a stoichiometric ratio 1 1 fig4 fig5 shows the fourier transform infrared ftir spectrum of asa glutamic acid and the formed complex while table 2 presents the bands frequencies of each of asa and glutamic acid that are affected as a result of their interaction as glutamic acid is an amino acid characterized by the presence of an amino group and two carboxylic groups it was noticed that the stretching and bending bands of the quaternary nitrogen bands wave numbers were decreased reflecting electron donation from the nh 3 consequently there was an increase in the wave number of the stretching band of c u2014 n from 1352 to 1356 cm u2212 1 reflecting an electron withdrawing effect however the bands of carboxylic groups were not affected on the other hand the effect of the interaction on the ftir spectrum of asa was noticed through the band of the c u2550 o of the carboxylic group where it was slightly shifted towards lower frequency value from 1690 to 1686 cm u2212 1 at the same time the bands of c u2550 o of the aryl ester of asa did not show any changes in its wave numbers this data may reflect an interaction between the carboxylate and the quaternary nitrogen asa glutamic acid complex dmso d 6 2 25 3h s ch 3 c u2550 o 7 2 1h d j 8 hz c 3 u2014 h 7 38 1h t j 15 7 5 hz c 5 u2014.