Nmr Spectra.-Nmr spectra were determined at 60 MHz on a Varian A-60 spectrometer in DCCla solutions (0.001 mol of oxime in 0.5 ml of DCCla) with TMS as internal reference. Tris (dipivalomethanato) europium (III)(Alfa Inorganics, Beverly, Mass.)(20 mg) xras added to the above DCCh solutions and spectra were recorded again.
