Formation of HoIII Trinuclear Clusters and GdIII Monodimensional Polymers Induced by ortho and para Regioisomers of Pyridyl‐Functionalised β‐Diketones: Synthesis, Structure, and Magnetic Properties

Andrews, Philip C.; Deacon, Glen B.; Frank, René; Fraser, Ben; Junk, Peter Courtney; MacLellan, Jonathan G.; Massi, Massimiliano; Moubaraki, Boujemaa; Murray, Keith S.; Silberstein, Morry

doi:10.1002/ejic.200801006

Cited by 63 publications

(21 citation statements)

References 46 publications

(34 reference statements)

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“…Scheme 2. Indolizines A and B obtained from 2-Py-CH=C(Ac) 2 . inate with either acetophenone, 2-acetylpyridine, or 2-acetylthiophene in toluene at 0 • C with yields between 72 and 95 % in the presence of sodium hydride [29]. As already discussed in some detail, β -diketones tend to tautomerize [30 -33] with the ketoenol equilibrium strongly dependent on the polarity of the solvent [34,35].…”

Section: Resultsmentioning

confidence: 99%

One-pot Synthesis of 3-Aryl-substituted 1-Hydroxy-2-acylindolizines

Kloubert

Kretschmer

Görls

et al. 2012

Zeitschrift Für Naturforschung B

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A new method for the formation of C-C bonds in a one-pot synthesis of 1-hydroxy-2-acyl-3-arylindolizines (acyl: 2-pyridylformyl, thienylformyl; aryl: phenyl, pyridyl, thienyl) from the reaction of 1,3-diketones with aldehydes has been evaluated. X-Ray diffraction studies of single crystals have provided structural information about the so-formed indolizines. In the crystalline state, the hydroxyl units form intra-or intermolecular hydrogen bonds to the acyl functionalities. The color of these indolizines depends on the pH value of the solvent.

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Section: Resultsmentioning

confidence: 99%

One-pot Synthesis of 3-Aryl-substituted 1-Hydroxy-2-acylindolizines

Kloubert

Kretschmer

Görls

et al. 2012

Zeitschrift Für Naturforschung B

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“…To maintain the steric profile of the protecting ligand, we decided to exchange pyridyl substituents for the two phenyl rings. 42 We first synthesised the ligands 5H and 6H: the former contains the N donor atom adjacent to the carbonyl group, hence having the potential to interact with the cluster core, whereas the N donor atom in the latter is in position 4`. Due to the interaction of the pyridyl N atoms with the lanthanoid centres, no tetranuclear or pentanuclear motifs were isolated.…”

Section: Pyridyl-functionalised β-Diketonate As Protecting Ligandsmentioning

confidence: 99%

Variation of structural motifs in lanthanoid hydroxo clusters by ligand modification

et al. 2013

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The isolation of multinuclear lanthanoid clusters with different nuclearities and geometries commenced as a serendipitous discovery and is now the focus of intense research, not only from a coordination chemistry point of view, but also in a variety of applied fields. This perspective analyses the structural library of reported lanthanoid hydroxo clusters to find trends linking their structural motifs with factors such as the specific lanthanoid, the bulkiness of the outer shell of ligands, the coordinating nature of the ligands, and the synthetic methodology. While trends are indeed starting to appear, does this signify that the synthetic chemistry of lanthanoid clusters has now progressed from serendipity to a more rational approach?

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“…It is possible that these stay in solution in the form of soluble complexes. It is known that lanthanides can form cluster species with pyridyl-β-diketonate ligands related to H 2 L. [26] The intrinsic interest of complex 1 prompted the direct preparation of this compound from its simplest components. For this, a synthetic procedure was devized that involved the use of two sources of Co II present in equivalent amounts: Co(AcO) 2 ·4H 2 O, which provided a built-in base to deprotonate H 2 L, and Co(NO 3 ) 2 ·6H 2 O, which furnished the nitrate counter-ions of the cationic cluster that resulted from the reaction.…”

Section: Synthesis and Reactivitymentioning

confidence: 99%

A Molecular Chain of Four CoII Ions Stabilized by a Tris-Pyridyl/Bis-?-Diketonate Ligand

et al. 2009

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The synthesis and characterization of a tris-pyridyl/bis-β-diketone molecule (H 2 L) is reported. This compound acts as a hexadentate ligand towards Co II to facilitate the assembly of a tetranuclear molecular chain of closely spaced metals with formula [Co 4 L 2 (MeOH) 8 ](NO 3 ) 4 (1), which exhibits a very flat [Co 4 L 2 ] 4+ platform, as determined by single-crystal X-ray diffraction crystallography. Complex 1 readily exchanges axial methanol ligands with water molecules. The bulk magnetization of the resulting hydrate, 1a, shows that the metals in the [Co 4 L 2 ] 4+ moiety exhibit spin-orbit coupling and antiferromagnetic exchange interactions.

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Formation of Ho^III Trinuclear Clusters and Gd^III Monodimensional Polymers Induced by ortho and para Regioisomers of Pyridyl‐Functionalised β‐Diketones: Synthesis, Structure, and Magnetic Properties

Abstract: Reaction of GdCl 3 (H 2 O) 6 and 1,3-bis(pyridin-4-yl)propane-1,3-dione in methanol with an excess of triethylamine produced a monodimensional polymeric chain [Gd(p-dppd)

Cited by 63 publications

References 46 publications

One-pot Synthesis of 3-Aryl-substituted 1-Hydroxy-2-acylindolizines

One-pot Synthesis of 3-Aryl-substituted 1-Hydroxy-2-acylindolizines

Variation of structural motifs in lanthanoid hydroxo clusters by ligand modification

A Molecular Chain of Four CoII Ions Stabilized by a Tris-Pyridyl/Bis-?-Diketonate Ligand

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