Synthesis and Crystal Structure of Rhodium(II) Pentafluorobenzoate Dimer with Axial Methanol Molecules

Abstract

The title compound, dinuclear rhodium(II) pentafluorobenzoate with methanol [Rh₂(O₂CC₆F₅)₄(CH₃OH)₂], was isolated and the crystal structure was determined by the single-crystal X-ray diffraction method at 293 K. It crystallizes in the monoclinic space group P2₁/c with a = 7.889(3)Å, b = 34.808(14)Å, c = 12.983(5)Å, β = 103.930(7)°, V = 3460(2)ų, D_x = 2.139 g/cm³, and Z = 4. The R1 [I > 2σ(I)] and wR2 (all data) values are 0.0319 and 0.0747, respectively, for all 8031 independent reflections. The Rh-Rh distance is 2.3829(9)Å and the axial Rh-O (methanol) distances are 2.2689(19) and 2.254(2)Å. The ¹³C and ¹⁹F NMR spectra showed that the dimer structure is preserved in THF.