Heterogeneous and homogeneous hydrogenation of styrene and stilbene chromium tricarbonyl complexes
作者:A. N. Artemov、E. V. Sazonova、D. S. Lomakin
DOI:10.1007/s11172-007-0008-1
日期:2007.1
stilbene chromiumtricarbonylcomplexes by molecular hydrogen on skeletal nickel and palladium on carbon as catalysts was studied. As compared to styrene and stilbene, their arene chromiumtricarbonyl analogs are hydrogenated considerably more slowly, which is related, most likely, to strong adsorption of the π-complexes on the catalyst surface. For the homogeneous hydrogenation of these complexes using
研究了以骨架镍和钯碳为催化剂的分子氢对苯乙烯和二苯乙烯三羰基铬配合物的多相加氢反应。与苯乙烯和二苯乙烯相比,它们的芳烃三羰基铬类似物的氢化速度要慢得多,这很可能与 π 络合物在催化剂表面的强吸附有关。为了使用 H2PtCl6-SnCl2-LiBr 系统均匀氢化这些配合物,苯乙烯和 η6-苯乙烯三羰基铬被高速还原,而二苯乙烯及其三羰基铬配合物被非常缓慢地氢化。显示了在作为催化剂的氯化钴 (II) 存在下硼氢化钠还原不饱和芳烃三羰基铬配合物的可能性。
Reactivity of arenechromium carbonyl complexes towards isotopic hydrogen exchange with acids
The hydrogenisotopic exchange reaction (HIE) of the ArGr(CO)2L complexes (I, L = CO; II, L = PPh3, and Ar is biphenyl, diphenylmethane, dibenzyl, diphenyloxide and benzophenone, as well as the corresponding binuclear arenes) in CF3COOD has been studied. The rate constants of HIE have been determined. It was shown that in the series of complexes II such ring substituents as Ph, PhCH2, PhCH2CH3, PhO
Neighboring group participation in organometallic chemistry. Internal exchange in (diarylalkane)tricarbonylchromium complexes
作者:Teddy G. Traylor、Martin J. Goldberg
DOI:10.1021/ja00247a022
日期:1987.6
Determination des vitesses d'echange interne et externe des complexes. On montre la participation du groupe voisin dans tous les complexes. Les vitesses d'echange externe ne sont pas exceptionnelles
Determination des vitesses d'echange interne et externe des complexes。关于 montre la参与 du groupe voisin dans tous les complexes。Les vitesses d'echange externe ne sont pas exceptionnelles
Electrophilic substitution in (arene)tricarbonylchromium complexes. Part 1
作者:Joseph L. von Rosenberg、A. Reginald Pinder
DOI:10.1039/p19870000747
日期:——
The Friedel-Craftsacetylation of several (arene)tricarbonylchromium complexes have been investigated. From the results it is concluded that the tricarbonylchromium group deactivates to a small extent towards electrophilic substitution the ring to which it is attached. In the case of tricarbonyl(diphenylmethane)chromium (1; n= 1), however, attack occurred on both rings to about an equal extent; possible