Mechanism of the carbon-carbon cleavage of acetone by the ruthenium benzyne complex (PMe3)4Ru(.eta.2-C6H4): formation and reactivity of an oxametallacyclobutane complex
作者:John F. Hartwig、Robert G. Bergman、Richard A. Andersen
DOI:10.1021/ja00164a067
日期:1990.4
Generation et caracterisation d'un intermediaire potentiel de la reaction, le complexe (methyl-4 phenyl-4)oxa-1 ruthena-2 cyclobutane
Generation et caracterisation d'un intermediaire potentiel de la reaction, le complexe (methyl-4 phenyl-4)oxa-1 ruthena-2 cyclobutane
Reactions of CO<sub>2</sub> and CS<sub>2</sub> with [RuH(η<sup>2</sup>-CH<sub>2</sub>PMe<sub>2</sub>)(PMe<sub>3</sub>)<sub>3</sub>]
作者:Leslie D. Field、Peter M. Jurd、Alison M. Magill、Mohan M. Bhadbhade
DOI:10.1021/om3011307
日期:2013.1.28
3)3] (4), where the CS2 inserts into the metal hydride bond. On warming, complex 4 rearranges to give the known complex [Ru(S2CHPMe2CH2-κ3S,S,C)(PMe3)3] (3), where the CS2 is inserted in a metal phosphorus bond. Further reaction of this complex with excess CS2 over a period of days resulted in insertion of a second CS2 unit into one Ru–S bond to yield [Ru(SC(═S)SCH(-S)PMe2CH2-κ3S,S,C)(PMe3)3] (5).
Reactions of small boranes with ruthenium phosphine hydrides: Oligomerisation of monoborane-tetrahydrofuran to a nido-hexaruthenaborane
作者:Malcolm L.H. Green、John B. Leach、Malcolm A. Kelland
DOI:10.1016/j.jorganchem.2006.01.027
日期:2006.4
Reaction of [Ru(PPh3)4H2] with BH3 · thf at room temperature gives borane oligomerisation with the formation of the 6-vertex metallaborane nido-2-[Ru(PPh3)2(H)B5H10] (1). This cluster is also formed by reaction of [Ru(PPh3)4H2] with nido-B5H9. Compound (1) is readily deprotonated by KH in thf at the unique basal B–H–B bridge to give nido-2-[Ru(PPh3)2(H)B5H9-][K+] (2). In contrast to [Ru(PPh3)4H2] reaction
[Ru(PPh 3)4 H 2 ]与BH 3 ·thf在室温下反应可生成硼烷低聚反应,并形成6-顶点金属硼烷正氨基-2- [Ru(PPh 3)2(H)B 5 H 10 ](1)。该簇也通过[Ru(PPh 3)4 H 2 ]与Nido- B 5 H 9反应形成。化合物(1)很容易在唯一的基础B–H–B桥上被KH质子化,得到nido-2- [Ru(PPh3)2(H)B5H9-] [K +] (2)。与此相反的[Ru(PPH 3)4 ħ 2 ]的反应[顺-Ru(PME 3)4 ħ 2 ]用BH 3 ·THF最初给出了硼氢化已知的[Ru(PME 3)3(H)(η 2 -BH 4)],其与过量的BH 3 ·thf反应,得到5顶点金属金属硼烷nido -2- [Ru(PMe 3)3 B 4 H 8 ](3)。[顺式-Ru(PMe 3)4 H的反应具有nido -B 5 H 9的2 ]也给出了(3)和nido
Synthesis, Structural Diversity, Dynamics, and Acidity of the M(II) and M(IV) Complexes [MH<sub>3</sub>(PR<sub>3</sub>)<sub>4</sub>]<sup>+</sup> (M = Fe, Ru, Os; R = Me, Et)
作者:Dmitry G. Gusev、Rainer Hübener、Peter Burger、Olli Orama、Heinz Berke
DOI:10.1021/ja963692t
日期:1997.4.1
The syntheses of complexes MH2L4 and their protonated analogues [MH3L4]+ (M = Fe (1), Ru (2), Os (3); R = Me (a), Et (b)) are described. The structures of 1a, 1b, and 3a were determined in X-ray diffraction studies. The solutionstructures of complexes 1−3 were established by detailed NMR investigations. 1a, 2b, and 3a form equilibrium mixtures of two isomers in solution. The iron (1a) and ruthenium
描述了复合物 MH2L4 及其质子化类似物 [MH3L4]+ (M = Fe (1), Ru (2), Os (3); R = Me (a), Et (b)) 的合成。在 X 射线衍射研究中确定了 1a、1b 和 3a 的结构。通过详细的核磁共振研究确定了配合物 1-3 的溶液结构。1a、2b 和 3a 在溶液中形成两种异构体的平衡混合物。铁 (1a) 和钌 (2b) 络合物在六配位 M(II) 二氢顺式 [MH(H2)L4]+ 和七配位 M(IV) 三氢化物 [M(H)3L4]+ 分子几何结构之间异构化:第一个是扭曲的八面体,第二个可以看作是氢化物封端的 M(PR3)4 四面体。配合物 3a 是五边形双锥三氢化物顺式-[Os(H)3(PMe3)4]+,与氢化物封端的四面体结构形式处于平衡状态。三氢化物1b和3b仅由后一种结构类型代表。阳离子分子2a对应于二氢络合物顺式-[RuH(H2)(PMe3)4]+。因此,金属碎片
Catalytic Behavior of Cationic Hydridoruthenium(II) Complex, [RuH(NH<sub>3</sub>)(PMe<sub>3</sub>)<sub>4</sub>]<sup>+</sup>, in H<sub>2</sub>-Hydrogenation and Transfer Hydrogenation of Imines
Catalytic hydrogenation under H2 and transfer hydrogenation of imines by secondary alcohols with hydridoruthenium complexes bearing PMe3 and PPh3 ligands have been examined. A cationic hydridoruthenium complex, cis-[RuH(NH3)(PMe3)4]PF6 (2), derived from cis-[RuH2(PMe3)4] (1) and NH4PF6, showed higher catalytic activity for H2-hydrogenation of N-benzylideneaniline than neutral complexes such as 1 and cis-[RuClH(PMe3)4] (6). The effectiveness of cationic hydridoruthenium species for the catalytic H2-hydrogenation of benzylideneaniline was also demonstrated by a marked increase in the yield of N-benzylaniline on treatment of 6 with AgPF6. The cationic complex 2 was applicable to catalytic transfer hydrogenation of imines with secondary alcohols even in the absence of a base. Isotope labeling experiments using deuterated alcohols revealed that the hydrogen atom bound to the α-carbon of the donor alcohol was transferred exclusively to the imine carbon and alcoholic OD was transferred to the imine nitrogen. A rapid exchange between the alcoholic proton and the hydrido ligand of 2 was also confirmed by NMR investigation using (CH3)2CHOD. On the basis of the experimental results the mechanisms of the H2-hydrogenation and transfer hydrogenation are discussed.