Raman spectroscopic studies of halide-ion complexes of carbon tetrahalides in solution
- 1 January 1972
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 20,p. 2254-2257
- https://doi.org/10.1039/dt9720002254
Abstract
The Raman spectra of solutions containing tetra-alkylammonium chlorides or bromides and CCl4 or CBr4 in non-hydrogen bonding solvents show evidence of 1 : 1 complexes X–,CBr4 present in ion pairs with the cation. From Raman intensity measurements the formation constant for [Bu4N]+CBr4Cl– at 20 °C is 4·8 l mol–1 in MeCN and 2·0 l mol–1 in CH2Cl2 solution. Evidence is presented from changes in vibration frequencies and Raman depolarization ratios of CBr4 on complexing that in CBr4Cl– the chloride ion is bound to a face rather than an apex or edge of the CBr4 tetrahedron.Keywords
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