Re2(CO)8(μ-SbPh2)(μ-H) 经钯催化二聚反应生成的四元杂环展现出一种不寻常的主客体行为。

Tetrarhena-heterocycle from the palladium-catalyzed dimerization of Re2(CO)8(μ-SbPh2)(μ-H) exhibits an unusual host-guest behavior.

机构信息

Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA.

出版信息

J Am Chem Soc. 2011 Aug 24;133(33):12994-7. doi: 10.1021/ja205515u. Epub 2011 Aug 1.

DOI:10.1021/ja205515u

Abstract

The six-membered heavy atom heterocycles Re(2)(CO)(8)(μ-SbPh(2))(μ-H), 5, and PdRe(2)(CO)(8)(μ-SbPh(2))(μ-H), 7, have been prepared by the palladium-catalyzed ring-opening cyclo-dimerization of the three-membered heterocycle Re(2)(CO)(8)(μ-SbPh(2))(μ-H), 3. The palladium atom that lies in the center of the heterocycle 7 was removed to yield 5. The palladium removal was found to be partially reversible leading to an unusual example of host-guest behavior. A related dipalladium complex Pd(2)Re(4)(CO)(16)(μ(4)-SbPh)(μ(3)-SbPh(2))(μ-Ph)(μ-H)(2), 6, was also formed in these reactions of palladium with 3.

摘要

六元重原子杂环 Re(2)(CO)(8)(μ-SbPh(2))(μ-H)、5 和 PdRe(2)(CO)(8)(μ-SbPh(2))(μ-H)、7，是通过钯催化的三元杂环 Re(2)(CO)(8)(μ-SbPh(2))(μ-H)、3 的开环环二聚反应制备的。位于杂环 7 中心的钯原子被移除，生成了 5。钯原子的移除被发现是部分可逆的，导致了一种不寻常的主客体行为的例子。在钯与 3 的反应中，还形成了一个相关的双钯配合物 Pd(2)Re(4)(CO)(16)(μ(4)-SbPh)(μ(3)-SbPh(2))(μ-Ph)(μ-H)(2)、6。