Extraction Behavior of Di-μ-oxo-bis[oxomolybdenum(V)] with 2-Methyl-5-octyloxymethyl-8-quinolinol

Access this Article

Search this Article

Author(s)

    • FENG Yuqi
    • Department of Chemistry, Faculty of Science, Ibaraki University
    • IMURA Hisanori
    • Department of Chemistry, Faculty of Science, Ibaraki University

Abstract

Binuclear oxomolybdenum(V), Mo<sub>2</sub>O<sub>4</sub><sup>2+</sup>, was quantitatively extracted with 0.01 mol dm<sup>−3</sup> 2-methyl-5-octyloxymethyl-8-quinolinol (HMO<sub>8</sub>Q) in chloroform at pH 2.3 and isobutyl methyl ketone at pH 1.0—3.9. To elucidate the extraction equilibrium, the effect of the pH as well as the HMO<sub>8</sub>Q and molybdenum(V) concentration on the distribution ratio of Mo<sub>2</sub>O<sub>4</sub><sup>2+</sup> was studied. The extracted complex was found to be Mo<sub>2</sub>O<sub>4</sub>(MO<sub>8</sub>Q)<sub>2</sub>; the extraction constants (<i>K</i><sub>ex</sub>) were determined to be 10<sup>0.15</sup> and 10<sup>1.57</sup> in benzene and chloroform, respectively. These values were lower than <i>K</i><sub>ex</sub> = 10<sup>3.26</sup> obtained in the Mo<sub>2</sub>O<sub>4</sub><sup>2+</sup>-5-octyloxymethyl-8-quinolinol–chloroform system, suggesting a steric effect of the methyl group at the 2-position. In the presence of trioctylphosphine oxide (TOPO) a great enhancement of molybdenum(V) extraction was found and could be ascribed to the formation of an adduct, Mo<sub>2</sub>O<sub>4</sub>(MO<sub>8</sub>Q)<sub>2</sub>(TOPO).

Journal

  • Bulletin of the Chemical Society of Japan

    Bulletin of the Chemical Society of Japan 68(2), 604-609, 1995-02-15

    The Chemical Society of Japan

References:  15

Codes

  • NII Article ID (NAID)
    10008886520
  • NII NACSIS-CAT ID (NCID)
    AA00580132
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    00092673
  • Data Source
    CJP  J-STAGE 
Page Top