Abstract
The tetramethylammonium and potassium salts of [1,2-bis(2-oxybenzamidato)benzene]copper(II) abbreviated as [NMe4]2[Cu(hbab)] and K2[Cu(hbab)] were prepared and characterized. The x-ray analysis of the potassium salt, K2[Cu(hbab)]·5DMF, revealed a unique one-dimensional chain structure consisting of {[KO3][K(Cu(hbab)O]}n as the resulting unit, where each K+ ion is surrounded octahedrally by six oxygen atoms and all the oxygen atoms play the role of a bridging group to the K+ ion. The tetramethylammonium salt, [NMe4]2[Cu(hbab)]·H2O, behaves as a 2 : 1 electrolyte in the 10-3 mol dm-3 solutions of methanol, acetonitrile and DMF, while the potassium salt behaves as a 2 : 1 electrolyte in methanol and as a 1 : 1 electrolyte in acetonitrile and DMF. The CuII/III redox potentials of the tetramethylammonium salt in DMF under the presence of 2 equivalent molar of K+, Na+, and Li+ shift to more positive values than those without alkali metal ions, where the magnitude of the positive shift increases with increasing of charge density of alkali metal ion, namely Li+ > Na+ > K-. The charge effect due to ion pair formation between [Cu(hbab)]2- and Na+ or K+ causes the potential shift, while the potential shift in the case of the Li+ ion is brought about by the decrease of donor ability of the phenolic oxygens, besides the charge effect.
| Original language | English |
|---|---|
| Pages (from-to) | 4105-4111 |
| Number of pages | 7 |
| Journal | Polyhedron |
| Volume | 16 |
| Issue number | 23 |
| Publication status | Published - Sep 1997 |
| Externally published | Yes |
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Keywords
- Counter cation effect
- Crystal structure
- Electrochemical property
- Ion pair formation
- Solvent effect
ASJC Scopus subject areas
- Biochemistry
- Inorganic Chemistry
- Physical and Theoretical Chemistry
- Materials Chemistry
Cite this
Crystal structure and electrochemical properties of CuII complexes with 1,2-bis(2-hydroxybenzamido)benzene. / Sunatsuki, Yukinari; Hirata, Ryoko; Motoda, Yuri; Nakamura, Masaaki; Matsumoto, Naohide; Kai, Fumiaki.
In: Polyhedron, Vol. 16, No. 23, 09.1997, p. 4105-4111.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Crystal structure and electrochemical properties of CuII complexes with 1,2-bis(2-hydroxybenzamido)benzene
AU - Sunatsuki, Yukinari
AU - Hirata, Ryoko
AU - Motoda, Yuri
AU - Nakamura, Masaaki
AU - Matsumoto, Naohide
AU - Kai, Fumiaki
PY - 1997/9
Y1 - 1997/9
N2 - The tetramethylammonium and potassium salts of [1,2-bis(2-oxybenzamidato)benzene]copper(II) abbreviated as [NMe4]2[Cu(hbab)] and K2[Cu(hbab)] were prepared and characterized. The x-ray analysis of the potassium salt, K2[Cu(hbab)]·5DMF, revealed a unique one-dimensional chain structure consisting of {[KO3][K(Cu(hbab)O]}n as the resulting unit, where each K+ ion is surrounded octahedrally by six oxygen atoms and all the oxygen atoms play the role of a bridging group to the K+ ion. The tetramethylammonium salt, [NMe4]2[Cu(hbab)]·H2O, behaves as a 2 : 1 electrolyte in the 10-3 mol dm-3 solutions of methanol, acetonitrile and DMF, while the potassium salt behaves as a 2 : 1 electrolyte in methanol and as a 1 : 1 electrolyte in acetonitrile and DMF. The CuII/III redox potentials of the tetramethylammonium salt in DMF under the presence of 2 equivalent molar of K+, Na+, and Li+ shift to more positive values than those without alkali metal ions, where the magnitude of the positive shift increases with increasing of charge density of alkali metal ion, namely Li+ > Na+ > K-. The charge effect due to ion pair formation between [Cu(hbab)]2- and Na+ or K+ causes the potential shift, while the potential shift in the case of the Li+ ion is brought about by the decrease of donor ability of the phenolic oxygens, besides the charge effect.
AB - The tetramethylammonium and potassium salts of [1,2-bis(2-oxybenzamidato)benzene]copper(II) abbreviated as [NMe4]2[Cu(hbab)] and K2[Cu(hbab)] were prepared and characterized. The x-ray analysis of the potassium salt, K2[Cu(hbab)]·5DMF, revealed a unique one-dimensional chain structure consisting of {[KO3][K(Cu(hbab)O]}n as the resulting unit, where each K+ ion is surrounded octahedrally by six oxygen atoms and all the oxygen atoms play the role of a bridging group to the K+ ion. The tetramethylammonium salt, [NMe4]2[Cu(hbab)]·H2O, behaves as a 2 : 1 electrolyte in the 10-3 mol dm-3 solutions of methanol, acetonitrile and DMF, while the potassium salt behaves as a 2 : 1 electrolyte in methanol and as a 1 : 1 electrolyte in acetonitrile and DMF. The CuII/III redox potentials of the tetramethylammonium salt in DMF under the presence of 2 equivalent molar of K+, Na+, and Li+ shift to more positive values than those without alkali metal ions, where the magnitude of the positive shift increases with increasing of charge density of alkali metal ion, namely Li+ > Na+ > K-. The charge effect due to ion pair formation between [Cu(hbab)]2- and Na+ or K+ causes the potential shift, while the potential shift in the case of the Li+ ion is brought about by the decrease of donor ability of the phenolic oxygens, besides the charge effect.
KW - Counter cation effect
KW - Crystal structure
KW - Electrochemical property
KW - Ion pair formation
KW - Solvent effect
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UR - http://www.scopus.com/inward/citedby.url?scp=0039462104&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0039462104
VL - 16
SP - 4105
EP - 4111
JO - Polyhedron
JF - Polyhedron
SN - 0277-5387
IS - 23
ER -