A Cyclic Hexairon(<scp>III</scp>) Complex with an Octahedrally Coordinated Sodium Ion at the Center, an Example of the [12]Metallacrown‐6 Structure Type

Caneschi, Andrea; Cornia, Andrea; Lippard, Stephen J.

doi:10.1002/anie.199504671

Cited by 143 publications

(49 citation statements)

References 52 publications

(4 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Even member rings of antiferromagnetic spins are quite common for transition metal ions, like Fe(III) [6][7][8][9][10], Cr(III) [11,12], Cu(II) [13], or Mn(III) [14]. Antiferromagnetic iron rings with N= 6, 8, 10, 12, and 18 have been reported and their properties analyzed in some detail.…”

Section: Introductionmentioning

confidence: 99%

Spin frustration effects in an odd-member antiferromagnetic ring and the magnetic Möbius strip

Cador

Gatteschi

Sessoli

et al. 2005

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

The magnetic properties of the first odd-member antiferromagnetic ring comprising eight chromium(III) ions, S=3/2 spins, and one nickel(II) ion, S=1 spin, are investigated. The ring possesses an even number of unpaired electrons and a S=0 ground state but, due to competing AF interactions, the first excited spin states are close in energy. The spin frustrated ring is visualized by a Möbius strip. The "knot" of the strip represents the region of the ring where the AF interactions are more frustrated. In the particular case of this bimetallic ring electron paramagnetic resonance (EPR) has unambiguously shown that the frustration is delocalized on the chromium chain, while the antiparallel alignment is more rigid at the nickel site.

show abstract

Section: Introductionmentioning

confidence: 99%

Spin frustration effects in an odd-member antiferromagnetic ring and the magnetic Möbius strip

Cador

Gatteschi

Sessoli

et al. 2005

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

show abstract

“…Wheel-shaped clusters are one of the most highly symmetric architectures, [2] which often consist of first-row transition-metal ions. [2a-e] Lanthanide complexes have attracted considerable attention due to their practical properties.…”

mentioning

confidence: 99%

Octalanthanide Wheels Supported by p‐tert‐Butylsulfonylcalix[4]arene

et al. 2004

View full text Add to dashboard Cite

Based on a bottom-up approach, [1] functionalized and structurally unique metal clusters with high nuclearity have been synthesized. Wheel-shaped clusters are one of the most highly symmetric architectures, [2] which often consist of first-row transition-metal ions. [2a-e] Lanthanide complexes have attracted considerable attention due to their practical properties.[3] However, multi-lanthanide complexes are rather rare.[2f, 4] Thus our goal was to develop a new and rational synthetic method to realize lanthanide cluster complexes. As a cluster-forming ligand, we employed a sulfonylcalix [4]arene (H 4 L) (Scheme 1). We have already shown that thiacalixarenes and their derivatives act as multinucleating [5a] or clusterforming ligands.[6] Since lanthanides show strong affinity towards oxygen donors, [7] H 4 L can act as a multidentate, multinucleating ligand via many oxygen sites.[5] Herein we report the syntheses, structures, and magnetic properties of lanthanide wheels, [Ln 8 (L) 4 (AcO) 8 (EtOH) 4 (H 2 O) 4 ] (Ln = Gd Scheme 1.Step-by-step formation of a lanthanide wheel via a mononuclear subunit {Ln(L)} À .

show abstract

“…[1][2][3][4][5][6][7] These clusters have the ability to interact with cations, anions and neutral molecules, leading to potential applications in chemically modified electrodes, as molecular recognition agents, as anion-selective separation agents and so on. [12][13][14][15][16][17] Up to now, there are plenty of examples for the ubiquitous O and/or N-bridged metallacrowns, but only a limited number of literature reports are available concerning S-bridged metallacrowns. Generally, the metallacrowns can be synthesized using either bridging chalcogen ligands, such as SR and OR anions, or multidentate ligands that bridge two metal ions.…”

Section: Introductionmentioning

confidence: 99%

Penta and hexanuclear nickel tiara-like clusters with two different thiolate bridges

et al. 2015

View full text Add to dashboard Cite

Six nickel tiara-like clusters, cyclo-ĳNiĲμ-EDT)] 5 (1), cyclo-{[NiĲμ-SiPe) 2 ] 6 } (2), cyclo-ĳNi 6 Ĳμ-StBu) 4 Ĳμ-EDT) 4 ](3), cyclo-ĳNi 6 Ĳμ-StBu) 4 Ĳμ-PDT) 4 ] (4), cyclo-ĳNi 6 Ĳμ-SPh) 4 Ĳμ-EDT) 4 ] (5) and cyclo-ĳNi 6 Ĳμ-SPh) 4 Ĳμ-PDT) 4 ] (6) (StBu = 2-methyl-2-propanethiol, EDT = 1,2-ethanedithiol, PDT = 1,3-propanedithiol, SiPe = isopentylthiol, SPh = thiophenol have been successfully synthesized and characterized. All the clusters were derived from a designed preparation by a direct synthetic route involving reactions of NiĲClO 4 ) 2 with mixed thiolate or disulfide ligands which have discrepancy in their coordination ability. Intriguingly, cluster 1 is an infrequent pentanuclear tiara. Clusters 3 and 4 are hexanuclear tiaras with two different types of mono and bidentate aliphatic thiolates. Clusters 5 and 6 exhibit similar structures with monoaromatic thiolate and bidentate aliphatic thiolate ligands. The -SPh ligands were generated from an in situ reaction of the disulfide precursor through cleavage of the S-S bond. These heretofore unknown additions to the cyclo-ĳNiĲμ-SR) 2 ] n tiara family are of particular interest, which are often constructed by just one kind of thiolate ligand. CrystEngCommThis journal is

show abstract

A Cyclic Hexairon(III) Complex with an Octahedrally Coordinated Sodium Ion at the Center, an Example of the [12]Metallacrown‐6 Structure Type

Cited by 143 publications

References 52 publications

Spin frustration effects in an odd-member antiferromagnetic ring and the magnetic Möbius strip

Spin frustration effects in an odd-member antiferromagnetic ring and the magnetic Möbius strip

Octalanthanide Wheels Supported by p‐tert‐Butylsulfonylcalix[4]arene

Penta and hexanuclear nickel tiara-like clusters with two different thiolate bridges

Contact Info

Product

Resources

About