A weak absorption in iodine vapour was reported by earlier workers to not obey Beer's Law, and was
attributed to the dimer I₄. The ultraviolet spectrum of iodine vapour was reinvestigated in this study on a more quantitative basis. The extinction coefficients have been found to be independent of concentration of iodine (10 ̄⁵ to 10 ̄² M), pressure of an inert gas (up to 1 atm), and temperature
(25°C to 220°C, except for the usual temperature broadening). The absorption continuum (maximum 2694±3 A; oscillator strength 4.98 ±. 05 x 10 ̄⁴) must be due to a transition in the free molecule to a repulsive state correlating with either ²P3/2 + ²P3/2 or ²P3/2 + ²P1/2 atoms. The identification of the upper state involved and of the mechanism allowing the transition to occur were not possible with the available evidence. The previous identification of I₄ in solution and of Br₄ in the vapour phase, determined by similar ultraviolet continua, are discussed in relation to the lack of evidence for I₄ in the vapour phase found in this study. / Science, Faculty of / Chemistry, Department of / Graduate
| Identifer | oai:union.ndltd.org:UBC/oai:circle.library.ubc.ca:2429/35903 |
| Date | January 1967 |
| Creators | Mintz, Kenneth Jose |
| Publisher | University of British Columbia |
| Source Sets | University of British Columbia |
| Language | English |
| Detected Language | English |
| Type | Text, Thesis/Dissertation |
| Rights | For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use. |
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