A HeI photoelectron spectrum of the (CH3CH2CH2)(2)N radical

The HeI photoelectron spectrum (PES) of the (CH3CH2CH2)(2)N radical is obta ined by pyrolysis of di-propylnitrosamine (CH3CH2CH2)(2)NNO at 615 +/- 0.5 degrees C. Except for obvious PES bands of the NO species, at least four ne w PES bands emerge in the PE spectrum of the pyrolysis products of the (CH3 CH2CH2)(2)NNO compound. In order to assign the PES bands of (CH3CH2CH2)(2)N , an improved density functional theory calculation has been carried out. A sharp peak with the lowest ionization energy at 8.36 +/- 0.02 eV comes fro m electron ionization of the HOMO(4b(1)) of the (CH3CH2CH2)(2)N radical, co rresponding to the ionization of (CH3CH2CH2)(2)N((XB1)-B-2) to (CH3CH2CH2)( 2)N+(X(1)A(1)). (C) 2000 Elsevier Science B.V. All rights reserved.