Reactions of Ru-alkynyl Complexes with Electrophilic Boranes

被引：14

作者：

Boone, Michael P. ^{[1
]}

Stephan, Douglas W. ^{[1
]}

机构：

[1] Univ Toronto, Toronto, ON, Canada

来源：

ORGANOMETALLICS | 2011年 / 30卷 / 20期

基金：

加拿大自然科学与工程研究理事会;

关键词：

FRUSTRATED LEWIS PAIRS; CYCLOPENTADIENYL-OSMIUM CHEMISTRY; METAL VINYLIDENES; ORGANOMETALLIC CHEMISTRY; ADDITION-REACTIONS; TERMINAL ALKYNES; RUTHENIUM; ACID; 1,1-CARBOBORATION; ZIRCONOCENES;

D O I：

10.1021/om200815s

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The species CpRu(PPh3)(2)(C CPh) (1) reacts with HB(C6F5)(2) to effect the hydroboration of the metal-bound alkyne, giving the orange species CpRu(PPh3)(2)CH=C(Ph)(B(C6F5)(2)) (2) in 95% isolated yield. Subsequent photolysis of this species results in the rearrangement of the vinyl group to give the species CpRu(PPh3)[PhC C(B(H)(C6F5)(2))] (3) in 87% yield. The species exhibits a side-on alkyne donation to Ru as well as a bridging BH fragment. Intermediates in this conversion are discussed in relation to known species, and support for a transient zwitterionic intermediate is offered by the isolation of 1 CpRu(PPh3)(2)(C=CPh(C6F4)BF(C6F5)(2)) (4) from the reaction of CpRu-(PPh3)(2)(C CPh) with B(C6F5)(3). The compounds 2-4 are crystallographically characterized.

引用

页码：5537 / 5542

页数：6

共 72 条

[1] Dynamic features of the zirconocene-boron-betaine complexes obtained by treatment of bis(alkynyl) zirconocenes with the tris(pentafluorophenyl) borane Lewis-acid [J].