Charge transfer complexes between halogens and pyridines. Part 4.—Effect of the acid strength of the acceptors

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Abstract
Charge transfer equilibria between bromine, iodine, iodine chloride and iodine bromide as acceptors and various meta and para-substituted pyridines as donors have been studied spectrophotometrically in carbon tetrachloride at 30°C. Formation constants of the complexes have been correlated with Hammett's substituent constants, ionization constants of the donors and acid strength of the acceptors. Correlations with intermolecular and/or interhalogen spectral parameters are also discussed.

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