Abstract The configurational assignment of Z and E nitrogen derivatives (chemical structure image) of 3, 5, 5-trimethyl-2-cyclohexen-1-one was made taking into consideration the through-space effects on oxime, O-methyloxime, dimethylhydrazone, tert-butylimine, N, N, N- trimethylhydrazonium iodide and oxime hydrochloride derivatives. The relationship between the magnitude of the chemical shifts of the α-protons and the dihedral angle formed by the ...