C−H Activation by a Diplatinum(II) Complex: Isolation and Structures of [Pt2(CH3)(SMe2)Ph2(ttab)][BAr‘4] and [Pt2(H2O)2Ph2(ttab)][BAr‘4]2 (ttab = 1,2,4,5-Tetrakis(1-N-7-azaindolyl)benzene)
摘要:
The dinuclear Pt(II) complex Pt-2(CH3)(4)(ttab) (1; ttab = 1,2,4,5-tetrakis(1-N-7-azaindolyl)benzene) has been found to activate multiple benzene molecules by cleaving a C-H bond in the presence of[H(Et2O)(2)][BAr'(4)] (Ar' = 3,5-bis(trifluoromethyl)phenyl). The unprecedented dinuclear Pt(H) product [Pt-2(CH3)(SMe2)Ph-2(ttab)][BAr'(4)] (2), which contains two phenyl groups on one Pt(H) center, has been isolated from the 1:1 reaction of 1 with [H(Et2O)(2)][BAr'(4)]. The novel dinuclear Pt(H) complex [Pt-2(H2O)(2)Ph-2(ttab)][BAr'(4)](2) (3) has been isolated from the 1:2 reaction of 1 with [H(Et2O)(2)][BAr'(4)] when reagent-grade solvents were used in the recrystallization process. The structures of 2 and 3 have been established by X-ray diffraction analyses.