Osmium-allenylidene complexes containing an N-heterocyclic carbene ligand

被引：44

作者：

Castarlenas, Ricardo ^{[1
]}

Esteruelas, Miguel A. ^{[1
]}

Lalrempuia, Ralte ^{[1
]}

Olivan, Montserrat ^{[1
]}

Onate, Enrique ^{[1
]}

机构：

[1] Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, Dept Quim Inorgan, Zaragoza 50009, Spain

来源：

ORGANOMETALLICS | 2008年 / 27卷 / 04期

关键词：

D O I：

10.1021/om7010694

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Complex [(eta(6)-p-cymene)OsCl(IPr)]OTf (1) reacts with 1,1-diphenyl-2-propyn-1-ol to afford the hydroxyvinylidene derivative [(eta(6)-p-cymene)OsCl{=C=CHC(OH)Ph-2}(IPr)]OTf (2), which dehydrates to form [(eta(6)-p-cymene)OsCl(=C= C=CPh2)(IPr)]OTf (3). Treatment in acetonitrile under reflux of the BF4-salt of 3 with AgBF4 leads to the tetrakis(solvento) derivative [Os(=C=C=CPh2)(CH3CN)(4)(IPr)][BF4](2) (4). At 95 degrees C, the addition of (PPr3)-Pr-i to an acetonitrile solution of 4 yields the dicationic mixed (PPr3)-Pr-i-IPr osmium-allenylidene complex [Os(=C=C=CPh2)(CH3CN)(3)(IPr)((PPr3)-Pr-i)][BF4](2) (5), which in 2-propanol and in the presence of NaCl evolves into the five-coordinate hydride-alkenylcarbyne [OsHCl(equivalent to CCH= CPh2)(IPr)((PPr3)-Pr-i)1[BF4] (6). The X-ray structures of 2, 5, and 6 are also reported.

引用

页码：795 / 798

页数：4

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