摘要：

Reaction of [Rh(H2O)6]3+ with 2 molar equivalents of 1,4,7-trithiacyclononane (L) gives the complex cation [RhL2]3+. The single-crystal X-ray structure of [RhL2][PF6]3 shows a centrosymmetric complex around octahedral RhIII with Rh–S 2.332(2). The crystals are monoclinic, space group I2/m(alternative setting of C2/m, no. 12), with a= 11.329(3), b= 9.692(3), c= 14.909(4), β= 101.77(2)°, and Z= 2. Cyclic voltammetry of [RhL2][PF6]3 in MeCN (0.1 mol dm–3 NBun4PF6) at 20°C at platinum electrodes shows two chemically reversible reductions at 1E=–0.71 V, ΔEp= 71 mV and 2E=–1.08 V, ΔEp= 127 mV vs. ferrocene–ferrocenium, which are assigned to RhIII–RhII and RhII–RhI redox couples respectively.

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