The t-C4H9OCH2 radical in the gas phase: Detection by multiphoton ionization and the reactions with O, O2, O3, H, and NO

✍ Scribed by Walter Hack; Karlheinz Hoyermann; Frank Nacke

• Book ID: 104270702
• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 246 KB
• Volume: 28
• Category: Article
• ISSN: 1540-7489
• DOI: 10.1016/s0082-0784(00)80545-7

✦ Synopsis

The detection of the t-C 4 H 9 OCH 2 and the CH 3 OCH 2 radical by the multiphoton ionization/mass spectrometry/discharge fast flow reactor technique has been investigated in the wavelength region k ‫ס‬ 420-530 nm. For both radicals, unstructured bands were observed.

The rate of the five reactions of the t-C 4 H 9 OCH 2 radical with O, O 2 , O 3 , H, and NO have been determined with reference to the corresponding CH 3 OCH 2 radical reactions in the temperature range of 249-684 K at low pressure (around 2 mbar) t-C H OCH ‫ם‬ O → products 4 9 2 14 0.46 ‫ע‬ 0.15 3 ‫1מ‬ ‫1מ‬ k ‫ס‬ (1.80 ‫ע‬ 0.5) • 10 (T/300 K) cm mol s (253 Յ T/K Յ 684) (1) 1 t-C H OCH ‫ם‬ O → products 4 9 2 2 11 ‫1.1מ‬ ‫ע‬ 0.2 3 ‫1מ‬ ‫1מ‬ k ‫ס‬ (6.7 ‫ע‬ 0.04) • 10 (T/300 K) cm mol s (2) 2 t-C H OCH ‫ם‬ O → products 4 9 2 3 12 ‫3.0ע37.0מ‬ 3 ‫1מ‬ ‫1מ‬ k ‫ס‬ (6.7 ‫ע‬ 0.1) • 10 (T/300 K) cm mol s (249 Յ T/K Յ 363) (3) 3 t-C H OCH ‫ם‬ H products 4 9 2 13 ‫1.0ע05.0מ‬ 3 ‫1מ‬ ‫1מ‬ k ‫ס‬ (2.5 ‫ע‬ 0.1) • 10 (T/300 K) cm mol s (4) 4 t-C H OCH ‫ם‬ NO → products 4 9 2 10 ‫6.0ע5.1‬ 3 ‫1מ‬ ‫1מ‬ k ‫ס‬ (2.6 ‫ע‬ 0.1) • 10 (T/300 K) cm mol s (5) 5

The formation of the primary products is discussed on the basis of mass spectrometric detection using low-energy electron impact ionization.