Thermolysis of 2,2-dimethoxy-5,5-dimethyl- 3- 1,3,4- oxadiazoline studied with photoelectron spectroscopy. He(I) photoelectron spectrum of dimethoxycarbene

Gas phase thermolysis of 2,2-dimethoxy-5,5-dimethyl- Δ 3 -1,3,4-oxadiazoline (1) in an ultraviolet photoelectron spectrometer by means of a CW CO 2 laser as directed heat source at 26 W gave a complex PE spectrum that included ionization bands belonging to acetone, tetramethoxyethylene (3), and dimethyl oxalate (4). Subtraction of the spectra of acetone, 3, and 4 from the pyrolysis spectrum of 1 left a simple PE spectrum that is attributed to …