Rhodium(1) carbonyl complexes with alkyl sulphoxides and sulphides |
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| Authors: | Dipak K Dutta Mono M Singh |
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| Institution: | (1) Department of Chemistry, Dibrugarh University, Dibrugarh, 786004 Assam, India;(2) Present address: Institute for Inorganic Chemistry, Munich University, Meiserstraße 1, 8000 Munich 2, Germany |
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| Abstract: | Summary Rhodium(I) carbonyl complexes, namely Rh(CO)X(R2SO)2 (R = Me, n-Pr or n-Bu) and Rh(CO)X(R 2S)2 (R = Me, Et or i-Pr) and X = CI or Br, have been prepared and characterized. The compounds Rh(CO)XP(OPh)3]2 X = Cl or Br, have also been isolated. In the R2SO and R2S complexes, the carbonyl stretching frequencies occur atca. 2020–2025 cm–1 andca. 1950–1980 cm–1 respectively. In the R2SO ligand containing complexes v(S-O) occurs atca. 1100–1125 cm–1 indicative of metal-sulphur coordination. In presence of HBF4, the addition of an excess of Me2SO to (OC)2Rh( -Cl)2Rh(CO)2 gives Rh(Me2SO)6]3+ in which the central metal atom undergoes spontaneous oxidation from Rh1(d8) to RhIII(d6). The complexes have been characterized additionally by u.v.vis. spectra, conductivity measurements and by elemental analyses. |
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