Coordination Chemistry and Catalytic Application of Bidentate Phosphaferrocene−Pyrazole and −Imidazole Based P,N-Ligands
datasetposted on 25.05.2009, 00:00 by Holger Willms, Walter Frank, Christian Ganter
Datasets usually provide raw data for analysis. This raw data often comes in spreadsheet form, but can be any collection of data, on which analysis can be performed.
The synthesis of new planar chiral P,N-ligands based on 3,4-dimethylphosphaferrocene and either pyrazole or 1-methylimidazole is described. The coordination chemistry of the hemilabile pyrazole derivatives 3a and 3b (a features a methylene bridge between the heterocycles, b an ethylene bridge) was investigated and afforded complexes [Mo(3)(CO)5], cis-[Mo(3)2(CO)4], [Cp*RuCl(3)], [Cp*Ru(3)2]OTf, [Cp*RuCl(3)(PPh3)], and [Pd(η3-allyl)(3)]PF6. Reaction of the imidazole derivatives 4a and 4b with [Pd(η3-allyl)Cl]2 and TlPF6 yielded [Pd(η3-allyl)(4)]PF6. The Pd complexes of 3 and 4 were tested in the catalytic asymmetric allylic alkylation reaction of 1,3-diphenylallyl acetate with sodium dimethylmalonate. X-ray structures of one Ru complex and one Pd complex of 3a were determined.