Preparation, reactivity, and structural peculiarities of hydroxyalkyl-functionalized "second-generation" ruthenium carbene complexes

被引：132

作者：

Prühs, S ^{[1
]}

Lehmann, CW ^{[1
]}

Fürstner, A ^{[1
]}

机构：

[1] Max Planck Inst Kohlenforsch, D-45470 Mulheim, Germany

来源：

ORGANOMETALLICS | 2004年 / 23卷 / 02期

关键词：

D O I：

10.1021/om0342006

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The preparation, immobilization, and structure of "second-generation" ruthenium benzylidene metathesis catalysts bearing hydroxyalkyl chains on their N-heterocyclic carbene ligands are described. Complexes of this type are prone to rearrange their ligand sphere such that the neutral ligands get cis- rather than trans-disposed. Moreover, treatment of complex 7d with pyridine results in an unprecedented ionization by loss of one of its chloride ligands. The resulting cationic species 13, though devoid of catalytic activity, is the first member of a new type of ruthenium carbene complexes characterized by an octahedral coordination geometry and a donor/acceptor interaction between the metal center and the tethered hydroxyl group. The trans-configured hydroxyalkyl-functionalized complexes 8a and 8b, the cis-configured compound 10, and the ion pair 13 have been structurally characterized by X-ray crystallography.

引用

页码：280 / 287

页数：8

共 93 条

[1] Ruthenium carbene complexes with imidazolin-2-ylidene ligands allow the formation of tetrasubstituted cycloalkenes by RCM [J].