Deuterium isotope effects on the partial molal volumes of cyclohexane, acetone, and acetonitrile in carbon tetrachloride

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Abstract
At 25 °C both molar volumes V and partial molal volumes [Formula: see text] in carbon tetrachloride of cyclohexane-d12 and of acetone-d6 are smaller than V and [Formula: see text] of the corresponding protio compounds. However, both V and [Formula: see text] of acetonitrile-d3 are larger than V and [Formula: see text] of acetonitrile-h3, and in solvent cyclohexane [Formula: see text] of acetone-d6 and of acetone-h6 are approximately equal. Apparently deuteration has not only a steric effect, but (in polar compounds) a counter-balancing effect, which may be polar.

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