Mechanism of Skeletal Isomerization of<i>n</i>-Butane Using 1,4-<sup>13</sup>C<sub>2</sub>-<i>n</i>-Butane on Solid Strong Acids
作者:Tetsuo Suzuki、Toshio Okuhara
DOI:10.1246/cl.2000.470
日期:2000.5
Mechanism of skeletal isomerization of n-butane over Cs2.5H0.5PW12O40 as well as sulfated ZrO2 was revealed at a temperature range 393 - 523 K by using 1,4-13C2-n-butane. 13C-Distributions of isobutane at 393 K were close to binomial distribution, indicating a bimolecular pathway. On the other hand, an intramolecular (monomolecular) rearrangement became significant over Cs2.5H0.5PW12O40 at 523 K.
在 393 - 523 K 的温度范围内,利用 1,4-13C2 正丁烷揭示了正丁烷在 Cs2.5H0.5PW12O40 和硫酸化 ZrO2 上的骨架异构化机理。393 K 时异丁烷的 13C 分布接近二项分布,表明存在双分子途径。另一方面,在 523 K 时,Cs2.5H0.5PW12O40 的分子内(单分子)重排变得很重要。