84779-40-8Relevant articles and documents
Synthesis and unexpected reactivity of [Ru(η 6-cymene)Cl2(PPh2Cl)], leading to [Ru(η 6-cymene)Cl2(PPh2H)] and [Ru(η 6-cymene)Cl 2 (PPh2OH)] complexes
Pandiakumar, Arun Kumar,Samuelson, Ashoka G
, p. 1329 - 1338 (2015)
The reaction of [Ru(η 6-cymene)Cl2]2 and PPh2Cl in the ratio 1:2 gives a stable [Ru(η 6-cymene) Cl2(PPh2Cl)] complex. Attempts to make the cationic [Ru(η 6-cymene)Cl(PPh2Cl)2]Cl with excess PPh2Cl and higher temperatures led to adventitious hydrolysis and formation of [Ru(η 6-cymene)Cl2(PPh2OH)]. Attempts to make a phosphinite complex by reacting [Ru(η 6-cymene)Cl2]2 with PPh2Cl in the presence of an alcohol results in the reduction of PPh2Cl to give [Ru(η 6-cymene)Cl2(PPh2H)] and the expected phosphinite. The yield of the hydride complex is highest when the alcohol is 1-phenyl-ethane-1,2-diol. All three half-sandwich complexes are characterized by X-ray crystallography. Surprisingly, the conversion of chlorodiphenylphosphine to diphenylphosphine is mediated by 1-phenyl-ethane-1,2-diol even in the absence of the ruthenium half-sandwich precursor. [Figure not available: see fulltext.]
Mild intramolecular P–C(sp3) bond cleavage in bridging diphosphine complexes of RuII RhIII and IrIII
De'Ath, Peter,Elsegood, Mark R.J.,Halliwell, Christopher A.G.,Smith, Martin B.
, (2021/02/21)
Three new carboxylic acid functionalised diphosphines, R2PCH2N(Ar)CH2PR2 [CyL1 R = Cy, Ar = (1-CO2H)(3-OMe)C6H3, CyL2 R = Cy, Ar = (1-CO2H)(3-OH)C6H3 and PhL3 R = Ph, Ar = (1-CO2H)(5-OMe)C6H3] have been prepared from condensation of R2PCH2OH and the appropriate aromatic amine in MeOH, and isolated as colourless solids (for CyL1, CyL2) in good yield. Reaction of CyL1, CyL2, or PhL3, along with the previously reported diphosphines PhL1, PhL2, and PhL4, and [RuCl(μ-Cl)(η6-Me2CHC6H4Me)]2 in CH2Cl2 affords the P/P-bridging dinuclear ruthenium(II) complexes {RuCl2(η6-Me2CHC6H4Me)}2(μ-CyL1?PhL4) 1a?f as red/orange solids. Careful monitoring by 31P{1H} NMR spectroscopy of CDCl3 solutions of 1a?e revealed remarkably clean P?Csp3 bond cleavage to give RuII mononuclear species 2a?e and the known secondary phosphine complexes RuCl2(η6-Me2CHC6H4Me)(PCy2H) 3 and RuCl2(η6-Me2CHC6H4Me)(PPh2H) 4. Furthermore, facile P?Csp3 bond cleavage of PhL1 can be observed using the chloro-bridged dimers [IrCl(μ-Cl)(η5-C5Me5)]2 or [RhCl(μ-Cl)(η5-C5Me5)]2 instead. Deuterium labelling of CyL1, CyL1, PhL1, and PhL2 enabled the assignment of the methylene protons to be confirmed from 1H NMR spectroscopy. All new compounds have been characterised using a range of spectroscopic and analytical techniques. Single crystal X-ray structures have been determined for CyL1, 1d·3OEt2, 1f·2CDCl3·OEt2, 2b, 2c, 2d·CDCl3, 2e·0.5OEt2 and 6b·1.5CDCl3. The free phenolic group in CyL1, 1d·3OEt2, 1f·2CDCl3·OEt2, 2b and 2d·CDCl3 participates in intra- or intermolecular O?H···O hydrogen bonding.
Heteronuclear and heterovalent diphenylphosphido-bridged complexes of rhodium, iridium and ruthenium. Crystal structure of *1/2Et2O (COD = 1,5-cyclooctadiene)
Esteban, Montserrat,Pequerul, Alberto,Carmona, Daniel,Lahoz, Fernando J.,Martin, Alberto,Oro, Luis A.
, p. 421 - 434 (2007/10/02)
Mononucelar complexes of formulae , BF4 and BF4 (M = Rh, Ir; L = C5Me5.M = Ru; L = p-Cymene; R = Ph, H; R' = H; Hacac = acetylacetone, but not in all possible combinations) have been prepared from the corresponding 2(μ-Cl)2> or and HPRR'.Complexes react with 2 (M' = Rh; diolefin = tetrafluorobenzobarrelene (TFB), 1,5-cyclooctadiene (COD).M' = Ir; diolefin = COD) to yield diphenylphoshido-bridged complexes of formula .The structure of *1/2Et2O has been determined by X-ray diffraction methods.The complex consists of two moieties, (C5Me5)RhCl and Rh(COD), doubly-bridged by a diphenylphosphido group and a chlorine atom.The two rhodium atoms are separated by 3.3657(6) Angstroem.
