Standard Enthalpies of Formation of Solid Complexes of Lanthanide Nitrates with Alanine

来源 :Journal of Rare Earths | 被引量 : 0次 | 上传用户:redhatping
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The combustion energies of fourteen solid complexes of lanthanide nitrate with alanine were determined. The standard enthalpies of combustion, Δ c,coor(s) H °, and standard enthalpies of formation, Δ f,coor(s) H °, were calculated for these complexes. The relationship of Δ c,coor(s) H ° and Δ f,coor(s) H ° with the atomic numbers of the elements in the lanthanide series were examined. The results show that a certain amount of covalence is present in the chemical bond between the lanthanide cations and alanine. The standard enerhal of fourteen solid complexes of lanthanide nitrate with alanine were determined. The standard enthalpies of combustion, Δ c, coor (s) H °, and standard enthalpies of formation, Δ f, coor (s) H °, were calculated for these complexes. The relationship of Δc, coor (s) H ° and Δ f, coor (s) H ° with the atomic numbers of the elements in the lanthanide series were examined. The results show that a certain amount of covalence is present in the chemical bond between the lanthanide cations and alanine.
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