The Near Infra-Red Absorption Spectra of Some Halogen Derivatives of Ethane
Abstract
The infra-red absorption spectra of the following derivatives of ethane, C2H5Br, C2H5I, CH2Cl.CH2Cl, CH2Cl.CH2Br, CH2Br.CH2Br, CH3.CHCl2, CH3.CHBr2, CH2Cl.CHCl2, CHCl2.CHCl2, CCl3.CHCl2, CCl3.CCl3, CCl2.CCl2, CHBr2.CHBr2, CHCl.CHCl, between 0.8μ and 3μ by means of two different spectrometers, one using a grating of 2500 lines per inch and the other using a grating of 10000 lines per inch. Tables listing spectrometer settings, wave-lengths and wave-numbers are included. A large number of new absorption bands were discovered. It was found that for substances containing no hydrogen no bands existed in the region under investigation. For other substances there was a close similarity in the spectra, particularly where the halogens were interchanged. The bands do not lend themselves to arrangement in a single series, nor does any quantitative relationship exist between the bands in any given substances. No explanation of the mechanism producing the absorption is offered.
- Publication:
-
Physical Review
- Pub Date:
- September 1929
- DOI:
- 10.1103/PhysRev.34.730
- Bibcode:
- 1929PhRv...34..730S