Die Oxydation von isopropylbenzol zu Cumolhydroperoxid mit Ozon als Initiator

Wagner, G.

doi:10.1002/prac.19650270508

Cited by 5 publications

(1 citation statement)

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“…58,59 The formation of peroxy radicals is confirmed by chemiluminescence induced by oxidation of hydrocarbons with the above mixture due to disproportionation of the peroxy radicals. 55,60 Deuterated hydrocarbons are oxidised by ozone more slowly, which suggests that the ozone attack at the C7H and C7D bonds is a limiting step of the oxidation. 53, 61 ± 65 The oxidation of hydrocarbons by ozone in carbon tetrachloride yields alkyl chlorides: Ozone is decomposed in the gas phase at elevated temperatures to generate molecular and atomic oxygen; the latter initiates the formation of radicals:…”

Section: Generation Of Radicals By Ozone-induced Bimolecular Reactionsmentioning

confidence: 99%

Generation of radicals by bimolecular reactions

Денисов

Denisova

2002

Russ. Chem. Rev.

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Section: Generation Of Radicals By Ozone-induced Bimolecular Reactionsmentioning

confidence: 99%

Generation of radicals by bimolecular reactions

Денисов

Denisova

2002

Russ. Chem. Rev.

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Expoxide bei der Flüssigphasen‐Oxidation von Olefinen

Greiner

1966

Angewandte Chemie

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Surface‐active Compounds

1966

Angew. Chem. Int. Ed. Engl.

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gives two signals with the aa' assignment. The protons of the CH2 group in ( 3 ) have orientations between axial and equatorial, namely the positions bb' andf', respectively. We found only a small degree of splitting for this group. The protons are on the border of the plane and the out-of-plane regions, i.e. the shielding between 6 and 6' is about the same, as isthat between f andf'. Sincetheinfluenceof dd'presumably is small, owing to the larger distance from the carbonyl bond, averaging of the effects of all positions a-f and a'-f' on the anisotropy shows that freely rotating methyl groups give signals corresponding to the out-of-plane region.I n (4) the freely rotating CH: group shows two signals corresponding to the ou-tof-plane region, the CH group signal pair corresponding to the plane region. This shows that in (4) a conformation in which the C H proton lies in the plane of the amide group is slightly preferred. Our assignment for the plane region agrees with theoretical calculations [61, which are in contradiction to the assignment for freely rotating methyl groups. Our assignments were made by the benzene dilution method, double resonance, and for (4) by F-C-C-N-C-H long-range coupling, to which cis > trans applies. An independent assignment follows from compound (5) with a fixed amide CONFERENCE REPORTSgroup, for which we found T = 6.4 for HI and T = 5.4 for H2. The isopropyl group in (5) has the same orientation as in (4). Comparison of amides with thioamides in the spectra of N,N-dimethylacetamide and N,N-dimethylthioacetamide by long-range coupling and the benzene dilution method shows their magnetic anisotropies to be opposite. In thioamides the plane region evidently has a larger cone of influence, so that the assignment of the freely rotating methyl group coincides with that of the plane region. Received: August 8th, 1966 [Z 307 I€] Germafi version: Angew. Chem. 78, 943 (1966)

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Die Oxydation von isopropylbenzol zu Cumolhydroperoxid mit Ozon als Initiator

Cited by 5 publications

References 10 publications

Generation of radicals by bimolecular reactions

Generation of radicals by bimolecular reactions

Expoxide bei der Flüssigphasen‐Oxidation von Olefinen

Surface‐active Compounds

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