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

Yoshinobu Miyazaki; Eishi Hiramatsu; Yoshinori Miura; Hirofumi Sakashita

doi:10.1016/S0277-5387(99)00082-0

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

Yoshinobu Miyazaki, Eishi Hiramatsu, Yoshinori Miura, Hirofumi Sakashita

Center of Advanced Instrumental Analysis

Research output: Contribution to journal › Article › peer-review

5 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 -PHO₃^2- 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 language	English
Pages (from-to)	2041-2045
Number of pages	5
Journal	Polyhedron
Volume	18
Issue number	15
DOIs	https://doi.org/10.1016/S0277-5387(99)00082-0
Publication status	Published - Jun 11 1999

All Science Journal Classification (ASJC) codes

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

Access to Document

10.1016/S0277-5387(99)00082-0

Cite this

@article{4c2961b1b95b4db98883f1cb1fd3416d,

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

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.",

author = "Yoshinobu Miyazaki and Eishi Hiramatsu and Yoshinori Miura and Hirofumi Sakashita",

year = "1999",

month = jun,

day = "11",

doi = "10.1016/S0277-5387(99)00082-0",

language = "English",

volume = "18",

pages = "2041--2045",

journal = "Polyhedron",

issn = "0277-5387",

publisher = "Elsevier Limited",

number = "15",

}

TY - JOUR

T1 - 27Al NMR studies on the complexation of aluminum(III) with phosphinate and phosphite ions

AU - Miyazaki, Yoshinobu

AU - Hiramatsu, Eishi

AU - Miura, Yoshinori

AU - Sakashita, Hirofumi

PY - 1999/6/11

Y1 - 1999/6/11

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0001688251&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0001688251&partnerID=8YFLogxK

U2 - 10.1016/S0277-5387(99)00082-0

DO - 10.1016/S0277-5387(99)00082-0

M3 - Article

AN - SCOPUS:0001688251

SN - 0277-5387

VL - 18

SP - 2041

EP - 2045

JO - Polyhedron

JF - Polyhedron

IS - 15

ER -

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

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this