Coordination Reaction of Alanine with Neodymium(III) and Erbium(III) Nitrate. Thermochemical study |
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| Authors: | Wenshen C Yi L Chuanpei Z Songsheng Q |
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| Institution: | (1) Department of Chemistry, College of Chemistry and Environmental Sciences, Wuhan University, Wuhan, 430072, P.R. China;(2) Hubei College of Education, Wuhan, 430060, P.R. China;(3) Hubei College of Pharmacy and Clinical Laboratory Science, Wuhan, 430064, P.R. China |
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| Abstract: | The solid-state coordination reaction: Nd(NO3)3·6H2O(s)+4Ala(s) → Nd(Ala)4(NO3)3·H2O(s)+5H2O(l) and Er(NO3)3·6H2O(s)+4Ala(s) → Er(Ala)4(NO3)3·H2O(s)+5H2O(l) have been studied by classical solution calorimetry. The molar dissolution enthalpies of the reactants and the products
in 2 mol L–1 HCl solvent of
these two solid-solid coordination reactions have been measured using a calorimeter. From the results and other auxiliary
quantities, the standard molar formation enthalpies of Nd(Ala)4(NO3)3·H2O, s, 298.2 K] andEr(Ala)4(NO3)3·H2O, s,298.2 K] at 298.2 K have been determined to be Δf
H
m
0 Nd(Ala)4(NO3)3·H2O,s, 298.2 K]=–3867.2 kJ mol–1, and Δf
H
m
0 Er(Ala)4(NO3)3·H2O, s, 298.2 K]=–3821.5 kJ mol–1.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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| Keywords: | alanine erbium nitrate isoperibol calorimetry neodymium nitrate standard molar formation enthalpy |
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