Organometallics · 2013 · 49 citations · 48 references
Natural SciencesChemistryInorganic ChemistryOrganic ChemistryOrganometallic ChemistryCoordination ChemistryLigand BindingMetal-ligand BondingTransition Metal ChemistryTransition Metal ComplexesBonding In Coordination CompoundsComplexation ChemistryIntermolecular Metal-ligand InteractionsLigand Effects On ReactivityMetal CoordinationMetal Ion CoordinationMetal Ligand Coordination
The bisimidazolium salt H 2 - 1 (PF 6 ) 2 featuring a bridging 1,4-phenylene group reacts with 0.5 equiv of [PdCl(allyl)] 2 in the presence of Cs 2 CO 3 to give the dinuclear complex [ 2 ](PF 6 ) 2, whereas the reaction of the same bisimidazolium salt with 0.5 equiv of [Ir(Cl) 2 (Cp*)] 2 yields the mononuclear orthometalated complex [ 3 ]PF 6 with one remaining imidazolium unit. The unreacted imidazolium group in complex [ 3 ]PF 6, however, can also be metalated with Rh III to yield the doubly orthometalated heterobimetallic complex [ 4 ]. In complex [ 4 ], each M III center (M = Ir III and Rh III ) is coordinated by one NHC unit and orthometalates the central aryl ring of the ligand.
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