Dinuclear Diphosphine-Bridged Complexes of Rhodium, Iridium, and Ruthenium: Synthesis and Structure

Coordination Studies of a New Nonsymmetric Ditertiary Phosphane Bearing a Single Phosphaadamantane Cage

“…Our work has shown that, not only can the phosphadamantane cage impart good solubility and crystallisation properties on its resulting compounds but furthermore, the steric size of the cage can be utilised in controlling the ligating modes of this ligand. Our work should be contrasted, for example, with that of Keim and co-workers [33] who showed that Ru II , Rh III and Ir III complexes of dppe readily bridge two metal fragments affording symmetric dinuclear compounds. The use of bidentate and polyphosphane ligands in the construction of heterometallic species remains an interesting area of coordination chemistry.…”

“…In this manner it may be anticipated that κ 1 -P-monodentate coordination could be favoured leaving a pendant phosphorus group available for further complexation. [33] and [κ 1 -P-IrCl 2 (η 5 -Cp*)(Ph 2 PCH 2 -NHC 6 H 4 PPh 2 )] [δ(P) 0.10 ppm]. [34] The rhodium(III) and iridium(III) complexes are solvent dependant and undergo smooth isomerism to cationic κ 2 -P,PЈ-chelate complexes in solution.…”

Group 9 half-sandwich complexes containing the unique P,P′-diphenyl-1,4-diphospha-cyclohexane ligand: Synthesis, X-ray structure analyses and spectroscopic studies

“…Their research indicated cationic Group 10 metal centers preferred chelation by the dpdpc ligand, where neutral metal centers preferred binucleation through a bridging dpdpc ligand. The unique and varying coordination modes of the dpdpc ligand has lead us to focus our attention on extending the metal coordination of the dpdpc ligand to Group 9 metal centers [14,15].…”

Syntheses and crystal structures of binuclear ruthenium complexes bearing 1,8′-bis(diphenylphosphinomethyl)naphthalene

“…This polymer is very easy to react with other ligands to form mononuclear or binuclear complexes. Because these complexes are generally excellent hydrogenation catalysts for unsaturated organic compounds [2][3][4][5][6][7][8][9], the reactions of [RuCl 2 (g 6 -C 6 H 6 )] x with a variety of monodentate nucleophiles and bidentate phosphine have been an active research area [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. Treatment of [RuCl 2 (g 6 -C 6 H 6 )] x with monodentate nucleophiles (tertiary phosphine, pyridine, tertiary arsine, etc.)…”

“…would generally give (g 6 -C 6 H 6 )RuCl 2 L and [(g 6 -C 6 H 6 )RuClL 2 ]Cl as products (Scheme 1) [13][14][15]. However, the reaction of [RuCl 2 (g 6 -C 6 H 6 )] x with bidentate phosphines are much more complicated [13,15,[18][19][20]. In general, when the backbone of bidentate phosphine is flexible, such as Ph 2 P(CH 2 ) n PPh 2 , the main product would be mononuclear species [(g 6 -C 6 H 6 )Ru(P-P)Cl] + B or phosphine-bridged binuclear complex [(g 6 -C 6 H 6 )Ru(l-P-P)-Ru(g 6 -C 6 H 6 )] D at lower reaction temperature (Scheme 2).…”