Abstract
The reactive rate of adduct formation in solid phase reaction has been examined with reference to its length of fatty acid chain. Quantitative analysis of the amount of urea adduct is made by using X-ray, in which two reflection i.e. (100) reflection (7.14Å) of adduct and (003) reflection (9.113.3Å) of fatty acid are used for its calibration curve. As a result, it has been disclosed that the shorter the length of the fatty acid chain is, the greater the reactive rate of adduct formation becomes.Followed this the reactive rate of urea adduct formation has been investigated under various conditions and it has been recognized all the reaction are explained well by Jander's rate equation. The apparent activation energy obtained by Arrhenius's equation are as follows; C-12 : 31.1, C-14 : 26.1, C-16 : 22.0, C-13 : 22.9, C-15 : 19.2, C-17 : 15.6kcal/mol, which shows that the activation energy is decreased with the increase of the carbon number of the guest molecule fatty acid and there exists zigzag relation between even and odd membered fatty acids.
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