Activation Volume as a Clue to Transition State Structure
The relationship of molar volume to molecular structure and properties is not discussed to any extent in physical chemistry textbooks. One such neglected principle is the additivity of molar volume which was first noted by H. Kopp in 1842. Although it holds best for corresponding states, as for example the boiling points, it is surprisingly reliable for room temperature as shown in Table I. Strong forces of association such as hydrogen bonding cause a slight decrement at temperatures well below the boiling point. Accurate estimates of density can be derived from the additivity principle.
KeywordsMolar Volume Activation Volume Maleic Anhydride Transition State Structure Hydride Transfer
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