Acetylacetonato ligand

The resemblance of the coordination polyhedra in 9 and 10 is really amazing. The same is true for two F-trigonal bipyramidal arrangements as a comparison of the ionic compound molecular complex Sn( OC(Ph)CHC(Me)=0)2 (12) 37), which contains two chelating acetylacetonato ligands, reveals. 

To see whether water could be activated and added to Jt-systems other than alkynes, the metal-catalyzed hydrolysis of nitriles was studied [20]. For this purpose novel homodimeric and heterodimeric bis(acetylacetonato)ruthenium(ii) complexes bearing the 6-diphenylphosphino-N-pivaloyl-2-aminopyridine (10a) and 3-diphenylphosphinoisoquinolone (Ila) ligands were prepared. The molecular structures of these precatalyst were studied in solution and also in the solid state and revealed some unusual hydrogen-bonding patterns, in particular for the heterodimeric system in which the acetylacetonato ligand is involved (Scheme 2.7). 

An intermediate in the reaction of bis(hexafluoroacetylacetonato)-palladium with S = C(C6HdOMe-p)2 to give the cyclopalladated complex 12 could be observed at low temperatures. In the intermediate the thioben-zophenone is 771 coordinated to the metal and one acetylacetonato ligand via the central carbon atom. Subsequent loss of the cr-coordinated acetyl-acetonate afforded 12 (Scheme 4).133... 

We previously prepared surface-bonded rhodium phosphine complexes in Al-MCM-41. In a solution of dichloromethane, [Rh(acac)(chiraphos)] and Al-MCM-41 react to a surface bonded [(Os)x-Rh(chiraphos)] complex due to an exchange reaction of the acetylacetonato ligand and surface oxygens of the acidic support12. Here we present a heterogeneous Rhodium diphosphine catalyst and its application in the enantioselective hydrogenation of dimethylitaconate. The results indicate the localisation of the complex inside of the mesoporous channel system. 

The oxidative additions of aUcynes, hydrosilanes and hydrostannanes to M(acac)(coe)P (Hex-c)3, M = Rh, Ir, have been studied by Esteruelas and coworkers . Particularly interesting is the reaction of 92 with dihydrogen (equation 59), affording a rare example of a silyl trihydride derivative, and shows that the acetylacetonato ligand is able to stabilize either the - -3 or the - -5 oxidation states of iridium. 

The reaction of Pd(acac)2 with PBU3 proceeds with addition of the phosphine and change of the coordination mode of one of the two acetylacetonato ligands from the... 

The reactions of acetylacetonato compounds of transition metals, such as Ni, Fe, Mo, Pt and Co, with R Al(OEt)3 cause parhal alkylahon and give the product with both alkyl and acetylacetonato ligands [44 9] (Eq. 5.13). 

Acac the bidentate acetylacetonato ligand formed from a dIketone... 

The reaction of PPh3 with Pt(acac)2 produces a mononuclear complex with a 6, 0-chelating acetylacetonato ligand 435 and a dinuclear complex in which the acac ligand bonds to a Pt center via 7r-allylic coordination and to another as a 6,0-chelating ligand 436 (Equation (109)). ... 

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