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Infrared spectra of heterocumulenes. I. Influence of substituents on the infrared Influence of substituents on the infrared spectral bands of νas(NCN) of some aromatic carbodiimides

Š. Stankovský and Š. Kováč

Department of Organic Chemistry, Slovak Technical University, 880 37 Bratislava

 

Abstract: The influence of substituents on molar absorptivities, integrated absorption intensities and half-band widths of vas(NCN) of twelve aromatic carbodiimides has been discussed. A linear relationship between integrated absorption intensities (log A) and Hammett σ and σ+ substituent constants has been observed (ρ = 0.449 and ρ+ = 0.247 respectively). The spectral data suggest that the — N = C = N — group of carbodiimides examined is electron-donating.

Full paper in Portable Document Format: 282a230.pdf

 

Chemical Papers 28 (2) 230–233 (1974)

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