1. Nomex is a flame resistant polymer developed by DuPont in the 1960s. It is made by polymerizing benzene-1,3-diamine and isophthaloyl chloride. a) Draw three repeating units of Nomex.  b) How many peaks will there be in the 1 H NMR spectrum of Nomex, assuming a polymer strand is infinitely long?  c) How many peaks will there be in the 13 C NMR spectrum of Nomex, assuming a polymer strand is infinitely long?

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NMR Spectroscopy

NMR stands for Nuclear Magnetic Resonance in which the study of different molecules is done based on the interaction of radiofrequency electromagnetic radiations with the nuclei of molecules placed in a strong magnetic field. A precise study of spectra of visible light and all bands of electromagnetic radiation is called spectroscopy.