Infra-red absorption spectra and molecular structure of triatomic molecules

Abstract

This report is written as a résumé of investigations of infra -red absorption spectra of triatomic molecules carried out during tenure of a Senior Research Award. It might have been written in thesis form giving details of experimental and other work, but much of this has already been published, and copies of the papers have been sent the Department; these papers run into some hundred pages of print, and a thesis would merely form unnecessary repetition occupying almostdouble thib number of typewritten pages. A resume which brings together the results, and gives the now well established methods of interpreting infra -red absorption spectra of triatomic molecules, seems therefore the more satisfactory form for the report.Published work will be referred to as follows: 'Investigations in the Infra -Red Region of the Spectrum' (1). Part I (Froc. Roy. Soc., 1930, A, 130, 133). || (2). Part II. (ibis, 1930, A, 130, 142). || (3). Part III. (ibid, 1931, A, 132, 236). || (4). Part IV. (ibid, 1931, A, 132, 252). || (5). Part V. (ibid, 1932, A, 135, 375). || (6). Part VI. (ibid, 1932, A, 137, 622).- || (7). Fart VII. (ibid, 1932, A, 138, 531). || (8). Part VIII. (ibid, 1933, A, 140, 193). || (a). Part IX. (ibid, 1933, A, 142, 129). || (b). Part X (ibid, 1934, A, 145, 338). || (9). 'Infra -Red and Raman Bands of Carbon Dioxide, Carbonyl Sulphide, and Carbon Disulphide'. (Z. Physik, 1932, 79, 35). || (10). 'Molecular Configuration of N20.' (Phys. Rev., 1932, 39, 534). || (11). 'Infra -Red Absorption Spectrum of Nitrogen Dioxide'. || (Nature, 1933, 131, 239). (12). 'The Asymmetrical Rotator and its Infra -Red Spectrum'. (Trans. Faraday Soc., 1930, XXVI, 197). || (13). 'A Method of Eliminating Magnetic Disturbance of High Sensitivity Galvanometers'. (J. Sci. Inst., 1930, VII). || (14). 'Structure of Triatomic I.Iolecules'. A. B. D. Cassie (Nature, 1933, 131, 438). || (15). 'Investigations of the Infra -Red Absorption Spectra of Sulphur Dioxide, Carbon Disulphide, and Carbonyl Sulphide'. A thesis for the Ph.D. degree at London University, by A. B. D. Cassie, June 1931. || (16). 'Investigations in the Infra -Red Region of the Spectrum Part XI - The Absorption Spectrum and Molecular Configuration of Boron Trichioride, and the Effect of Strain on Plane Groups of the Type XYs. (Proc. Roy. Soc., 1935, A, 148, 87).This work has been published in collaboration with Mr. C. R. Bailey, Lecturer at University College, London, apart from references (13), (14), (15), and (16).