Heteronuclear 3 d/Dy^III Coordination Clusters as Catalysts in a Domino Reaction

Abstract

Three isoskeletal tetranuclear coordination clusters with general formula [MII2DyIII2L4(EtOH)6](ClO4)2⋅2 EtOH, (M=Co, 1; M=Ni, 2) and [NiII2DyIII2L4Cl2(CH3CN)2]⋅2 CH3CN (3), have been synthesized and characterized. These air‐stable compounds, and in particular 3, display efficient homogeneous catalytic behavior in the room‐temperature synthesis of trans‐4,5‐diaminocyclopent‐2‐enones from 2‐furaldehyde and primary or secondary amines under a non‐inert atmosphere.

Topological insights in polynuclear Ni/Na coordination clusters derived from a schiff base ligand

“…Previously, this ligand has been involved in the synthesis of homometallic [68][69][70][71] and heterometallic CCs [72][73][74][75]. We recently employed this ligand in 3d/4f chemistry to synthesise a family of homogeneous efficient catalysts towards a domino reaction [76]. Interestingly, when H 2 L1 was employed in Ni(II) chemistry, a tetranuclear Ni 4 CC exhibiting ferromagnetic interactions at low temperatures was isolated.…”

Cobalt(ii/iii), nickel(ii) and copper(ii) coordination clusters employing a monoanionic Schiff base ligand: synthetic, topological and computational mechanistic aspects

“…The transformation of the perchlorate anion to chlorine anion is not unusual and has been seen before. 72,73 More crystallographic data are necessary to perform a complete structural comparison, however the present findings are indicative that HL 1 , despite offering similar coordination sites to other similar diprotic ligands, coordinates completely different to them and thus its coordination chemistry can lead to new, interesting and unprecedented topologies.…”

Highly Efficient Tetranuclear ZnII2LnIII2 Catalysts for the Friedel–Crafts Alkylation of Indoles and Nitrostyrenes

“…We recently initiated a project on the synthesis of 3d/4f CCs stabilized by the Schiff base organic ligand H2L [(E)-(2-hydroxy-3-methoxybenzylidene-amino)phenol], that would display catalytic properties [57][58][59]. We also reported the synthesis and characterisation of a series of isoskeletal [60] (Figure 1).…”

“…In 3d/4f chemistry, only a few polynuclear CCs have been successfully used as homogenous catalysts [54][55][56]. We recently initiated a project on the synthesis of 3d/4f CCs stabilized by the Schiff base organic ligand H2L [(E)-(2-hydroxy-3-methoxybenzylidene-amino)phenol], that would display catalytic properties [57][58][59]. We also reported the synthesis and characterisation of a series of isoskeletal [60] tetranuclear Zn II 2Ln III 2 CCs formulated as [Zn II 2Ln III 2L4(NO3)2(DMF)2] (1Ln) where Ln is Y (1Y), Sm (1Sm), Eu (1Eu) Gd (1Gd), Dy (1Dy), Tb (1Tb) and Yb (1Yb) possessing a defect dicubane topology (Figure 1).…”