Abstract
A substitution method, in which the 1:1 complex between β-cyclodextrin (cycloheptaamylose) and phenolphthalein forms competitively with a β-cyclodextrin-alcohol complex, has been used to obtain equilibrium constants for complexes of the C 4 to C 10 alcohols and several other compounds containing aliphatic moieties. The logarithm of the complex formation constant is found to vary nearly linearly with the number of carbon atoms in a series of n-aliphatic alcohols. Similar results are obtained for β-cyclodextrin complexes of two C 12 surfactants (sodium dodecylsulfate and hexa-ethyleneglycol monododecyl ether), cyclohexanol, and 1, 10-decanediol.
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