Excess volume data on mixing for binary mixtures of y-Butyrolactone with propan-1-01. butan-1-01. pentan-1-01. hexan-1-01, propan-2-01, 2 methyl propan-1-01, 3 methyl butan-1-01. have been determined at 303.15 K . The V 6 values are negative over the whole range of composition in mixtures containing propan-1-01, propan-2-01, butan-1-01, 2 methyl propan-1-01, and 3 methyl butan-1-01, In pentan-1-01, however. V 6 is negative at lower molefractions and positive at higher molefractions, whereas in hexan-1-01 the value of V E are positive throughout the entire concentration range, which indicates significant interaction between y-butyrolactone and the aliphatic and isomeric groups. These values are attributed to weak complex formation and predominating de-association of associated liquids by y-butyrolactone. The results are ascribed to interactions between unlike molecules.
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