Evidence Supports The Formation Of Isoimides Derived From Pyromellitic Dianhydride

Autor: Shaymaa T. Hussein, Emad T. Ali, Khalid F. Ali, Jombod H. Tomma
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Zdroj: Ibn Al-Haitham Journal for Pure and Applied Sciences, Vol 26, Iss 1 (2017)
Druh dokumentu: article
ISSN: 1609-4042
2521-3407
Popis: Some new mono isoimides of asymmetrical pyromillitdiimide derived from pyromellitic dianhydride were synthesized and studied by their melting points , FTIR , and 1HNMR spectroscopy and C.H.N analysis (for some of them) and it was proved that the mechanism of the formation of these isoimides followed , the mechanism suggested by Cotter et al . by using N, N─- dicyclohexylcarbodiimide as dehydrating agent , in spite of the groups attached to the phenyl moiety as mentioned in literatures .
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