The reaction of \[Cp\+\%t\%RhCl\-2\]\-2(1) (Cp\+\%t\%=η\+5\|\{\}\+\%t\%Bu\-2C\-5\|H\-3) with 1,2\|dilithium dichalcogenolate carborane Li\-2E\-2C\-2B\-\{10\}H\-\{10\}(E=S, Se) afforded the 16\|electron rhodium(Ⅲ) half\|sandwich complexes \{Cp\+\%t\%Rh(E\-2C\-2B\-\{10\}H\-\{10\})\}\3a), Se(3b)\]. 18\|Electron trimethyl phosphine rhodium(Ⅲ) half\|sandwich complexes Cp\+\%t\%Rh(PMe\-3)(E\-2C\-2B\-\{10\}H\-\{10\})\. 18\|Electron trimethyl phosphine rhodium(Ⅲ) half\|sandwich complexes Cp\+\%t\%Rh(PMe\-3)(E\-2C\-2B\-\{10\}H\-\{10\})\4a), Se(4b), Te(4c)\] can be synthesized both by addition of PMe\-3 into 16\|electron complexes can be synthesized both by addition of PMe\-3 into 16\|electron complexes 3a, 3b and by the reaction Cp\+\%t\%Rh(PMe\-3)Cl\-2(2) with Li\-2E\-2C\-2B\-\{10\}H\-\{10\}(\{E=S\}, Se, Te). The molecular geometry of 4b was determined by X\|ray diffraction structural analysis.
