27Al NMR studies on the complexation of aluminum(III) with phosphinate and phosphite ions

Yoshinobu Miyazaki, Eishi Hiramatsu, Yoshinori Miura, Hirofumi Sakashita

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The complex formation of aluminum(III) with phosphinate and phosphite ions in acidic solutions (pH 1-3) has been investigated by 27Al NMR spectroscopy. The formation of a 2:2 complex was established in addition to ordinary stepwise complexes in both Al3+-PH2O2- and -PHO32- systems. Formation constants of these complexes formed in both systems, and thermodynamic quantities for the complexation in the Al3+-PH2O2- system were determined at an ionic strength of 1.0 moldm-3 NaClO4. The stepwise complexation up to 1:3 becomes more exothermic and less entropy-productive in a regular manner. Both ΔH° and ΔS° values for the 2:2 complexation are quite large and positive due to the dimerization.

Original languageEnglish
Pages (from-to)2041-2045
Number of pages5
JournalPolyhedron
Volume18
Issue number15
DOIs
Publication statusPublished - Jun 11 1999

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Phosphites
Complexation
Aluminum
Nuclear magnetic resonance
Ions
aluminum
nuclear magnetic resonance
ions
Dimerization
dimerization
Ionic strength
Nuclear magnetic resonance spectroscopy
Entropy
Thermodynamics
entropy
thermodynamics
spectroscopy

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

27Al NMR studies on the complexation of aluminum(III) with phosphinate and phosphite ions. / Miyazaki, Yoshinobu; Hiramatsu, Eishi; Miura, Yoshinori; Sakashita, Hirofumi.

In: Polyhedron, Vol. 18, No. 15, 11.06.1999, p. 2041-2045.

Research output: Contribution to journalArticle

Miyazaki, Yoshinobu ; Hiramatsu, Eishi ; Miura, Yoshinori ; Sakashita, Hirofumi. / 27Al NMR studies on the complexation of aluminum(III) with phosphinate and phosphite ions. In: Polyhedron. 1999 ; Vol. 18, No. 15. pp. 2041-2045.
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