Abstract

Ten overtone and combination bands of iso-dicyanoacetylene (NC3NC), produced by in situ pulsed ultraviolet laser photoisomerization of dicyanoacetylene in an argon matrix, have been assigned in our Fourier-transform absorption spectra. Experimental band frequencies, relative band intensities, and derived anharmonicity constants are compared in detail to CEPA-1 theoretical calculations. The agreement here, even for overtone band intensities, is excellent.

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