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III.—The Absorption Spectra of Cyanogen and the Cyanogen Halides

Published online by Cambridge University Press:  15 September 2014

R. B. Mooney  and
H. G. Reid
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Summary

The ultra-violet absorption spectra of C2N2, CNCl, CNBr and CNI have been photographed.

Measurements are given of band edges of the C2N2 absorption spectrum in the region 2380 A–1850 A. The influence of temperature on the relative intensities of the bands has been studied.

The long wave-length limits of the regions of continuous absorption due to the cyanogen halides are: CNCl, 2240 A; CNBr, 2540 A; CNI, 3100 A and 2150 A.

We desire to thank Dr Baker, of the Royal Observatory, Edinburgh, for making photometer records of several spectra, Dr Ludlam for his helpful interest in our work, and Imperial Chemical Industries, Ltd., for a grant towards the cost of quartz apparatus.

Type
Proceedings
Information
Proceedings of the Royal Society of Edinburgh , Volume 52 , 1933 , pp. 152 - 158
Copyright
Copyright © Royal Society of Edinburgh 1933

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References

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page 156 note * Turner, , Phys. Rev., 27, p. 397, 1926.CrossRefGoogle Scholar

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page 157 note * Lehrbuch d. chemischen Physik, p. 882, 1930.

page 157 note † Values calculated by Badger and Woo from thermochemical data for the (CN)Cl and (CN)I linkages (74·7 k.cal. and 52·0 k.cal. respectively) are in good agreement with Eucken's mean values.