Refined Insight in Stereochemical and Directional Features of the FeI-Mediated Dehydrogenation of Tetralin
作者:Katrin Seemeyer、Helmut Schwarz
DOI:10.1002/hlca.19930760624
日期:1993.9.22
Experimental results demonstrate that, in the course of gas-phase Fe+-mediated dehydrogenation of tetralin, the metal ion sticks to the same plane of the hydrocarbon surface. The study of 5-substituted, labeled tetralin analogues reveal the operation of an interesting substituent effect: Steric hindrance imposed by a CH3 group at C(5) deflects the metal to the more easily accessible region of C(1)/C(2);
实验结果表明,在气相Fe +介导的四氢化萘脱氢过程中,金属离子粘附在烃表面的同一平面上。5-取代的标记四氢萘类似物的研究揭示了一种有趣的取代基作用:CH 3基团在C(5)处施加的立体位阻将金属偏转到C(1)/ C(2)的更易于访问的区域); 相比之下,C(5)处的CH 3 O取代基将金属离子引导至更拥挤的C(3)/ C(4)区域,该区域清楚地表明触觉过程中Fe +与MeO基团的配位移民。