Synthesis and Reactivity of Indenyl Ruthenium(II) Complexes Containing the Labile Ligand 1,5-Cyclooctadiene (COD): Catalytic Activity of [Ru(η<sup>5</sup>-C<sub>9</sub>H<sub>7</sub>)Cl(COD)]
作者:Patricia Alvarez、José Gimeno、Elena Lastra、Santiago García-Granda、Juan Francisco Van der Maelen、Mauro Bassetti
DOI:10.1021/om010205w
日期:2001.8.1
formation of [Ru(η5-C9H7)Cl(COD)] (1) (80% yield) in a one-potsynthesis. Complex 1 is also formed by the reaction of [RuCl2(COD)]n with NaC9H7 in THF followed by treatment of the intermediate complex [Ru(η5-C9H7)(η2-η3-C8H11)] (2) with HCl. Substitution of the labile COD ligand by bulky phosphines PR3 (R = Cy, iPr3) can be achieved at roomtemperature in THF to give 16-electron species [Ru(η5-C9H7)Cl(PR3)]
The synthesis of the new complexes [Ru(Cp*)(L)(MeCN)2][PF6] (L = Ph2POMe or Ph2P-o-tolyl) and Ru(Cp*)[Ph2PCH2C(tBu)=O](MeCN)}[PF6] (2a–c) is achieved starting from [Ru(Cp*)(MeCN)3][PF6]. The acetonitrile ligands in complexes 2a–c are labile, as emphasised by the easy formation of Ru(Cp*)(CO)2[Ph2PCH2C(=O)tBu]}[PF6] (3). The keto-phosphane is used as a tool to convert 3 into Ru(Cp*)(CO)[Ph2PCH2C(tBu)=O]}[PF6]
Synthesis and characterisation of oxo- and phenylimido-rhenium(v) complexes containing bidentate phosphinoenolato ligands
作者:Xavier Couillens、Marie Gressier、Reine Turpin、Michèle Dartiguenave、Yvon Coulais、André L. Beauchamp
DOI:10.1039/b106306p
日期:2002.3.8
monosubstituted complex is the only species isolated with P3∼OH. The major structural difference between the two systems is the small stability gap between the cis- and the trans-(P,P) isomers of the imido complexes. In ethanol, unexpected cis-ethoxo-oxo complexes ReO(OEt)(P∼O)2 are isolated, resulting from stereoselective substitution of the halide in the ‘twisted’ cis-(P,P) octahedral complexes. The reactions
Reactivity of Diphenylphosphino Enolato Ligands in Ruthenium(II) Complexes and Related Processes Involving Easy Cleavage of a Phosphorus−Carbon Bond in Functionalized Phosphine Ligands
phenyl group from phosphorus to the coordinated ruthenium center in complexes (η6-arene)[η2-Ph2PC(R)C(R‘)O]RuCl, 2 [arene = 1,3,5-Me3C6H3 or C6Me6; R = H or Me; R‘ = But], occurs in methanol at reflux. The reaction is favored by the addition of KOAc and affords selectively the stable phosphinito enolato derivatives (η6-arene)[η2-Ph(MeO)PC(R)C(R‘)O]RuPh. In contrast, the reaction of complexes 2 with methanol
苯基的选自磷至络合物中的协同钌中心(η迁移6 -arene)[η 2 -Ph 2 PC(R)C(R')O]的RuCl,2 [芳烃= 1,3,5- Me 3 C 6 H 3或C 6 Me 6;R = H或Me;R'= Bu t ],在甲醇中回流存在。该反应通过加入的KOAc的青睐,并让选择性地将稳定phosphinito enolato衍生物(η 6 -arene)[η 2 -Ph(的MeO)PC(R)C(R')O]茹博士。相反,络合物2的反应用甲醇和K 2 CO 3蜜饯的功能性配体,并让选择性氢化物衍生物(η 6 -arene)[η 2 -Ph 2 PC(R)C(R')O]茹ħ。络合物2中钌-氯键的裂解也是功能性膦基烯醇配体与1-炔烃HC⋮CR偶联过程中的初步步骤''。反应结果在复合物的形成(η 6 -arene)茹[η 3 - CH C(R '' ) C(R)(PPH 2)C(R')O]}(PF
Synthesis and characterization of novel phosphinoketone and phosphinoenolato rhenium(v) nitrido complexes. Crystal structure of ReNCl2{iPr2PCH2C(Ph)O}2
作者:Xavier Couillens、Marie Gressier、Michèle Dartiguenave、Sébastien Fortin、André L. Beauchamp
DOI:10.1039/b201632j
日期:2002.7.19
Refluxing ReNCl2(PPh3)2 with phosphinoketone ligands (P∼CO) of the type R2PCH(R′)C(R″)O (R = phenyl, isopropyl; R′
= H, methyl; R″
= phenyl, tert-butyl) in toluene or ethanol yields selectively the octahedral nitrido-rhenium(V) complexes ReN(PR3)(P∼O)2, where the P atoms of two deprotonated P∼O− ligands occupy cis positions and an oxygen donor lies trans to the ReN bond. The sixth coordination site is filled by a monodentate phosphine, either PPh3 or non-deprotonated P∼CO, depending on the metal-to-ligand ratio. When iPr2PCH2C(Ph)O is refluxed for 1 h (2/1 L/Re ratio), ReNCl2iPr2PCH2C(Ph)O}2 (1) precipitates
as the only species. X-Ray diffraction shows that the Re(V) centre of 1 is six-coordinated with a distorted octahedral geometry, being bonded to the nitrido N atom, two trans chlorides, two trans P atoms and the oxygen of one of the phosphinoketones lying trans to the N3− ligand. The short ReN bond (1.629(4) Å) and the long trans Re–O bond (2.466(5) Å) reflect the large trans influence of the nitrido ligand. The mono- and bi-dentate phosphinoketones in this compound are involved in an intramolecular interchange process.