id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
iajs-530	Hussein, Shaymaa T.; Ali, Emad T.; Ali, Khalid F.; Tomma, Jombod H.	Evidence Supports The Formation Of Isoimides Derived From Pyromellitic Dianhydride	2017	9	.pdf	application/pdf	3406	230	70	760 cm-1 for asymmetry and symmetry of C-N-C (cyclic) , in addition to ,a good peak around 1625 cm-1 for C=N group and a stretching band around 1720 cm-1 due to C=O group of lactone ring . The mechanism involves nucleophilic addition reaction[13] as follows : Acetone RT OO O O O O R NH2 C C O O O O O O NH R H Proton exchange C C O O O O OH N R H O	cache/iajs-530.pdf	txt/iajs-530.txt