摘要:
Solvolysis of [RhMe(CF3SO3)(2)(Me-3[9]aneN(3))] (1) (Me-3[9]aneN(3) = 1,4,7-trimethyl-1,4,7-triazacyclononane) in CH3CN, DMSO or pyrazole (L) leads to substitution of both trifluoromethylsulfonate ligands and formation of the cationic complexes [RhMeL2(Me-3[9]aneN(3))](CF3SO3)(2) 3-5. In contrast, treatment of [RuCl3(Me-3[9]aneN(3))] (2) with Ag(CF3SO3) in a 1:3 ratio for 2h in CH3CN leads to formation of the tetranuclear complex [{RuCl3(Me-3[9]aneN(3))}(2)Ag-2(CF3SO3)(CH3CN)](CF3SO3) (.) CH3CN (6) with a novel [(RuCl3)(2)Ag-2] core. More forcing conditions enable the substitution of respectively one or two chloride ligands by CH3CN (reflux 18h) or DMF (85degreesC, 1h) to afford [RuCl,(CH3CN)(Me-3[9]aneN(3))](CF3SO3) (7) and [RuCl(DMF)(2)(Me-3[9]aneN(3))](CF3SO3)(2) (8). The heteroleptic sandwich complex [Ru([9]aneS(3))(Me-3[9]aneN(3))](CF3SO3)(2) (9) can be prepared by reduction of 2 with Zn powder in acetone in the presence of 3 equiv. of Ag(CF3SO3), followed by addition of [9]aneS(3) (1,4,7-trithiacy-clononane). The redox potential Edegrees(Ru3+/Ru2+) of +1.87 V vs NHE for 9 is only -0.12 V lower than that of the homoleptic complex [Ru([9]aneS(3))(2)](2+). Crystal structures are reported for 3-9.