No abstract

The photooxidation of CH3N2CH3 was studied at 25°in the presence of NO and N02. The reaction conditions were [CH3N2CH3] from 1.6 to 29.1 Torr, [02] from 2.3 to 30.7 Torr, h from 0.024 to 0.56 µ sec, and [NO] from 19 to 91 µ or [N02] from 31 to 142 µ. In most runs about 100 Torr of N2 was also present. Both 14N and 15N isotopes were used in the NO and N02, and the product peaks monitored mass spectrometrically. For some runs gas chromatography was also employed, and in some cases CH3I replaced CH3N2CH3 as a source of CH3 radicals. With either NO or N02 the major product of the reaction was CH30N02, though it appeared with an induction period in the NO studies. HCOOH was also produced with an induction period in both studies. Its presence strongly infers the production of CH20 as a primary product. The CH3Q2 radicals appear to react with the oxides of nitrogen via CH302 + NO -* CH302NO (10a), CH302 + NO -* CH20 + MONO (10b), CH302 + N02 -* CH20 + BONO, (12a), CH302 + N02 -* CH302N02 (12c), with kl0,/kl0 = 0.6 ± 0.1 and k12c/k12 = 0.75 ± 0.05, where kw = k20a + Ari0b and ki2 = k22a + ki2r.• There was no evidence for the reaction between CH302 and NO producing CHsO + N02, and it occurs <2% of the time. The CH302N0 molecule isomerizes to CH30N02 in a third-order reaction 2CH302N0 + 02 -»• 2CH3ON02 + 02 (11), with kn = 0.11 Torr-2 sec-1. CH302N02 apparently reacts rapidly with both N02 and NO, CH302N02 + NOz -CH3ON02 + NOs ( 14) and CH302N02 + NO -* CH3ONO + NOs (15). Of primary concern in the understanding of photo-mechanism by which nitric oxide is converted to nitrochemical smog formation is the elucidation of the gen dioxide in urban atmospheres. It is well known that the third-order reaction with oxygen (k = 7 X(1) Environmental Protection Agency Air Pollution Trainee.

No abstract

Das Allylcyclohexandion (I) reagiert mit tert‐Butylhypochlorit zum Chlorid (II), das in siedendem Xylol in Gegenwart von Soda zum Cyclopentenon (III) umgelagert wird.

No abstract

No abstract