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. Can. J. Chem. 55,3596 (1977). 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. Chem. 55,3596 (1977). On ttudie la dtcomposition thermique entre 80 et 130°C du phtnyl-3 n-butyl-3 diazirine et du phenyl-3 mtthyl-3 diazirine dans le DMSO et I'acide acttique. Les composts diazo intermtdiaires sont respectivemei~t le phtnyl-1 diazo-l pentane et le phenyl-1 diazo-1 tthane. Ces derniers ont t t t dktectts et isolts. La dtcomposition du phtnyl-3 n-butyl-3 diazirine et la dtcomposition ulttrieure de son intermtdiaire le phtnyl-1 diazo-1 pentane sont un bon exemple de rtactions successives. On determine les paramktres cinttiques pour les rtactions d'isomtrisation et de decomposition. L'isomtrisation du phtnyl-3 methyl-3 diazirine en phtnyl-1 diazo-1 tthane est d'ordre 1 et probablement unimoltculaire, mais les cinttiques des rtactions ulttrieures du phenyl-1 diazo-1 tthane sont compliqutes par plusieurs processus qui entrent en compttition.[Traduit par le journal]

Die Belichtung des Diels‐Alder‐Addukts (I) in Benzol ergibt ein 1:2‐Gemisch der tricyclischen Ketone (II) und (III).

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