Linear free energy relationship of the energy of the CTTS transition of Halide ions with the solvatochromic parameter α
A linear free energy relationship was found between vmax, the energy of the absorption maximum of chloride, bromide, or iodide ion in various solvents, and the α solvatochromic parameter which is a measure of the hydrogen bond donor ability of the solvent. The relationships are: for chloride, vmax=6.99α+50.16 kK; for bromide, vmax=5.52α+45.20 kK; for iodide, vmax=5.02α+40.33 kK. The correlation of vmax for iodide ion with α gave a larger correlation coefficient and smaller standard deviation than a correlation with the ET(30) parameter of Dimroth. From the values of vmax for iodide ion and the solvated electron in liquid ammonia at 25°C, these correlations indicate a preliminary value of 0.00 for the α parameter of liquid ammonia. This had not been reported before and is lower than expected from a general knowledge of the physical and chemical properties of liquid ammonia but is consistent with a more detailed consideration and recent gas phase measurements of hydrogen bond donor strength. © 1989 Plenum Publishing Corporation.
Journal of Solution Chemistry
Linear free energy relationship of the energy of the CTTS transition of Halide ions with the solvatochromic parameter α.
Journal of Solution Chemistry,
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