MFT/NC MFT/NC-Cr MFT/NC-Zn Assignment 3409 3421 3408 -OH and -NH2 stretching 2921,2855 - 2921,2855 -CH symmetric stretching of aliphatic groups 1651 1641 1649 -C=O asymmetric stretching 1447 1441 1447 - C=O symmetric stretching 1230 1245 1240 -Carboxyl group symmetric stretching 1078 1065 1078 -CO stretching of alcoholic group. - 617 - - NH-Crstretching band

Table 2: FTIR bands in AC and M FT/AC.