Complexation de l'ion uranyle par des ligands macrocycliques du type ether-couronne ou cryptand en milieu carbonate de propylène

Fux, P.; Lagrange, Janine; Lagrange, Philippe

doi:10.1051/jcp/1984810321

Cited by 7 publications

(1 citation statement)

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“…Complexation of the dioxouranium by macrocycles, particularly by crown ethers, has been widely studied (Folcher, Charpin, Costes, Keller & de Villardi, 1979;Fux, Lagrange & Lagrange, 1984;Brighli, Fux, Lagrange & Lagrange, 1985). Of particular interest has been the inclusion of the uranyl ion in macrocycles; however, the majority of structural studies concern complexes in which the crown ligand is linked to the uranyl ion via hydrogen bonds (Rogers, Bond, Hippie, Rollins & Henry, 1991;Gutberlet, Dreissig, Luger, Bechthold, Maung & Knochel, 1989) and few structural studies show a direct uranyl-crown coordination (Navaza, Villain & Charpin, 1984;Dejean, Charpin, Folcher, Rigny, Navaza & Tsoucaris, 1987;Deshayes, Keller, Lance, Navaza, Nierlich & Vigner, 1993).…”

Section: Commentmentioning

confidence: 99%

Inclusion complex between uranyl and an azacrown; structure of [UO2(18-azacrown-6)]2+.2CF3SO3−

Nierlich¹,

Sabattié²,

Keller³

et al. 1994

Acta Crystallogr C

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Section: Commentmentioning

confidence: 99%

Inclusion complex between uranyl and an azacrown; structure of [UO2(18-azacrown-6)]2+.2CF3SO3−

Nierlich¹,

Sabattié²,

Keller³

et al. 1994

Acta Crystallogr C

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²³Na nuclear magnetic resonance study of the complexation of sodium tetraphenylborate by [5,5]‐dibenzo‐30‐crown‐10 in nitromethane, acetonitrile, acetone and pyridine

Briere

Graves

Rana

et al. 1990

J of Physical Organic Chem

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The nature of the (Na–DB30C10)+ complex has been studied by 23Na NMR in four non‐aqueous solvents: nitromethane (NM), acetonitrile (AN), acetone (AC) and pyridine (PY). The equilibrium constant of formation (Kf) of (Na‐DB30C10)+ in AC, AN and PY was determined at 300 K: log Kf = 3·9 ± 0·3, 3·4 ± 0·5 and 3·0 ± 0·1, respectively. In cases such as in pyridine, where exact values of the rate constants for the chemical exchange could not be calculated, limiting values were determined giving k−1 (the rate constant for complex dissociation) > 6·6 × 10−4 s−1 and kc (the rate constant for the formation of the complex) > 5 × 107 l mol−1 s−1. Evidence was found for the formation of a 2 : 1 (Na2–DB30C10)+2 complex in nitromethane. It has been previously shown that for (Na–DB24C8)+ the first coordination sphere of Na+ is exclusively filled by the oxygens of the crown ether, whereas for (Na–DB18C6)+ there is participation of at least one solvent molecule. The first coordination sphere of Na+ in (Na–DB30C10)+ consists of one or several molecules of solvent in addition to a number of oxygens from the crown ether. The soft wrapping of the Na+ by DB30C10 is in constrast with the hard wrapping of Na+ by DB24C8 and of K+ by DB30C10.

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Selective complexation of UO 2 2+ by the calix[6]arene6? anion: Structure and hydration studied by molecular dynamics simulations

Guilbaud

Wipff

1993

J Incl Phenom Macrocycl Chem

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Complexation de l'ion uranyle par des ligands macrocycliques du type ether-couronne ou cryptand en milieu carbonate de propylène

Cited by 7 publications

References 0 publications

Inclusion complex between uranyl and an azacrown; structure of [UO2(18-azacrown-6)]2+.2CF3SO3−

Inclusion complex between uranyl and an azacrown; structure of [UO2(18-azacrown-6)]2+.2CF3SO3−

²³Na nuclear magnetic resonance study of the complexation of sodium tetraphenylborate by [5,5]‐dibenzo‐30‐crown‐10 in nitromethane, acetonitrile, acetone and pyridine

Selective complexation of UO 2 2+ by the calix[6]arene6? anion: Structure and hydration studied by molecular dynamics simulations

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Complexation de l'ion uranyle par des ligands macrocycliques du type ether-couronne ou cryptand en milieu carbonate de propylène

Cited by 7 publications

References 0 publications

Inclusion complex between uranyl and an azacrown; structure of [UO2(18-azacrown-6)]2+.2CF3SO3−

Inclusion complex between uranyl and an azacrown; structure of [UO2(18-azacrown-6)]2+.2CF3SO3−

23Na nuclear magnetic resonance study of the complexation of sodium tetraphenylborate by [5,5]‐dibenzo‐30‐crown‐10 in nitromethane, acetonitrile, acetone and pyridine

Selective complexation of UO 2 2+ by the calix[6]arene6? anion: Structure and hydration studied by molecular dynamics simulations

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²³Na nuclear magnetic resonance study of the complexation of sodium tetraphenylborate by [5,5]‐dibenzo‐30‐crown‐10 in nitromethane, acetonitrile, acetone and pyridine