A direct nitrogen-15 NMR study of cerium(III)-nitrate complexes in aqueous solvent mixtures

Fratiello, Anthony; Kubo-Anderson, V.; Azimi, S.; Marinez, Eric R.; Matejka, Dennis; Perrigan, R. D.; Yao, B.

doi:10.1007/bf00650759

Cited by 18 publications

(3 citation statements)

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“…The 15 N NMR spectra of 2- 15 N and 6- 15 N showed singlets with 20−25 Hz half-height line widths 20 at 871 and 1001 ppm, respectively. To our knowledge, the only other reports of 15 N NMR data on cerium complexes are those reported for solutions of Ce 3+ in the presence of ( 15 NO 3 ) 1- and ( 15 NCS) 1- counter ions. In those studies, the 15 NO 3 1- ion exhibited a shift of between −40 and −120 ppm compared to the sodium salt, whereas the ( 15 NCS) 1- ion, which can bind directly via nitrogen to Ce 3+ , was shifted between 450 and 550 ppm from the resonances for the sodium salt.…”

Section: Resultsmentioning

confidence: 98%

Synthesis, Structure, and ¹⁵N NMR Studies of Paramagnetic Lanthanide Complexes Obtained by Reduction of Dinitrogen

Evans

Rego

2006

Inorg. Chem.

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The recently discovered LnZ3/M and LnZ2Z'/M methods of reduction (Ln = lanthanide; M = alkali metal; Z, Z' = monoanionic ligands that allow these combinations to generate "LnZ2" reactivity) have been applied to provide the first crystallographically characterized dinitrogen complexes of cerium, [C5Me5)2(THF)Ce]2(mu-eta2.eta2-N2) and [(C5Me4H)2(THF)Ce]2(mu-eta2.eta2-N2), so that the utility of 15N NMR spectroscopy with paramagnetic lanthanides could be determined. [(C5Me5)2(THF)Pr]2(mu-eta2.eta2-N2) and [(C5Me4H)2(THF)Pr]2(mu-eta2.eta2-N2) were also synthesized, crystallographically characterized, and studied by 15N NMR methods. The data were compared to those of [(C5Me5)2Sm]2(mu-eta2.eta2-N2). [(C5Me5)2(THF)Ce]2(mu-eta2.eta2-N2) and [(C5Me5)2(THF)Pr]2(mu-eta2.eta2-N2) are unlike their (C5Me4H)1- analogs in that the solvating THF molecules are cis rather than trans. Structural information on precursors, (C5Me4H)3Ce, (C5Me4H)3Pr, and the oxidation product [(C5Me5)2Ce]2(mu-O) is also presented.

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Section: Resultsmentioning

confidence: 98%

Synthesis, Structure, and ¹⁵N NMR Studies of Paramagnetic Lanthanide Complexes Obtained by Reduction of Dinitrogen

Evans

Rego

2006

Inorg. Chem.

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“…As pointed out to us privately by Antonio, the larger An–NO 3 – stability constants 62 may be responsible for Cm III , Am III , and Ac III preference for η 2 -NO 3 – binding. 59 , 63 …”

Section: Resultsmentioning

confidence: 99%

The coordination chemistry of Cm^III, Am^III, and Ac^IIIin nitrate solutions: an actinide L₃-edge EXAFS study

et al. 2018

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“…In this contribution results obtained for chromium nitrate and cerium chloride solutions are discussed. Aqueous solutions of the salts here mentioned have been discussed by several authors [26,27,[56][57][58][59][60][61][62][63][64][65][66][67][68][69][70].…”

Section: Introductionmentioning

confidence: 99%

The structure of concentrated aqueous solutions of chromium nitrate and cerium chloride studied by X-ray diffraction and Raman spectroscopy

Cabaço

Marques

Gaspar

et al. 2007

Journal of Molecular Liquids

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Concentrated aqueous solutions of chromium nitrate and cerium chloride were investigated by X-ray diffraction and Raman spectroscopy. The X-ray diffraction patterns of two sets of solutions (1.60 up to 2.48 mol dm − 3 for chromium nitrate and 0.98 up to 2.81 mol dm − 3 for cerium chloride) display an intense maximum, prepeak, in the angular region about Q 0 ∼ 0.9 Å − 1 (Q = 4 π sin θ / λ, θ being the diffracting angle). The value of Q 0 corresponding to these maxima is proportional to the power 1/3 of the molar concentration. The proportionality coefficient has the value that should be observed for a close packing (fcc network) if assumed for cations. This study demonstrates, once more, the existence of an intermediate range order (up to ∼10 Å) in very concentrated aqueous solutions of salts constituted by small ions of different valences, range order previously reported by these authors in many articles. Raman experiments are in consonance with X-ray diffraction results.

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A direct nitrogen-15 NMR study of cerium(III)-nitrate complexes in aqueous solvent mixtures

Cited by 18 publications

References 36 publications

Synthesis, Structure, and ¹⁵N NMR Studies of Paramagnetic Lanthanide Complexes Obtained by Reduction of Dinitrogen

Synthesis, Structure, and ¹⁵N NMR Studies of Paramagnetic Lanthanide Complexes Obtained by Reduction of Dinitrogen

The coordination chemistry of Cm^III, Am^III, and Ac^IIIin nitrate solutions: an actinide L₃-edge EXAFS study

The structure of concentrated aqueous solutions of chromium nitrate and cerium chloride studied by X-ray diffraction and Raman spectroscopy

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A direct nitrogen-15 NMR study of cerium(III)-nitrate complexes in aqueous solvent mixtures

Cited by 18 publications

References 36 publications

Synthesis, Structure, and 15N NMR Studies of Paramagnetic Lanthanide Complexes Obtained by Reduction of Dinitrogen

Synthesis, Structure, and 15N NMR Studies of Paramagnetic Lanthanide Complexes Obtained by Reduction of Dinitrogen

The coordination chemistry of CmIII, AmIII, and AcIIIin nitrate solutions: an actinide L3-edge EXAFS study

The structure of concentrated aqueous solutions of chromium nitrate and cerium chloride studied by X-ray diffraction and Raman spectroscopy

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Synthesis, Structure, and ¹⁵N NMR Studies of Paramagnetic Lanthanide Complexes Obtained by Reduction of Dinitrogen

Synthesis, Structure, and ¹⁵N NMR Studies of Paramagnetic Lanthanide Complexes Obtained by Reduction of Dinitrogen

The coordination chemistry of Cm^III, Am^III, and Ac^IIIin nitrate solutions: an actinide L₃-edge EXAFS study