O. Prakash, Hemant Joshi, K. Sharma
Jul 11, 2014
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0
Influential Citations
40
Citations
Journal
Organometallics
Abstract
The reactions of 2-(pyridine-2-ylmethylsulfanyl)benzoic acid (L) with [(η5-Cp*/η6-benzene)MCl(μ-Cl)]2, (benzene, M = Ru; Cp*, M = Rh, Ir) at room temperature followed by treatment with NH4PF6 result in a new class of water-soluble half-sandwich complexes [(η5Cp*/η6-benzene)M(L)Cl][PF6] (1–3, respectively, for M = Ru, Rh, Ir). Their characteristic HR-MS and 1H and 13C{1H} NMR spectra have been found. The single-crystal structures of 1–3 have been established with X-ray crystallography. The Ru–S, Rh–S, and Ir–S bond lengths are 2.4079(6), 2.3989(10), and 2.3637(14) A, respectively. Complexes 1–3 have been found to be efficient for catalytic transfer hydrogenation (TH) of carbonyl compounds in water with glycerol as a hydrogen donor. Glycerol has been explored for TH in water for the first time. The efficiency in water of other hydrogen sources, viz. HCOOH, citric acid, ascorbic acid, and 2-propanol, is less and/or is pH dependent. Catalysis with glycerol as a hydrogen source is pH independent and appears to...