Axial Interaction of the [Ru<sub>2</sub>(CO)<sub>4</sub>]<sup>2+</sup> Core with the Aryl C−H Bond: Route to Cyclometalated Compounds Involving a Metal−Metal-Bonded Diruthenium Unit
作者:Sanjib K. Patra、Jitendra K. Bera
DOI:10.1021/om060774+
日期:2006.12.1
Room-temperature activation of the aromatic C−H bond by the [Ru2(CO)4]2+ core has been achieved. The reactions of 2-phenyl-1,8-naphthyridine (phNP) and 2-(2,5-dimethyl-3-furyl)-1,8-naphthyridine (Me2fuNP) with [Ru2(CO)4(MeCN)6][BF4]2 in dichloromethane provide the agostic-cyclometalated compounds [Ru2(phNP)(C6H4-NP)(CO)4][BF4] (1) and [Ru2(Me2fuNP)(C4OMe2-NP)(CO)4][BF4] (2), respectively. In both compounds, one
[Ru 2(CO)4 ] 2+核可实现室温活化芳族CH键。2-苯基-1,8-萘啶(phNP)和2-(2,5-二甲基-3-呋喃基)-1,8-萘啶(Me 2 fuNP)与[Ru 2(CO)4(MeCN) )6 ] [BF 4 ] 2在二氯甲烷中提供[Ru 2(phNP)(C 6 H 4 -NP)(CO)4 ] [BF 4 ](1)和[Ru 2(Me 2 fuNP) )(C 4 OMe 2-NP)(CO)4 ] [BF 4 ](2)。在这两种化合物中,一个配体是邻位金属化的,而第二个配体则参与了有害的相互作用。相对于2-(2-噻吩基)-1,8-萘啶(thNP)的潜在S配位,优选邻位金属化,生成[Ru 2(thNP)(C 4 H 2 S-NP)(CO)4 ] [ BF 4 ](3)。在乙腈中,化合物[Ru 2(thNP)2(CO)4 ] [BF 4 ] 2(4)是独家获得的。将C H键合电子对对Ru-Ruσ*