Group Stretching frequency (cm-1) primary amide 3450 Aromatic C-H 2927 Cyclic C-H 2857 ON 1563 C=O 1637 N-N=O (Nitroso) 1452 Secondary amide 1418

Table 2 : IR Data of compound N-nitroso-2,6-diphenylpiperidin-4-one semicarbazone.