The crystal structure of some lanthanide oxalate decahydrates, Ln2(C2O4)3·10H2O, with Ln = La, Ce, Pr, and Nd

Ollendorff, W.; Weigel, F.

doi:10.1016/0020-1650(69)80196-0

Cited by 119 publications

(63 citation statements)

References 7 publications

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“…The net result is an increase in the effective value of the ionization potential term I r applicable in (i). The implicit variable oxalate bonding has been confirmed by the X-ray structures of Ln2(C20,)3.10H20 [58][59][60] and LaC20,C1-3H20 [61].…”

Section: J~o F~ ~ Dot = A/fl ~O Exp (-E/rt) Dtmentioning

confidence: 81%

Activation energy of thermal decomposition of fully dehydrated NdC2O4Cl·3H2O to NdOCl

Mulokozi

Zuru

1989

Journal of Thermal Analysis

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An activation energy Ea = 195 kJ mol-1 has been determined for the thermal decomposition of NdC204C1 to NdOCI with simultaneous expulsion of CO and CO2. As compared with the value (127 kJ mo1-1) predicted by the Kahwa-Mulokozi empirical expression (i) + for Ln2(C204)3 (Ln = light lanthanide), the presence of C1-in the coordination polyhedron appreciably raises the activation energy, which is consistent with a corresponding increase in the covalent strength of the Ln-oxalate bond. The same conclusion regarding the strength of this bond is drawn from a study of the infrared spectrum.Mechanistically, the breaking of the Ln-oxalate bond is suggested to occur in the kinetic ratedetermining step.The thermal decomposition behaviour of the lanthanide oxalates and their derivatives LnC204X (X = C1 or Br) has been widely investigated [1-37]. The course of the reaction displays pronounced sensitivity to the nature of the bonding, not only with regard to the metal-oxalate interaction, but also as concerns the donor property of X. Those observations are explained in a neat theoretical framework. decomposition of oxalate can proceed via three alternativeThe thermal pathways:

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Section: J~o F~ ~ Dot = A/fl ~O Exp (-E/rt) Dtmentioning

confidence: 81%

Activation energy of thermal decomposition of fully dehydrated NdC2O4Cl·3H2O to NdOCl

Mulokozi

Zuru

1989

Journal of Thermal Analysis

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“…For 0.21 x Nd 0.84, the prepared oxalates were always polyphased. XRD revealed the presence of two to three crystalline structures in this range [43] and monoclinic P2 1 /c, which corresponds to the most common structure of Nd(C 2 O 4 ) 1.5 Á5H 2 O [60][61][62]. Finally, for x Nd = 0.97 and x Nd = 1, the monoclinic P2 1 /c structure was the only one stabilized.…”

Section: Structural Characterization Of the Oxalates Precursorsmentioning

confidence: 86%

Synthesis and characterization of Th1−xLnxO2−x/2 mixed-oxides

Horlait

Clavier

Cavalier

et al. 2012

Materials Research Bulletin

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“…lanthanide oxalate where this number ranges from 9.5 to 1 Ϫ z 10.5 due to disordered water molecules (41,43,44). Ce(C 2 O 4 )(HCO 2 ) (2).…”

Section: Symmetry Operatorsmentioning

confidence: 99%

Two New Families of Lanthanide Mixed-Ligand Complexes, Oxalate–Carbonate and Oxalate–Formate: Synthesis and Structure of [Ce(H2O)]2(C2O4)2(CO3)·2.5 H2O and Ce(C2O4)(HCO2)

Roméro

Mosset

Trombe

1996

Journal of Solid State Chemistry

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The crystal structure of some lanthanide oxalate decahydrates, Ln2(C2O4)3·10H2O, with Ln = La, Ce, Pr, and Nd

Cited by 119 publications

References 7 publications

Activation energy of thermal decomposition of fully dehydrated NdC2O4Cl·3H2O to NdOCl

Activation energy of thermal decomposition of fully dehydrated NdC2O4Cl·3H2O to NdOCl

Synthesis and characterization of Th1−xLnxO2−x/2 mixed-oxides

Two New Families of Lanthanide Mixed-Ligand Complexes, Oxalate–Carbonate and Oxalate–Formate: Synthesis and Structure of [Ce(H2O)]2(C2O4)2(CO3)·2.5 H2O and Ce(C2O4)(HCO2)

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