ChemInform Abstract: THE STABILIZATION OF LOW OXIDATION STATE TRANSITION METAL COMPLEXES. PREPARATION AND ELECTROCHEMISTRY OF COBALT(II) UNSATURATED MACROCYCLIC COMPLEXES AND THE STABILIZATION OF A COBALT(I) DERIVATIVE. CRYSTAL AND MOLECULAR STRUCTURES OF (2,6‐DIACETYLPYRIDINE N,N′‐DIMETHYL‐N,N′‐1,10‐PHENANTHROLINE‐2,9‐DIYLDIHYDRAZONE)BIS(METHANOL)COBALT(2+) AND ‐(TRIMETHYL PHOSPHITE)COBALT(1+) TETRAFLUOROBORATE

Ansell, Christopher W. G.; Lewis, Jack; Liptrot, Michael C.; Raithby, P. R.; Schroeder, M.

doi:10.1002/chin.198247312

Cited by 3 publications

(6 citation statements)

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“…When the reaction was performed in the presence of the "innocent" BF 4 − anion, compound 1 with two water molecules as the axial ligands was synthesized according to the published method. 17 Using compound 1 as the starting material, compounds 2−4 were synthesized by the metathetical reaction with the appropriate anions. The phase purity of the bulk samples was confirmed by PXRD spectra and elemental analysis (Supporting Information, Figure S1).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…19 The powder of the starting material 1 was synthesized according to a literature procedure. 17 The crystals of 1−4 for single-crystal X-ray analyses and property measurements were prepared by the following methods.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…[ (1). The obtained orange powder (33 mg, 0.05 mmol) synthesized according to the literature 17 was dissolved in a mixed solvent containing 4 mL of acetonitrile and 2 mL of water. Orange block single crystals formed after slow evaporation in a dark place for 3 days.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…As a matter of fact, this ligand was reported to yield a series of transition-metal complexes where the axial ligand can be replaced by a large number of different ligands, such as water, pyridine, imidazole, and so on. 17 In this work, from the reported compound 1), 18 we successfully synthesized and structurally characterized three closely related compounds, [Co II (tdmmb…”

Section: ■ Introductionmentioning

confidence: 99%

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Probing the Effect of Axial Ligands on Easy-Plane Anisotropy of Pentagonal-Bipyramidal Cobalt(II) Single-Ion Magnets

et al. 2016

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We herein reported the synthetic, structural, computational, and magnetic studies of four air-stable heptacoordinated mononuclear cobalt(II) complexes, namely, [Co(tdmmb)(HO)][BF] (1), [Co(tdmmb)(CN)]·2HO (2), [Co(tdmmb)(NCS)] (3), and [Co(tdmmb)(SPh)] (4) (tdmmb = 1,3,10,12-tetramethyl-1,2,11,12-tetraaza[[3](2,6)pyridino[3](2,9)-1,10-phenanthrolinophane-2,10-diene; SPh = thiophenol anion). Constrained by the rigid pentadentate macrocyclic ligand tdmmb, the Co centers in all of these complexes are in the heptacoordinated pentagonal-bipyramidal geometry. While the equatorial environments of these complexes remain very similar to each other, the axial ligands are systematically modified from C to N to O to S atoms. Analyses of the magnetic data and the ab initio calculations both reveal large easy-plane magnetic anisotropy (D > 0) for all four complexes. While the experimentally obtained D values do not show any clear tendency when the axial coordinated atoms change from C to N to O atoms (complexes 1-3), the largest value is for the heavier and softer S-atom-coordinated complex 4. Because of significant magnetic anisotropy, all four complexes are field-induced single-ion magnets. This work represents a delicate modification of the magnetic anisotropy by tuning the chemical environment of the metal centers.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Experimental Sectionmentioning

confidence: 99%

Section: ■ Experimental Sectionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Probing the Effect of Axial Ligands on Easy-Plane Anisotropy of Pentagonal-Bipyramidal Cobalt(II) Single-Ion Magnets

et al. 2016

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“…A variety of 3d metal complexes characterized by a pentagonal bipyramid coordination environment based on this ligand was reported since 1980;. 15,[24][25][26][27][28] this included a Ni(II) derivative. 29 Using the latter complex as building unit, we prepared a 1-D CN-bridged Ni-Cr coordination polymer which is the first example of a ferromagnetic SCM with heptacoordinated Ni(II) as the source of Ising anisotropy.…”

Section: Introductionmentioning

confidence: 99%

A ferromagnetic Ni(ii)–Cr(iii) single-chain magnet based on pentagonal bipyramidal building units

Bretosh

Béreau

Duhayon

et al. 2020

Inorg. Chem. Front.

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Fifty Shades of Phenanthroline: Synthesis Strategies to Functionalize 1,10-Phenanthroline in All Positions

Queffélec,

Pati,

Pellegrin

2024

Chem. Rev.

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1,10-Phenanthroline (phen) is one of the most popular ligands ever used in coordination chemistry due to its strong affinity for a wide range of metals with various oxidation states. Its polyaromatic structure provides robustness and rigidity, leading to intriguing features in numerous fields (luminescent coordination scaffolds, catalysis, supramolecular chemistry, sensors, theranostics, etc.). Importantly, phen offers eight distinct positions for functional groups to be attached, showcasing remarkable versatility for such a simple ligand. As a result, phen has become a landmark molecule for coordination chemists, serving as a must-use ligand and a versatile platform for designing polyfunctional arrays. The extensive use of substituted phenanthroline ligands with different metal ions has resulted in a diverse array of complexes tailored for numerous applications. For instance, these complexes have been utilized as sensitizers in dye-sensitized solar cells, as luminescent probes modified with antibodies for biomaterials, and in the creation of elegant supramolecular architectures like rotaxanes and catenanes, exemplified by Sauvage’s Nobel Prize-winning work in 2016. In summary, phen has found applications in almost every facet of chemistry. An intriguing aspect of phen is the specific reactivity of each pair of carbon atoms ([2,9], [3,8], [4,7], and [5,6]), enabling the functionalization of each pair with different groups and leading to polyfunctional arrays. Furthermore, it is possible to differentiate each position in these pairs, resulting in non-symmetrical systems with tremendous versatility. In this Review, the authors aim to compile and categorize existing synthetic strategies for the stepwise polyfunctionalization of phen in various positions. This comprehensive toolbox will aid coordination chemists in designing virtually any polyfunctional ligand. The survey will encompass seminal work from the 1950s to the present day. The scope of the Review will be limited to 1,10-phenanthroline, excluding ligands with more intracyclic heteroatoms or fused aromatic cycles. Overall, the primary goal of this Review is to highlight both old and recent synthetic strategies that find applicability in the mentioned applications. By doing so, the authors hope to establish a first reference for phenanthroline synthesis, covering all possible positions on the backbone, and hope to inspire all concerned chemists to devise new strategies that have not yet been explored.

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Abstract: Der Co‐Komplex (Ia) wurde durch Templat‐Kondensation von 2,6‐Diacetylpyridin und 2,9‐Di‐[ l‐methylhydrazino]‐ 1,10‐phenanthrolin in Gegenwart von CoCl2 in Wasser bei Rückflußtemp.

Cited by 3 publications

References 1 publication

Probing the Effect of Axial Ligands on Easy-Plane Anisotropy of Pentagonal-Bipyramidal Cobalt(II) Single-Ion Magnets

Probing the Effect of Axial Ligands on Easy-Plane Anisotropy of Pentagonal-Bipyramidal Cobalt(II) Single-Ion Magnets

A ferromagnetic Ni(ii)–Cr(iii) single-chain magnet based on pentagonal bipyramidal building units

Fifty Shades of Phenanthroline: Synthesis Strategies to Functionalize 1,10-Phenanthroline in All Positions

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