Stationary and pulsed photolysis and pyrolysis of 1,1-dimethylsilacyclobutane

Journal Article · Thu Dec 14 04:00:00 EST 1989 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100362a011· OSTI ID:6725189

Brix, T; Arthur, N L; Potzinger, P ^[1]

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1. Max-Planck-Institut fuer Strahlenchemie, Ruhr (Germany, F.R.)

A study of the photolysis of 1,1-dimethylsilacyclobutane at 147-214 nm shows that of the four primary processes identified the predominant mode of decomposition is to C{sub 2}H{sub 4} and dimethylsilaethene. Evidence from experiments in the presence of SF{sub 6} suggests that the dimethylsilaethene is formed initially in a vibrationally excited state. Laser pulsed photolysis experiments at 193 nm have been carried out to measure the absorption spectrum of Me{sub 2}SiCH{sub 2}, its absorption cross section, and the rate constant for Me{sub 2}SCH{sub 2} combination. The values obtained are {sigma} (240 nm, base e) = (1.0 {plus minus} 0.2) {times} 10{sup {minus}17} cm{sup 2} and k{sub 7} = (3.3 {plus minus} 0.8) {times} 10{sup {minus}11} cm{sup 3} s{sup {minus}1}. The kinetics of the pyrolysis of Me{sub 2}SiCH{sub 2}CH{sub 2}CH{sub 2} have also been reexamined.

• OSTI ID: 6725189
• Journal Information: Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 93:25; ISSN 0022-3654; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400200* -- Inorganic
Organic
& Physical Chemistry
400800 -- Combustion
Pyrolysis
& High-Temperature Chemistry
CALCULATION METHODS
CHEMICAL REACTIONS
DATA
DATA ANALYSIS
DECOMPOSITION
EXPERIMENTAL DATA
INFORMATION
KINETICS
MEASURING INSTRUMENTS
MEASURING METHODS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SILICON COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PYROLYSIS
REACTION KINETICS
THERMOCHEMICAL PROCESSES