id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
iajs-833	Ali, E. T.; AL-Aliawy, , K. M. Lazim; Tomma, J. H.	Synthesis and Characterization of New Symmetrical Pyromellitdiimide Derivatives and Their Amic Acids	2016	12	.pdf	application/pdf	3341	206	70	The FTIR-absorption spectrum showed the disappearance of absorption bands due to C=O (amid) and N-H groups of acid hydrazide together with the appearance of a stretching bands at 1630 cm -1, 1308 cm-1, 3102 cm-1 which are assigned to C=N, C=S and N-H groups, respectively of oxadiazole unit . [VII] Na Na 2CH3CO2H H3C C O O C O CH3 O O O O NHNH O O O O O C CH3 O OCH3C O R R The structure of these compounds was studied by FTIR, UV-Vis and 1 HNMR spectroscopy.	cache/iajs-833.pdf	txt/iajs-833.txt