Chemical Journal of Chinese Universities ›› 1980, Vol. 1 ›› Issue (1): 17-22.

• Preface • Previous Articles     Next Articles

COMPLEX FORMATION OF Th(edta)CHELATE WITH SOME AMINO-ACIDS

Luo Qinhui1, Meng Jingxia2   

  1. 1. Coordination Chemistry Research Institute, Nanjing University;
    2. Department of Chemistry, Nanjing Normal College
  • Received:1979-12-18 Online:1980-06-24 Published:1980-06-24

Abstract: The solutions containing equimolar thorium nitrate,EDTA and an amino-acid (serine,threonine,leucine,or a-amino-isobutyric acid) have been investigated potentiometrically.The results indicate the formation of 1:1:1 mixed ligand chelates.The formation constants logKThYLThY at 30°±0.1℃ and ionic strength μ=0.15 (KNO3) have been calculated.The order of stabilities in terms of the secondary ligand amino-acids,is as follows.a-amino-isobuturic>leucine>threonine=serine.This order agrees with that of the basicity of the amino-acids and can be represented by a linear equation