Systematic assembly of the double molecular boxes: {Cs [CpCo(CN)3]4[Cp*Ru]3} as a tridentate ligand
نویسندگان
چکیده
Cubic cage compounds composed of Co-CN-Ru linkages have been prepared which illustrate the following features: (i) new motifs for alkali metal ion complexation (i.e., cationic receptors for cations), (ii) a new family of triaza-metalloligands, and (iii) a double box-like cage. The cages are synthesized by the condensation of [CpCo(CN)3] and [Cp*Ru(NCMe)3] (cyclopentadienyl, Cp; pentamethylcyclopentadienyl, Cp*) the presence of Cs . The species {Cs {[CpCo(CN)3]4[Cp*Ru]4} and {Cs {[CpCo(CN)3] 4[Cp*Ru]3[Cp*Rh]} illustrate the box-completion reaction Cs Co4Ru3 M (M Cp*Rh2 , Cp*Ru ). With the naked ion precursors [Na(NCMe)6] and [Fe(NCMe)6] , the box-completion reactions afforded {Na{Cs [CpCo(CN)3]4[Cp*Ru]3]}2} and {Fe{Cs [CpCo(CN)3]4[Cp*Ru]3]}2} . These cages provide the first examples, to our knowledge, of the double-box motif.
منابع مشابه
Structural and mechanistic studies on ion insertion into the molecular box {[CpCo(CN)3]4[Cp*Ru]4}
The molecular box [CpCo(CN)3]4[Cp*Ru]4 (Co4Ru4) reacts readily with a variety of monocations to form M Co4Ru4 (M1⁄4Kþ, Csþ, Rbþ). Ion competition experiments, monitored by ESI-MS, show that the molecular box binds the smaller Kþ more rapidly than Csþ, but that thermodynamically Co4Ru4 prefers the larger ion. The rates of ion-insertion for K þ and Csþ into Co4Ru4 were found to qualitatively foll...
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