Binuclear ruthenium complexes containing bridging dithiolate and dppm ligands: X-ray structures of [Ru 2(CO) 4(μ-SCH 2CH 2CH 2S)(μ-dppm)] and [Ru 2(CO) 4{(μ-SC 6H 3(CH 3)S}(μ-dppm (original) (raw)

The reactions of [Ru 3 (CO) 10 (m-dppm)] (4) with 1,2-ethanedithiol, 1,3-propanedithiol and 3,4-toluenedithiol in refluxing THF afforded the dinuclear dithiolato complexes [Ru 2 (CO) 4 (m-SCH 2 CH 2 S)(m-dppm)] (5), [Ru 2 (CO) 4 (m-SCH 2 CH 2 CH 2 S)(m-dppm)] (6) and [Ru 2 (CO) 4 {m-SC 6 H 3 (CH 3 )S}(m-dppm)] (7), respectively. Protonation of complexes 5 and 6 by tetrafluoroboric acid in CD 2 Cl 2 resulted in the formation of cationic hydrido complexes [(m-H)Ru 2 (CO) 4 (m-SCH 2 CH 2 S)(m-dppm)] ' (8) and [Ru 2 (CO) 4 (m-SCH 2 CH 2 CH 2 S)(m-dppm)] ' (9) isolated as their PF 6 ( salts. Compounds 5 and 6 are also obtained from the reactions of dppm with [Ru 2 (CO) 6 (m-SCH 2 CH 2 S)] (10) and [Ru 2 (CO) 6 (m-SCH 2 CH 2 CH 2 S)] (11), respectively. Protonation of 10 and 11 with tetrafluroboric acid gives the mono-protronated species [(m-H)Ru 2 (CO) 6 (m-SCH 2 CH 2 S)] ' (12) and [(m-H)Ru 2 (CO) 6 (m-SCH 2 CH 2 CH 2 S)] ' (13), respectively. All the compounds have been characterised by IR, 1 H NMR, 31 P{ 1 H} and mass spectroscopic data, together with single crystal X-ray diffraction studies for 6 and 7. #

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