitrogen.

THE REACTION OF ACTIVE NITROGEN WITH MIXTURES OF ETHYLENE AND NITRIC OXIDE

1965 ◽  
Vol 43 (7) ◽  
pp. 1899-1904 ◽  
Author(s):  
E. Fersht ◽  
R. A. Back
Keyword(s):  
Nitric Oxide ◽  
Nitrogen Atom ◽  
Active Nitrogen ◽  
Atom Concentration ◽  
Condensed Discharge ◽  
Excited Molecules ◽  
True Measure ◽  
Concerted Reaction

The reaction of active nitrogen, produced in a condensed discharge at 1 mm pressure, with mixtures of ethylene and nitric oxide has been studied with mixtures ranging in composition from pure ethylene to pure nitric oxide. The sum of HCN + 14N16N produced from mixtures of C2H4 and 15NO remained constant and equal to the HCN produced from pure C2H4 for NO concentrations up to 50 mole %. As more NO was added, this sum rose towards the value of 14N15N produced from pure 15NO. These data appear to lend support to the HCN yield from ethylene as the true measure of nitrogen atom concentration. It is suggested that 15NO also undergoes a concerted reaction with excited 14N14N molecules, probably in the A3 Σu+ state, to produce 14N15N, and that these excited molecules can be quenched by collision with ethylene or methane without consuming nitrogen or forming HCN.

Non-Isothermal Decomposition Kinetic of Polypropylene/Hydrotalcite Composite

2019 ◽  
Vol 19 (11) ◽  
pp. 7493-7501 ◽  
Author(s):  
Sheng Xu ◽  
Min Zhang ◽  
Siyu Li ◽  
Moyu Yi ◽  
Shigen Shen ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermal Decomposition ◽  
Nitrogen Atmosphere ◽  
Heating Rates ◽  
Decomposition Reactions ◽  
Kinetic And Thermodynamic Parameters ◽  
Málek Method ◽  
Boundary Reaction ◽  
Phase Boundary Reaction ◽  
Thermal Stability Of

P3O5-10 pillared Mg/Al hydrotalcite (HTs) as a functional fire-retarding filler was successfully prepared by impregnation-reconstruction, where the HTs was used to prepare polypropylene (PP) and HTs composite (PP/HTs). Thermal decomposition was crucial for correctly identifying the thermal behavior for the PP/HTs, and studied using thermogravimetry (TG) at different heating rates. Based on single TG curves and Málek method, as well as 41 mechanism functions, the thermal decompositions of the PP/HTs composite and PP in nitrogen atmosphere were studied under non-isothermal conditions. The mechanism functions of the thermal decomposition reactions for the PP/HTs composite and PP were separately “chemical reaction F3” and “phase boundary reaction R2,” which were also in good agreement with corresponding experimental data. It was found that the addition of the HTs increased the apparent activation energy Ea of the PP/HTs comparing to the PP, which improved the thermal stability of the polypropylene. A difference in the set of kinetic and thermodynamic parameters was also observed between the PP/HTs and PP, particularly with respect to lower ΔS≠ value assigned to higher thermal stability of the PP/HTs composite.

Thermal decomposition reactions of carboxybenzenediazonium salts. I. 1,4-Dehydroaromatic compounds from o-carboxybenzenediazonium salts

1970 ◽  
Vol 35 (10) ◽  
pp. 3328-3332 ◽  
Author(s):  
Rita. Hoyos de Rossi ◽  
Hector E. Bertorello ◽  
Roberto A. Rossi
Keyword(s):  
Thermal Decomposition ◽  
Decomposition Reactions

Consecutive reactions in the thermal decomposition of phenylalkyldiazirines

1977 ◽  
Vol 55 (20) ◽  
pp. 3596-3601 ◽  
Author(s):  
Michael T. H. Liu ◽  
Barry M. Jennings
Keyword(s):  
Thermal Decomposition ◽  
Kinetic Parameters ◽  
Diazo Compounds ◽  
First Order ◽  
Temperature Range ◽  
Decomposition Reactions ◽  
Consecutive Reactions ◽  
Rate Processes ◽  
Subsequent Decomposition

The thermal decomposition of phenyl-n-butyldiazirine and of phenylmethyldiazirine in DMSO and in HOAc have been investigated over the temperature range 80–130 °C. The intermediate diazo compounds, 1-phenyl-1-diazopentane and 1-phenyldiazoethane respectively have been detected and isolated. The decomposition of phenyl-n-butyldiazirine and the subsequent decomposition of its product, 1-phenyl-1-diazopentane, are an illustration of consecutive reactions. The kinetic parameters for the isomerization and decomposition reactions have been determined. The isomerization of phenylmethyldiazirine to 1-phenyldiazoethane is first order and probably unimolecular but the kinetics for the subsequent reactions of 1-phenyldiazoethane are complicated by several competing rate processes.

Comparative studies between the thermal decomposition reactions of lanthanide(III) oxalates and malonates

1991 ◽  
Vol 177 ◽  
pp. 273-284 ◽  
Author(s):  
Kenzo Nagase ◽  
Hiroko Yokobayashi ◽  
Kazuo Muraishi ◽  
Masae Kikuchi
Keyword(s):  
Thermal Decomposition ◽  
Comparative Studies ◽  
Decomposition Reactions

scholarly journals Thermal decomposition reactions of acetaldehyde and acetone on Si(100)

1997 ◽  
Vol 15 (3) ◽  
pp. 1146-1154 ◽  
Author(s):  
J. L. Armstrong ◽  
J. M. White ◽  
M. Langell
Keyword(s):  
Thermal Decomposition ◽  
Decomposition Reactions

Superfast thermal decomposition reactions of polymers and crystallohydrates

1995 ◽  
Vol 44 (5) ◽  
pp. 1113-1120 ◽  
Author(s):  
O. F. Shlensky
Keyword(s):  
Thermal Decomposition ◽  
Decomposition Reactions
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