Abstract
In order to reveal whether the H atom (s) directly bonded to α-carbon in each aliphatic ether can participate in T-for-H exchange reaction, the T-for-H exchange reaction between the ether having normal chain structure and the T-labeled compound was observed at 20°C under the equilibrium conditions. The reaction was carried out in the liquid-solid system. Each ether used includes an atom having lone pairs, and the ethers are diethyl ether, 2, 2'-dichlorodiethyl ether, and 1, 2-dichloroethyl ethyl ether. In the exchange reaction, poly (vinyl alcohol) having T-labeled OH groups (i.e., OT group) was used as a solid sample material, and each ether dissolved in p-xylene was used as a liquid sample material. For comparison, Biphenyl ether was also used in this work (50-80°C) . The concentration of the solution was set at 0.5 mol⋅dm-3, respectively. Based on the results obtained in this work, the following four have been clarified. (1) The reaction mass of diethyl ether is the same as that of 2, 2'-dichloro diethyl ether, and the mass of 1, 2-dichloroethyl ethyl ether is about 3/4 times that of the former two materials. (2) The H atoms bonded to α-carbon in each ether can participate in the T-for-H exchange reaction when they contact with T-labeled compound. (3) Comparing the rate constant for diphenyl ether with that for other materials previously obtained (by using the A″-McKay plot method), Biphenyl ether has a similar ability to aniline and benzaldehyde for causing this exchange reaction. In other words, H atoms bonded to α-carbon in certain ethers have a similar reactivity to those of both -NH2 in aniline and -CHO in benzaldehyde. (4) H atoms bonded to α-carbon in ethers seem to cause not only T-for-H exchange reaction, but also other chemical reaction (s) .
