6533b824fe1ef96bd1281675
RESEARCH PRODUCT
Very Long-Distance Magnetic Coupling in a Dicopper(II) Metallacyclophane with Extended π-Conjugated Diphenylethyne Bridges
Miguel JulveJoan CanoDonatella ArmentanoGiovanni De MunnoMaría CastellanoFrancisco R. Fortea-pérezFrancesc LloretSalah-eddine StiribaRafael Ruiz-garcíasubject
Spin polarizationChemistryLigandIntermetallicchemistry.chemical_elementElectronic structurePhotochemistryInductive couplingCopperMagnetic susceptibilityInorganic ChemistryCrystallographyIntramolecular forcePhysical and Theoretical Chemistrydescription
Self-assembly of the rigid rodlike ligand N,N'-4,4'-diphenylethynebis(oxamate) (dpeba) and Cu(2+) ions affords a novel dinuclear copper(II) metallacyclophane (nBu(4)N)(4)[Cu(2)(dpeba)(2)]·4MeOH·2Et(2)O (1) featuring a very long intermetallic distance (r = 15.0 Å). Magnetic susceptibility measurements for 1 reveal a moderately weak but nonnegligible intramolecular antiferromagnetic coupling between the two metal centers across the double para-substituted diphenylethynediamidate bridge (J = -3.9 cm(-1); H = -JS(1)S(2), where S(1) = S(2) = S(Cu) = (1)/(2)). Density functional electronic structure calculations on 1 support the occurrence of a spin polarization mechanism.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-10-19 | Inorganic Chemistry |