The Thermal Decomposition of Tin Hydride.
The Thermal Decomposition of Tin Hydride.
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氢化锡的热分解。
DOI：
10.1021/j150539a024
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发表时间：
1956
期刊：
影响因子：
--
通讯作者：
K. Tamaru
中科院分区：
文献类型：
--
作者：
K. Tamaru
用静态方法研究了氢化锡的分解动力学。对于氢化锡的分解是一级反应，与氢的压力无关，反应的活化能在100 ~ 35之间为9.1 kcal /mol。在60℃的锡膜上，氢-氘交换反应没有以可测量的速率进行，在60℃下，锡氢化分解相当快。同样，当氘化锡在氢气存在下分解时，在反应产物中也检测不到氘化氢。相反，当氢化锡和氘化锡的混合物一起分解时，则产生氘化氢。研究了氧对分解的影响。人们发现，少量的氧气可以阻止分解，在锡表面形成氧化膜。简要讨论了全反应的速率决定步骤。如前所述，1-4砷表面上砷的分解对于砷是一级反应，锗表面上锗的分解是零级反应，而锑表面上锑的分解是分数级反应，介于一阶和零级之间。在所有这些情况下，氢都不影响反应速率。认为砷分解的速率决定步骤是砷的化学吸附，而锗分解的速率决定步骤是锗表面化学吸附氢的解吸。后一种情况表明，锗
The kinetics of decomposition of tin hydride have been studied by a static method. The decomposition is a first-order reaction in respect to tin hydride, being independent of hydrogen pressure, and the activation energy of the reaction is 9.1 kcal./mole between 100 and 35. Thehydrogen-deuterium exchange reactiondid not proceed at a measurable rate on tin film at60, where tin hydride decomposed fairly fast. Similarly, when tin deuteride was decomposed in the presence of hydrogen, no hydrogen deuteride coula be detected in the reaction product. On the contrary, when mixtures of tin hydride and tin deuteride were decomposed together, hydrogen deuteride was produced. The effect of oxygen on the decomposition was studied. It was found tnat a small amount of oxygen can stop the decomposition, forming an oxide film on the tin surface. The rate-determining step of the over-all reaction has been discussed briefly.As has been shown in previous papers, 1-4 the decomposition of arsine on arsenic surface is a first-order reaction in respect to arsine and the germane decomposition on germanium surface is zero order, while stibine decomposes on antimony surface as a fractional order, between first and zero order. In all these cases hydrogen does not affect the reaction rate. It was suggested that the rate-determining step of the arsine decomposition is the chemisorption of arsine, while that of germane decomposition is the desorption of chemisorbed hydrogen from the germanium surface. In the latter case it was shown6 that the germanium