Abstract
The orange [RuII(H3L)](ClO4) 2·3H2O (1) complex was synthesized from cis-[RuCl2(dmso)4] and H3L, where H 3L (tris{[2-{(imidazol-4-yl)methylidene}amino]ethyl}amine) is a tripodal ligand obtained by condensation of tris(2-aminoethyl)amine and 4-formylimidazole in a 1:3 mol ratio. The X-ray crystal structure analysis revealed that the complex has an octahedral structure coordinated by three imidazole nitrogen atoms and three Schiff base (imine) nitrogen atoms. The uncoordinated NH groups of the imidazole moieties of 1 are easily deprotonated by the action of a base. The effect of deprotonation on the Ru III/RuII redox potential was studied by cyclic voltammetry in methanol containing 0.1 M LiClO4. Complete deprotonation shifts the RuII/RuII potential to a much more negative value from -0.18 to -0.72 V vs. Ag/Ag+, making it easier to oxidize. The bluish-purple RuIII complex, [RuIII(H3L)] 3+, was formed by controlled-potential electrolysis of 1, and the electronic spectrum is reported.
| Original language | English |
|---|---|
| Pages (from-to) | 3236-3243 |
| Number of pages | 8 |
| Journal | European Journal of Inorganic Chemistry |
| Issue number | 16 |
| DOIs | |
| Publication status | Published - Aug 21 2006 |
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Keywords
- Chirality
- N ligands
- Redox chemistry
- Ruthenium
- Schiff bases
- Tripodal ligands
ASJC Scopus subject areas
- Inorganic Chemistry
Cite this
A ruthenium(II) complex with a tripodal ligand containing three imidazole groups. / Yamaguchi, Tomoka; Harada, Kazutoshi; Sunatsuki, Yukinari; Kojima, Masaaki; Nakajima, Kiyohiko; Matsumoto, Naohide.
In: European Journal of Inorganic Chemistry, No. 16, 21.08.2006, p. 3236-3243.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A ruthenium(II) complex with a tripodal ligand containing three imidazole groups
AU - Yamaguchi, Tomoka
AU - Harada, Kazutoshi
AU - Sunatsuki, Yukinari
AU - Kojima, Masaaki
AU - Nakajima, Kiyohiko
AU - Matsumoto, Naohide
PY - 2006/8/21
Y1 - 2006/8/21
N2 - The orange [RuII(H3L)](ClO4) 2·3H2O (1) complex was synthesized from cis-[RuCl2(dmso)4] and H3L, where H 3L (tris{[2-{(imidazol-4-yl)methylidene}amino]ethyl}amine) is a tripodal ligand obtained by condensation of tris(2-aminoethyl)amine and 4-formylimidazole in a 1:3 mol ratio. The X-ray crystal structure analysis revealed that the complex has an octahedral structure coordinated by three imidazole nitrogen atoms and three Schiff base (imine) nitrogen atoms. The uncoordinated NH groups of the imidazole moieties of 1 are easily deprotonated by the action of a base. The effect of deprotonation on the Ru III/RuII redox potential was studied by cyclic voltammetry in methanol containing 0.1 M LiClO4. Complete deprotonation shifts the RuII/RuII potential to a much more negative value from -0.18 to -0.72 V vs. Ag/Ag+, making it easier to oxidize. The bluish-purple RuIII complex, [RuIII(H3L)] 3+, was formed by controlled-potential electrolysis of 1, and the electronic spectrum is reported.
AB - The orange [RuII(H3L)](ClO4) 2·3H2O (1) complex was synthesized from cis-[RuCl2(dmso)4] and H3L, where H 3L (tris{[2-{(imidazol-4-yl)methylidene}amino]ethyl}amine) is a tripodal ligand obtained by condensation of tris(2-aminoethyl)amine and 4-formylimidazole in a 1:3 mol ratio. The X-ray crystal structure analysis revealed that the complex has an octahedral structure coordinated by three imidazole nitrogen atoms and three Schiff base (imine) nitrogen atoms. The uncoordinated NH groups of the imidazole moieties of 1 are easily deprotonated by the action of a base. The effect of deprotonation on the Ru III/RuII redox potential was studied by cyclic voltammetry in methanol containing 0.1 M LiClO4. Complete deprotonation shifts the RuII/RuII potential to a much more negative value from -0.18 to -0.72 V vs. Ag/Ag+, making it easier to oxidize. The bluish-purple RuIII complex, [RuIII(H3L)] 3+, was formed by controlled-potential electrolysis of 1, and the electronic spectrum is reported.
KW - Chirality
KW - N ligands
KW - Redox chemistry
KW - Ruthenium
KW - Schiff bases
KW - Tripodal ligands
UR - http://www.scopus.com/inward/record.url?scp=33748667295&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33748667295&partnerID=8YFLogxK
U2 - 10.1002/ejic.200600111
DO - 10.1002/ejic.200600111
M3 - Article
AN - SCOPUS:33748667295
SP - 3236
EP - 3243
JO - Chemische Berichte
JF - Chemische Berichte
SN - 0009-2940
IS - 16
ER -