Synthesis and characterisation of [(η6-cymene)Ru(L)X2] compounds: single crystal X-ray structure of [(η6-cymene)Ru(P{OPh}3)Cl2] at 203 K
摘要:
Treatment of the chloro bridged dimer {[(eta(6)-cymene)RuCl](2)(mu-Cl)(2)} (1) with the donor molecules P(OPh)(3), P(OMe)(3), PPh3, PMe3, CO, SMe2, (CNBu)-Bu-t and CNTos in hot hexane causes bridge splitting reactions that produce the monomeric compounds [(eta(6)-cymene)Ru(L)Cl-2], (4)-(11), respectively. Use of the chiral isonitrile S(-)-alpha-methylbenzylisonitrile produced the corresponding complex 12. The diiodo analogues, 13-15, were prepared similarly from {[(eta(6)-cymene)RuI](2)(mu-I)(2)} (3) for P(OPh)(3), P(OMe)(3) and PPh3, respectively. Insertion of tin(II) chloride into both metal-chlorine bonds was observed for [(eta(6)-cymene)Ru(P{OMe}(3))Cl-2] (5), while only monosubstitution was observed for [(eta(6)-cymene)Ru(PPh3)Cl-2] (6). Halide abstraction in the presence of a substrate reaction has been used to prepare some selected cationic compounds which contain an asymmetric ligand environment. Reaction of {[(eta(6)-cymene)RuCl](2)(mu-Cl)(2)} with 1,2-bis(diphenylphosphino)-ethane under ionising conditions produced the cation [(eta(6)-cymene)Ru(dppe)Cl]PF6 (20). Selected compounds have been examined by {C-13-H-1} heteronuclear correlation and {H-1-H-1} COSY and NOESY experiments. The structure of [(eta(6)-cymene)Ru(P{OPh}(3))Cl-2](CH2Cl2)-C-. (4) has been determined at -70degreesC. (C) 2004 Elsevier Ltd. All rights reserved.
作者:Mohamed Gaye、Bernard Demerseman、Pierre H. Dixneuf
DOI:10.1016/0022-328x(91)86026-m
日期:1991.7
The preparations are reported of neutral and cationic (dialkylsufide)(eta-6-arene)ruthenium(II) complexes of the types (eta-6-arene)Cl2Ru(SR2), [(eta-6-arene)ClRu(SR2)2]+ and [(eta-6-arene)ClRu(SR2)(L)]+. These complexes containing labile R2S-Ru bonds can be used in the ready generation of 16 electron ruthenium moieties for the activation of terminal alkynes and access to cationic (carbene)(eta-6-arene)ruthenium(II) derivatives such as (1,3,5-Me3C6H3)ClRu(SMe2)[C(OMe)CH2Ph]}+ and (C6Me6)ClRu(PMe3)[C(OMe)CH2Ph]}+.
Facile transmetalation of a pyridyl-phosphine ligand from ruthenium to gold and silver
作者:Eder Tomás-Mendivil、Rocío García-Álvarez、Sergio E. García-Garrido、Josefina Díez、Pascale Crochet、Victorio Cadierno
DOI:10.1016/j.jorganchem.2012.12.027
日期:2013.3
Treatment of [RuCl2(n(6)-p-cymene)k(1)-(P)-PPh2(py-6-tert-amyl)}] (1a) and [RuCl2(n(3):n(3)-C10H16)k(1)-(P)-PPh2(py-6-tert-amyl)}] (1b) with [AuCl(SMe2)], in dichloromethane at room temperature, resulted in the formation of the dimethyl sulfide adducts [RuCl2(n(6)-p-cymene)(SMe2)] (3a) and [RuCl2(n(3): n(3-)C(10)H(16))( SMe2)] (3b), and the Au(I) complex [AuClk1-(P)-PPh2(py-6-tert-amyl)}] (4). Transmetalation of the pyridyl-phosphine PPh2(py-6-tert-amyl) (2) was also observed when dichloromethane solutions of 1a-b were treated with AgSbF6 in the presence of SMe2, the reactions leading to 3a-eb and the dinuclear Ag(I) derivative [Ag-2mu-PPh2(py-6-tert-amyl)}(2)][SbF6](2) (5). In the absence of SMe2 transmetalation of the phosphine to silver was not observed. Instead, the unexpected protonation of the pyridyl group by HF, generated by partial hydrolysis of the SbF6- anion, occurred. Compounds [AuClk(1)-(P)-PPh2(py-6-tert-amyl)}] (4) and [Ag-2mu-PPh2(py-6-tert-amyl)}(2)][SbF6](2) (5) were independently synthesized by reacting 2 with [AuCl(SMe2)] and AgSbF6, respectively, and their structures confirmed by means of single-crystal X-ray diffraction techniques, along with those of the protonated species [RuCl2(n(6)-p-cymene)k1-(P)PPh2(pyH-6-tert-amyl)}][SbF6] (6a) and [RuCl2(n(3):n(3)-C10H16)k(1)-(P)-PPh2(pyH-6-tert-amyl)}][SbF6] (6b). (C) 2012 Elsevier B. V. All rights reserved.