13C NMR assignments of some amidoximes, 1,2,4‐oxa(thia)diazole‐5(4H)‐ones (thiones) and 1,2,4‐oxadiazine‐6(5H)‐ones(thiones)

13C NMR chemical shifts for some pyridyl‐containing N‐substituted amidoximes, 1,2,4‐oxadiazoles and 1,2,4‐oxadiazines bearing a thiocarbonyl group are reported. The chemical shift positions of the particular carbon atoms are discussed in view of literature knowledge and the effect of atoms or groups present. ©1998 John Wiley & Sons, Ltd.