The Gamma Ray-Induced Addition of Acetaldehyde to Cyclohexene and Normal Hexene

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Abstract
By the radiation-induced telomerization of acetaldehyde-hexene mixtures, McHK has been produced when cyclohexene is used, while MnHK and MiHK have been produced when normal hexene is used. The G(MnHK) at room temperature has been found to be 400 (dose rate=9.7×104r/hr.), which is larger by a factor of ten than the G(MiHK) and the G(McHK). Irrespective of the dose rate, a G(MnHK)>G(McHK)>G(MiHK) relation always exists. It has been found that: (i) the G(MnHK) value, as well as the G(MiHK) and the G(McHK) values, increases with the rise in temperature, they all show however, maxima at 70∼80°C, because of the thermal decomposition of the acetyl radical, (ii) sharp maxima are shown in the curves of G(telomer) vs. initial composition at 5 mol.% of hexenes, (iii) the analytical data of the gaseous products establish that the radiation-induced decomposition of aldehyde and hexene occurs in parallel with the telomerization, and (iv), upon the addition of benzene or cyclohexane to the system, the G(telomer)’s decrease slightly in both systems, suggesting that they act as diluents rather than as agents of the energy transfer.

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