The bridging azido ligand as a central “player” in high-nuclearity 3d-metal cluster chemistry

Escuer, Albert; Esteban, Jordi; Perlepes, Spyros P.; Stamatatos, Theocharis C.

doi:10.1016/j.ccr.2014.04.001

Cited by 158 publications

(113 citation statements)

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“…This leads to a more symmetrical core for the {Cr 3 Dy 3 }-compound (8) compared with that of the {Cr 3 Ho 3 }-compound (9). Thus, the three monodentate ligands on each of the three Ho centers in (9) are all water molecules, whereas in (8) these three ligands are provided by two pivalates and one water molecule. Furthermore, in (8) intramolecular hydrogen bonding constrains these three ligands to be on the same side of the {Cr 3 Dy 3 } core.…”

Section: ■ Introductionmentioning

confidence: 99%

Coordination Cluster Nuclearity Decreases with Decreasing Rare Earth Ionic Radius in 1:1 Cr/Ln N-Butyldiethanolamine Compounds: A Journey across the Lanthanide Series from Cr₄^IIILa₄–Cr₄^IIITb₄ via Cr₃^IIIDy₃ and Cr₃^IIIHo₃ to Cr₂^IIIEr₂–Cr₂^IIILu₂

et al. 2015

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Reactions of the N-substituted diethanolamine ligand N-n-butyldiethanolamine with chromium(II) and lanthanide(III)/rare earth salts (Ln = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y) in the presence of coligands give access to three series of isostructural 1:1 3d(Cr(III))/4f(Ln(III)) coordination cluster compounds that can be designated in terms of octanuclear "square-in-square" (Ln = La-Tb), hexanuclear "triangle-in-triangle" (Ln = Dy, Ho, Y) and tetranuclear "butterfly" or defect dicubane core (Ln = Er-Lu) topologies as revealed by single-crystal X-ray crystallographic analysis. The bulk magnetic properties were also measured. The influences of the various components in the reaction system on the final topology and the role of the ionic radius are discussed.

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Section: ■ Introductionmentioning

confidence: 99%

Coordination Cluster Nuclearity Decreases with Decreasing Rare Earth Ionic Radius in 1:1 Cr/Ln N-Butyldiethanolamine Compounds: A Journey across the Lanthanide Series from Cr₄^IIILa₄–Cr₄^IIITb₄ via Cr₃^IIIDy₃ and Cr₃^IIIHo₃ to Cr₂^IIIEr₂–Cr₂^IIILu₂

et al. 2015

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“…The most habitual strategies to reach this objective are: (i) using simple bridging ligands as cyanide (CN − ) [12], dicyanamide (N(CN) 2 − ) [13][14][15], azide (N 3 − ) [16][17][18][19][20], oxalato (C 2 O 4 2− ) [21], = 3,6-disubstituted-2,5-dihydroxy-1,4-benzoquinone dianion, see Scheme 1). These ligands contain an aromatic ring replacing the central C=C skeleton of oxalato and can also act as bis-bidentate ligands coupling the metal centers they bridge [25].…”

Section: Introductionmentioning

confidence: 99%

A Family of Lanthanoid Dimers with Nitroanilato Bridges

et al. 2016

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Abstract:The first complexes with lanthanoid ions and the nitroanilato ligand have been synthesized (nitroanilate dianion = [C 6 O 4 (NO 2 ) 2 ] 2− = dianion of the 3,6-dinitro-2,5-dihydroxo-1,4-dibenzoquinone ligand). This family of dimers can be formulated as [Ln 2 (C 6 O 4 (NO 2 ) 2 ) 3 (H 2 O) 10 ]·6H 2 O with Ln(III) = Sm (1), Gd (2), Tb (3), Dy (4), Ho (5), and Er (6). The X-ray structure of this family of isostructural complexes shows that they all present a dimeric structure where the Ln 3+ ions are connected by a bis-bidentate nitroanilato ligand. Each metal completes its nonacoordination environment with a terminal bidentate nitroanilato ligand and five water molecules in a slightly distorted tri-capped trigonal prismatic geometry. The magnetic properties of this family show the expected contributions of the lanthanoid ions without any noticeable magnetic interaction through the nitroanilato ligand. The compounds present luminesce of the nitroanilato ligand superimposed with a weaker emission from the lanthanide ion in compound 5 (Ho).

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“…[55] To check the magnetic properties of the reported compounds, susceptibility measurements were performedf or the series of compounds 1 and 2. [55] To check the magnetic properties of the reported compounds, susceptibility measurements were performedf or the series of compounds 1 and 2.…”

Section: Susceptibility Studiesmentioning

confidence: 99%

From Mesocates to Helicates: Structural, Magnetic and Chiro‐Optical Studies on Nickel(II) Supramolecular Assemblies Derived from Tetradentate Schiff Bases

Mayans

Font-Bardı́a

Bari

et al. 2018

Chemistry A European J

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The systematic reactions of a family of tetradentate pyridyl/imine and quinolyl/imine racemic or enantiopure Schiff bases with Ni(NO ) or Ni(ClO ) in the presence of sodium azide yielded, as a function of the starting racemic, chiral or achiral base, a set of chiral, meso or achiral complexes. In all cases, the compounds consist of two Ni cations linked by a double azido bridge in its end-on coordination mode. All the dimers exhibit a mesocate supramolecular structure and one of them, the unprecedented mix of helicate and mesocate in 2:1 ratio. The transition from mesocate to helicate conformation has been reached by tuning the flexibility of the central spacers of the Schiff bases and the size of the substituents. Electronic circular dichroism (ECD) studies have been performed for two pairs of enantiomers and interpreted by means of DFT calculations. Susceptibility measurements show a ferromagnetic coupling between the Ni cations mediated by the end-on azido bridges.

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The bridging azido ligand as a central “player” in high-nuclearity 3d-metal cluster chemistry

Cited by 158 publications

References 254 publications

Coordination Cluster Nuclearity Decreases with Decreasing Rare Earth Ionic Radius in 1:1 Cr/Ln N-Butyldiethanolamine Compounds: A Journey across the Lanthanide Series from Cr₄^IIILa₄–Cr₄^IIITb₄ via Cr₃^IIIDy₃ and Cr₃^IIIHo₃ to Cr₂^IIIEr₂–Cr₂^IIILu₂

Coordination Cluster Nuclearity Decreases with Decreasing Rare Earth Ionic Radius in 1:1 Cr/Ln N-Butyldiethanolamine Compounds: A Journey across the Lanthanide Series from Cr₄^IIILa₄–Cr₄^IIITb₄ via Cr₃^IIIDy₃ and Cr₃^IIIHo₃ to Cr₂^IIIEr₂–Cr₂^IIILu₂

A Family of Lanthanoid Dimers with Nitroanilato Bridges

From Mesocates to Helicates: Structural, Magnetic and Chiro‐Optical Studies on Nickel(II) Supramolecular Assemblies Derived from Tetradentate Schiff Bases

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The bridging azido ligand as a central “player” in high-nuclearity 3d-metal cluster chemistry

Cited by 158 publications

References 254 publications

Coordination Cluster Nuclearity Decreases with Decreasing Rare Earth Ionic Radius in 1:1 Cr/Ln N-Butyldiethanolamine Compounds: A Journey across the Lanthanide Series from Cr4IIILa4–Cr4IIITb4 via Cr3IIIDy3 and Cr3IIIHo3 to Cr2IIIEr2–Cr2IIILu2

Coordination Cluster Nuclearity Decreases with Decreasing Rare Earth Ionic Radius in 1:1 Cr/Ln N-Butyldiethanolamine Compounds: A Journey across the Lanthanide Series from Cr4IIILa4–Cr4IIITb4 via Cr3IIIDy3 and Cr3IIIHo3 to Cr2IIIEr2–Cr2IIILu2

A Family of Lanthanoid Dimers with Nitroanilato Bridges

From Mesocates to Helicates: Structural, Magnetic and Chiro‐Optical Studies on Nickel(II) Supramolecular Assemblies Derived from Tetradentate Schiff Bases

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Coordination Cluster Nuclearity Decreases with Decreasing Rare Earth Ionic Radius in 1:1 Cr/Ln N-Butyldiethanolamine Compounds: A Journey across the Lanthanide Series from Cr₄^IIILa₄–Cr₄^IIITb₄ via Cr₃^IIIDy₃ and Cr₃^IIIHo₃ to Cr₂^IIIEr₂–Cr₂^IIILu₂

Coordination Cluster Nuclearity Decreases with Decreasing Rare Earth Ionic Radius in 1:1 Cr/Ln N-Butyldiethanolamine Compounds: A Journey across the Lanthanide Series from Cr₄^IIILa₄–Cr₄^IIITb₄ via Cr₃^IIIDy₃ and Cr₃^IIIHo₃ to Cr₂^IIIEr₂–Cr₂^IIILu₂