Acta Phys. -Chim. Sin. ›› 2001, Vol. 17 ›› Issue (10): 956-960.doi: 10.3866/PKU.WHXB20011019
• Note • Previous Articles
Wu Xin-Ming;Liu Yi;Qu Song-Sheng;Zhang Da-Shun;Liu Ping;Wang Chun-Yan
Received:
Revised:
Published:
Contact:
Abstract: Crystals of two complex compounds of rareearth perchlorate with Lproline,[RE2(LPro)6(H2O)4](ClO4)6(RE=Pr,Er),were synthesized.Their structures were characterized using TG,DTA,chemical analytic method and comparing with literatures,and the purity is determined as 99.24% and 98.20%,respectively.For the calculation of chemical reaction heat,solution heat of the [2RE(NO3)3•6H2O+6LPro+6NaClO4•H2O] and the {[RE2(LPro)6(H2O)4](ClO4)6+6NaNO3} were firstly measured in 2 mol•L1 HCl solvent with an isoperibel reaction calorimeter,respectively.The standard enthalpy of formation of the two crystals were calculated by chemical reaction heat and a designed thermochemical cycle at 298.15 K.The following reaction enthalpy and standard enthalpy of formation were obtained: RE=Pr:ΔrHm=-63.904 kJ•mol-1;RE=Er:ΔrHm=- 91.017 kJ•mol-1; ΔfHm([Pr2(LPro)6(H2O)4](ClO4)6,s,298.15 K)=-6 594.78 kJ•mol-1; ΔfHm([Er2(LPro)6(H2O)4](ClO4)6,s,298.15 K)=-6 532.87 kJ•mol-1.
Key words: Perchlorate, L-Proline, [RE2(L-Pro)6(H2O)4](ClO4)6(RE=Pr,Er)
Wu Xin-Ming;Liu Yi;Qu Song-Sheng;Zhang Da-Shun;Liu Ping;Wang Chun-Yan. Determination of Standard Enthalpies of Formation of Rare Earth (RE=Pr,Er) with L-Proline [RE2(L-Pro)6(H2O)4](ClO4)6 Complexes[J].Acta Phys. -Chim. Sin., 2001, 17(10): 956-960.
0 /
Add to citation manager EndNote|Reference Manager|ProCite|BibTeX|RefWorks
URL: http://www.whxb.pku.edu.cn/EN/10.3866/PKU.WHXB20011019
http://www.whxb.pku.edu.cn/EN/Y2001/V17/I10/956
Cited