作者:O. V. Koval'chukova、N. E. Kuz'mina、S. B. Strashnova、K. K. Palkina、N. I. Mordovina、B. E. Zaitsev、S. V. Nikitin
DOI:10.1023/a:1022342202587
日期:——
Complexes of scandium, yttrium, and lanthanum nitrates with 3-chloro-9-hydroxy-2,4-dimethylpyrido[1,2-a]pyrimidinium perchlorate ((HLClO4)-Cl-1) and 9-hydroxy-2,4-dimethylpyrido[1,2-a]pyrimidinium perchlorate ((HLClO4)-Cl-2) were obtained. Their composition was formulated as Sc(LClO4)(2)(NO3) and M(LClO4)(2)(NO3)(2) (L = L-1 or L-2; M =Y or La); structures for the complexes obtained were proposed. The crystal and molecular structure of (HLClO4)-Cl-1 was determined. Dissociation and complexation of (HLClO4)-Cl-1 and (HLClO4)-Cl-2 in aqueous ethanol were studied using the spectroscopic method. Ligand dissociation and complexation constants were calculated. It was shown that a chlorine-containing organic ligand only slightly changes the composition and stability of the metal complexes.
Palomino, M. I. Leon; Zaitsev, B. E.; Gridasova, R. K., Russian Journal of Inorganic Chemistry, <hi>1990</hi>, vol. 35, p. 1153 - 1156
作者:Palomino, M. I. Leon、Zaitsev, B. E.、Gridasova, R. K.、Gashev, S. B.、Dolganev, V. P.、et al.
DOI:——
日期:——
Betaines from new heterocyclic phenols : 9-oxido-pyrido[1,2-a]pyrimidin-5-ium and derivatives.
作者:F. Dennin、D. Blondeau、H. Sliwa
DOI:10.1016/s0040-4039(00)92155-5
日期:1991.1
9-oxido-pyrido[1,2-a]pyrimidin-5-ium and its 2,4-dimethyl derivative were obtained from the corresponding hydroxy compounds by ion exchange on Amberlite IRA 401 S.
通过在Amberlite IRA 401 S上进行离子交换,从相应的羟基化合物中获得9-氧化-吡啶并[1,2-a]嘧啶-5-基及其2,4-二甲基衍生物。
Synthesis, electronic structure, and absorption spectra of 9-hydroxypyrido[1,2-a]-pyrimidinium derivatives
作者:M. I. Leon Palomino、B. E. Zaitsev、S. B. Gashev、S. V. Nikitin、L. D. Smirnov、O. V. Koval'chukova