Dicarbonylruthenium(II) complexes of diphosphine ligands and their catalytic activity

Palladium complexes of P,P and P,S type bidentate ligands: Implication in Suzuki–Miyaura cross-coupling reaction

“…Elemental analyses and mass spectrometric results of the complexes support the observed molecular composition of 20.52 (1d), ppm respectively. The bands for the P and P]S atoms in 1ae1d show a significant downfield shift relative to those of the corresponding free ligands aed, [30,31] which is in good agreement with the chelate formation in the complexes. The 1 H and 13 C NMR spectra do not provide any significant evidences about the formation of 1ae1d, however, the data are found in the expected ranges.…”

Neutral and cationic ruthenium carbonyl complexes [Ru(CO)(2,2′-dipyridylamine)(PR3)Cl2] and [Ru(CO)(N–N)(PPh3)2(H)]Cl: synthesis, structural characterization and transfer-hydrogenation

“…The bond lengths RuCl1 = 2.4066(8), Ru-Cl2 = 2.4181 (7), Ru-C1 = 1.834 (3), C1-O1 = 1.143 (4) and Ru-P = 2.3670 (7) are within the ranges observed in other complexes [24][25][26][27][28][29][30][31][32][33][34]. The bond length Ru-Cl2 = 2.4181 (7) is longer than RuCl1 = 2.4066 (8), this difference is probably due to the hydrogen bond involving Cl2 and CH 3 OH, as can be seen in Fig.…”

Ru(II) xantphos complex as an efficient catalyst in transfer hydrogenation of carbonyl compounds

“…Although the catalytic activity of the complex displays slightly lower efficiency for the hydrogenation of aldehydes, it, however, shows higher activity for hydrogenation of ketones with respect to similar reported catalysts [23].In addition, iso-PrOH/KOH was used as hydrogen source because of the higher solubility of KOH in isoPrOH rather than the cheaper sodium hydroxide.…”

“…Looking for an efficient and easily accessible complex, bis (phosphine) and mixed donor phosphine-amine complexes Ru II (P^N) and Ru II (P^N^N) have showed highly efficient catalysts for the hydrogenation of esters to alcohols (or conversely, the dehydrogenative coupling of alcohols to form esters) [21,22]. More recently, xantphos pincer complexes of the Ru [23] have also been reported to catalyze the transfer hydrogenation of carbonyl bonds with a high efficiency. As part of our ongoing study, we report here the synthesis and characterization of a ruthenium (II) complex of xantphos 1, containing dimethyl sulfoxides and the catalytic activity of 1 was also investigated in transfer hydrogenation reaction of variety of carbonyl compounds.…”