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Title: Ruthenium complexes containing bridging dppm and benzene-1, 2-dithiolato ligands: X-ray crystal structure of [Ru2(CO)4 {μ-S(C6H4)S} (μ-dppm)]
Authors: Begum, Noorjahan
Hyder, Md Iqbal
Kabir, Shariff E
Kundu, Kalipada
Issue Date: Mar-2005
Publisher: NISCAIR-CSIR, India
IPC Code: C07F15/00; G01N23/00
Abstract: The reaction of benzene-1,2-dithiol with [Ru3(CO)10(μ-dppm)] 1 in refluxing THF afforded two new compounds [Ru2(CO)4 {μ-S(C6H4)S}(μ-dppm)] 2 and [Ru3(CO8{μ-S(C6H4)S}(μ-dppm)] 3 which were characterized by elemental analysis, infrared, 1H and 31P{1H} NMR and mass spectra. The structure of 2 was determined by single crystal X-ray diffraction analysis. The compound crystallizes in the monoclinic space group P21/n, with a= 1 0.3133(2), b= 16.9806(3), c= 19.5605(3) Å, α=90, β=100.2298(11), γ=90°, V=3371.10(10) Å3 and Z=4. Both Ru atoms are in distorted octahedral geometry. For each ruthenium, two CO groups in cis positions, one bridged S atom and the other bonded Ru atom occupy the equatorial sites, and the other bridged S atom and a P atom of the bridging dppm ligand are in trans positions on the meridional axis. Of the two S atoms, one lies in the Ru2P2 plane while the other is perpendicular to this plane, thus making them nonequivalent but keeping the two P atoms of the bridging dppm ligand identical. The 50-electron compound 3 contains a doubly briddging dithiolato and a bridging dppm ligand. Protonation of 2 with trifluroacetic acid results in the formation of the cationic hydrido species [(μ-H)Ru2(CO)4 {μ-S(C6H4)S} (μ-dppm)]+ which has been characterized by spectroscopic data.
Page(s): 521-525
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections: IJC-A Vol.44A(03) [March 2005]

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