Interligand Interactions Dictate the Regioselectivity of<i>trans</i>-Hydrometalations and Related Reactions Catalyzed by [Cp*RuCl]. Hydrogen Bonding to a Chloride Ligand as a Steering Principle in Catalysis
作者:Stephan M. Rummelt、Karin Radkowski、Dragoş-Adrian Roşca、Alois Fürstner
DOI:10.1021/jacs.5b01475
日期:2015.4.29
mode in the presence of [Cp*Ru(MeCN)3]PF6 (1) as the catalyst; however, the regioselectivity is often poor with unsymmetrical substrates. This problem can be solved upon switching to a catalyst comprising a [Ru-Cl] bond, provided that the acetylene derivative carries a protic functional group. The R3M unit is then delivered with high selectivity to the alkyne-C atom proximal to this steering substituent
Coordinatively Unsaturated Ruthenium Phosphine Half-Sandwich Complexes: Correlations to Structure and Reactivity
作者:Halikhedkar Aneetha、Manuel Jiménez-Tenorio、M. Carmen Puerta、Pedro Valerga、Valentin N. Sapunov、Roland Schmid、Karl Kirchner、Kurt Mereiter
DOI:10.1021/om020359r
日期:2002.11.1
HCl to form 18e derivatives has been studied. Some model systems have been analyzed using density functional theory (DFT) calculations. Also included are comparative studies on the NN counterparts. The moieties [CpRu(PP)]+ (PP = (PH3)2, H2PCH2CH2PH2) adopt typically pyramidal structures (i.e. in the absence of bulky and rigid substituents on P) versus planar structures of [CpRu(NN)]+ (NN = (NH3)2, H2NCH2CH2NH2)
Ruthenium-Catalyzed Alkyne<i>trans</i>-Hydrometalation: Mechanistic Insights and Preparative Implications
作者:Dragoş-Adrian Roşca、Karin Radkowski、Larry M. Wolf、Minal Wagh、Richard Goddard、Walter Thiel、Alois Fürstner
DOI:10.1021/jacs.6b12517
日期:2017.2.15
[Cp*RuCl]4 (1) has previously been shown to be the precatalyst of choice for stereochemically unorthodox trans-hydrometalations of internal alkynes. Experimental and computational data now prove that the alkyne primarily acts as a four-electron donor ligand to the catalytically active metal fragment [Cp*RuCl] but switches to adopt a two-electron donor character once the reagent R3MH (M = Si, Ge, Sn)
Ruthenium(<scp>IV</scp>) silyl hydride complexes via reaction of silanes with 16-electron [Ru(η<sup>5</sup>-C<sub>5</sub>Me<sub>5</sub>)(PPr<sup>i</sup><sub>3</sub>)X](X = Cl, CH<sub>2</sub>SiHPh<sub>2</sub>, SiMePh<sub>2</sub>) complexes. Hydride migrations to an η<sup>2</sup>-silene ligand
作者:Brian K. Campion、Richard H. Heyn、T. D. Tilley
DOI:10.1039/c39920001201
日期:——
Reactions of [Ru(η5-C5Me5)(PPri3)(H)(η2-CH2SiPh2)] with hydrosilanes occur via initial migration of hydride to the silene ligand, and eventually give disilyl hydride or silyl dihydride ruthenium(IV) complexes; the 16-electron chloride[Ru(η5-C5Me5)(PPri3)Cl] adds mesityl (Mes) silane to give [Ru(η5-C5Me5)(PPri3)(H)2(SiHcMes)] which was crystallographically characterized.
Synthesis and reactivity of cationic ruthenium germylene complexes [Cp*(PiPr3)RuH2(GeRR′)]+
作者:Meg E. Fasulo、T. Don Tilley
DOI:10.1039/c2cc32840b
日期:——
Two synthetic routes to cationic ruthenium germylene complexes are described. A hydrogen-substituted germylene complex undergoes various additions of the Ge-H bond to alkene and alkyne substrates.