Abstract
The coordination reaction of several rare earth nitrates with cryptand (2.2) in (CH 3) 2CO, CH 3CN, CH 3OH and DMF at 25 ℃ has been studied by means of using conductometric titration. The stability constants and the molar conductivities for the 1∶1 coordination compounds were calculated. Since the complexation is accompanied by solvation of the Ln(Ⅲ) ion in nonaqueous solvents, for lanthanide series, there is more or less variation in stability constants of complexes of rare earth with cryptand (2.2) when atomic numbers increas. The orders of the Λ ML(NO 3) 3 values about the same rare earth crown ether complexes in these nonaqueous solvents are DMF>CH 3OH>CH 3CN>(CH 3) 2CO .
Keywords
Rare earth, Cryptand, Complex, Conductometry, Stability constants
Publication Date
1996-11-28
Online Available Date
1996-11-28
Revised Date
1996-11-28
Received Date
1996-11-28
Recommended Citation
Shichang Liu, Aiju Xu, Qiang Zhang.
A Conductance Study of Complexes of Rare Earth with Cryptand (2.2) in Nonaqueous Solvents[J]. Journal of Electrochemistry,
1996
,
2(4): Article 7.
DOI: 10.61558/2993-074X.3086
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol2/iss4/7
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