Spectroscopic investigations of bis(sulfoximine) copper(II) complexes and their relevance in asymmetric catalysis

被引：57

作者：

Bolm, C

Martin, M

Gescheidt, G

Palivan, C

Neshchadin, D

Bertagnolli, H

Feth, M

Schweiger, A

Mitrikas, G

Harmer, J

机构：

[1] Rhein Westfal TH Aachen, Inst Organ Chem, D-52056 Aachen, Germany

[2] Univ Basel, Inst Phys Chem, CH-4056 Basel, Switzerland

[3] Univ Stuttgart, Inst Phys Chem, D-70569 Stuttgart, Germany

[4] ETH Honggerberg, Chem Phys Lab, CH-8093 Zurich, Switzerland

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2003年 / 125卷 / 20期

关键词：

D O I：

10.1021/ja027870w

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The structure of Cu(II) complex 3 formed within the course of a stereoselective Diels-Alder reaction was investigated by EXAFS, CW-EPR at X- and W-band, HYSCORE, pulsed ENDOR, and UV-vis spectroscopy. The experimental techniques indicate that the chiral bis(sulfoximine) ligand (S,S)-1 and the dienophile form a tetragonally distorted complex in CH2Cl2. The ligand binds to the Cu(l I) center via the imine nitrogens, whereas the dienophile interacts via the carbonyl oxygen atoms. The additional sites of the first coordination sphere are occupied by counterions and, presumably, solvent molecules. At the axial position, a triflate anion binds via an oxygen atom.

引用

页码：6222 / 6227

页数：6

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