A unified scale for predicting non-specific solvent polarity employs the physicochemical properties of solutes, such as NMR, EPR, electronic transitions, etc., and the equation Ax = S'P + W in order to produce a scale of non-specific solvating ability. This approach is successful due to the exclusion of data for systems where donor-acceptor interactions exist. In this paper, the Unified Scale is extended t o include systems in polar acceptor solvents by using the equation Ax = Paper 3/03068G
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