The vibrational spectra and structure of diiminosuccinonitrile and N,N′-dichlorodiiminosuccinonitrile

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Abstract

The i.r. spectra of diiminosuccinonitrile and N,N′-dichlorodiiminosuccinonitrile were recorded as Nujol mulls, as pellets in KBr and polyethylene matrices and as solutions in CH3CN in the region 4000-30 cm−1. Raman spectra of the pure solids were obtained and polarization data were recorded from saturated solutions in CH3CN.

The mutual exclusion of i.r. and Raman lines revealed that both compounds existed in the trans conformation and no additional conformers (gauche or cis) were detected in solution.

The fundamental frequencies for both molecules were assigned on basis of i.r. and Raman activities, Raman polarization data and the results of normal coordinate analyses.

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