Syntheses, characterization and reactivity of dinuclear ruthenium-nickel complexes with hexane-2,5-dione bis(thiosemicarbazonato) ligands

Publication date: Available online 10 July 2018Source: Journal of Organometallic ChemistryAuthor(s): Duo-Wen Fang, Ai-Quan Jia, Xian-Ping Dong, Zhifeng Xin, Qian-Feng ZhangAbstractTreatment of hexane-2,5-dione bis(thiosemicarbazones) ([CH3‒C{ = N‒NH‒C(=S)‒NHR}‒CH2]2, R = H, L1H2; CH3, L2H2‒Me; CH2CH3, L3H2‒Et; C6H5, L4H2‒Ph) with nickel(II) acetate hydrate in refluxing ethanol gave a series of NiIIN2S2 metalloligands [Ni(L-R)] for the generation of hetero-bimetallic complexes. The reaction of equal mole each of [Ni(L1)], [Ni(L2‒Me)], [Ni(L3‒Et)], or [Ni(L4‒Ph)] with [RuCl2(dmso)4] (dmso = dimethyl sulfoxide) at reflux resulted in isolation of neutral dinuclear ruthenium-nickel complexes [RuCl2{(Ni(L1)}(dmso)2] (1), [RuCl2{(Ni(L2‒Me)}(dmso)2] (2), [RuCl2{(Ni(L3‒Et)}(dmso)2] (3), and [RuCl2{(Ni(L4‒Ph)}(dmso)2] (4). Interaction of [Ni(L-R)] with [CpRu(PPh3)2Cl] (Cp‒ = cyclopentadienyl) at room temperature led to formation of cationic dinuclear organoruthenium-nickel complexes [CpRu{(Ni(L1)}(PPh3)]Cl (5), [CpRu{(Ni-(L2‒Me)}(PPh3)]Cl (6), [CpRu{(Ni(L3‒Et}(PPh3)]Cl (7), and [CpRu{(Ni(L4‒Ph}(PPh3)]Cl (8). New bimetallic ruthenium-nickel complexes 1–8 have been characterized spectroscopically, of which molecular structures of three complexes [RuCl2{(Ni(L2‒Me)}(dmso)2]·CH2Cl2 (2·CH2Cl2), [CpRu-{(Ni(L2‒Me)}(PPh3)]Cl⋅EtOH (6⋅EtOH), and [CpRu{(Ni(L3‒Et}(PPh3)]Cl (7⋅H2O) have been established by single-crystal X-ray cryst...

Source: Journal of Organometallic Chemistry - July 12, 2018 Category: Chemistry Source Type: research