(1,1,1,5,5,5-Hexafluoro-2,4-pentanedionato-O,O')(1,4,7,10,13-pentaoxapentadecane-κ5O)sodium

Farrugia, Louis J.; Watson, I. M.

doi:10.1107/s0108270198013031

Cited by 7 publications

(8 citation statements)

References 3 publications

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“…The sodium cation is seven-coordinate with five Na-O and two Na-N bonds; the amide occupies one coordination hemisphere and the 15C5 the other. The Na-O bond lengths span the range 2.4874(9)-2.5321(9) Å, within the ranges reported for the -diketonate complex [Na{HC[C(O)CF 3 ] 2 }(15C5)] 11 and for the related complex [Na(2-S-Py)(15C5)]. 12 The sodium cation thus lies 1.008 Å above the mean oxygen plane of the crown.…”

Section: Solid State Structuressupporting

confidence: 69%

“…A number of homometallic alkali metal complexes of 2phenylamidopyridine have previously been reported, 7 revealing a variety of coordination modes for the anion, and in general aminopyridine complexes have found widespread applications as supporting ligands for main group (s and p block), lanthanide and transition metals. 8 Here we report the synthesis and characterisation of twelve new heavier alkali metal complexes of 2-phenylamidopyridine with matched and mismatched crown ethers (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12), which exhibit a remarkable degree of structural diversity.…”

Section: Introductionmentioning

confidence: 99%

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Heavier alkali metal complexes of 2-phenylamidopyridine: An X-ray crystallographic and theoretical study of a structurally diverse series of crown ether adducts

2004

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Complexes of the anion of the secondary amine 2-phenylaminopyridine (LH) with the heavier alkali metals Na-Cs have been prepared in the presence of various macrocyclic polyether crowns [12-crown-4 (12C4), 15-crown-5 (15C5), and 18-crown-6 (18C6)], which coordinate to the metal ions in all cases. Depending on the combination of alkali metal and crown, the products include separated ion pairs [(crown)(2)M](+)L(-)(12C4/Na, 15C5/K, 15C5/Rb, 15C5/Cs) and contact-ion-pair neutral molecules [(crown)ML](15C5/Na, 18C6/Na, 18C6/K, 18C6/Rb) in which L(-) acts as a bidentate ligand. [((12C4)KL)(2)] is a dimer in which the amido and pyridine N atoms of two ligands bridge the metal ions, while [((18C6)KL(2)K)([infinity])] is a chain polymer with crown O and pyridyl N atoms acting as bridges in corner-sharing KOKN four-membered rings and may be regarded as a potassium potassate complex. [((18C6)Cs(2)L(2))([infinity])] is also polymeric, with a basic arrangement like that of [((12C4)KL)(2)], but with each 18C6 ligand mu-kappa6:kappa6 to two metal centres, generating the polymer. Although most of the [(crown)(2)M](+) sandwich cations have essentially parallel crown ligands, [(12C4)(2)Rb](+) is markedly bent, both in the complex incorporating THF as an additional ligand and in the THF-free complex, where two of these cations form a centrosymmetric dimer through two bridging oxygen atoms; DFT calculations indicate that the bending is inherent, thus enabling the coordination by an extra oxygen atom rather than being a consequence of this coordination. Attempts to isolate the caesium 12C4 derivative were unsuccessful. The compounds have been characterized by NMR spectroscopy, CHN microanalysis and, in most cases, X-ray crystallography.

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Section: Solid State Structuressupporting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Heavier alkali metal complexes of 2-phenylamidopyridine: An X-ray crystallographic and theoretical study of a structurally diverse series of crown ether adducts

2004

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“…Similarly, homoleptic hexafluoroacetylacetonates of tri-and higher-valent transition metals are also monomeric with the β-diketonate ligand being coordinated to the metal centers in a bidentate manner. As expected, the trivalent complexes [M(β-dik F ) 3 ] (M = V, 314 Cr, 315 Mn, 316 326 where sodium atom is 7-coordinated in a distorted pentagonal bipyramidal geometry, the potassium complex [(18-crown-6)K(η 2 -hfac)] n exists in the solid state as a linear polymeric chain via F···K interactions [2.934(7)− 3.081(6) Å]. 121 The use of intermolecular Lewis bases such as cyclic and acyclic ethers produces thermally unstable compounds for nonfluorinated β-diketones due to the weak interaction between the ether and the metal center.…”

Section: Metal Complexes With Fluorinated β-Diketonessupporting

confidence: 50%

Metal–Organic Derivatives with Fluorinated Ligands as Precursors for Inorganic Nanomaterials

2015

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“…The windows program WinGX was used as the interface for the solution and refinement of the model. 19 The data were first reduced and corrected for absorption using the psi-scans and then solved using the program SIR2004. 20 The model was refined using SHELXL97.…”

Section: Methodsmentioning

confidence: 99%

Color Tuning of Polyfluorene Emission with BODIPY Monomers

et al. 2009

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Three fluorescent conjugated copolymers, comprised of alternating fluorene and BODIPY units in the main chain, have been prepared by palladium-catalyzed Suzuki polymerization of 9,9-dihexylfluorene-2,7-diboronic acid with each of three different 2,6-diiodo-substituted BODIPY monomers. The copolymers were characterized using FT-IR spectroscopy, UV-vis spectroscopy, photoluminescence (PL), and molecular weight studies. Low-band gap BODIPY comonomers are effective in expanding the emission wavelength to the orange region because of significant extension of π-conjugation and have significantly enhanced fluorescent intensity with fluorescent quantum yield of up to 85% in methylene chloride solution. The copolymers show absorption maxima between 547 and 557 nm and emission maxima between 585 and 588 nm in methylene chloride solutions. The copolymers possess high molecular weight, good solubility and readily dissolve in common organic solvents such as THF, CH 2 Cl 2 , CHCl 3 , and toluene. The copolymers display sensitive fluorescent responses to fluoride and cyanide anions through their multivalent interactions while they do not respond to chloride, bromide, and iodide anions.

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(1,1,1,5,5,5-Hexafluoro-2,4-pentanedionato-O,O')(1,4,7,10,13-pentaoxapentadecane-κ⁵O)sodium

Cited by 7 publications

References 3 publications

Heavier alkali metal complexes of 2-phenylamidopyridine: An X-ray crystallographic and theoretical study of a structurally diverse series of crown ether adducts

Heavier alkali metal complexes of 2-phenylamidopyridine: An X-ray crystallographic and theoretical study of a structurally diverse series of crown ether adducts

Metal–Organic Derivatives with Fluorinated Ligands as Precursors for Inorganic Nanomaterials

Color Tuning of Polyfluorene Emission with BODIPY Monomers

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