Geometric isomerism and redox properties of ruthenium(II/III) complexes with 3-hydroxypicolinamide

Ryoji Mitsuhashi; Takayoshi Suzuki; Masahiro Mikuriya

doi:10.1246/cl.171166

Geometric isomerism and redox properties of ruthenium(II/III) complexes with 3-hydroxypicolinamide

Ryoji Mitsuhashi, Takayoshi Suzuki, Masahiro Mikuriya

Research Institute for Interdisciplinary Science

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

Abstract

Two geometric isomers of [RuCl₂(PPh₃)₂(O-N)]-type complex were prepared and characterized by X-ray crystallography (PPh₃ = triphenylphosphine, O-N = Hpia/pia^-, Hpia = 3-hydroxypicolinamide). The electrochemical properties of the complexes upon protonation/deprotonation were investigated. The redox potential of the Ru center was remarkably shifted by isomerization. The UV-vis and electrochemical measurements suggested that slow isomerization from trans(P,Cl),trans(P,N) geometry to trans(P,P) geometry induced the oxidation and deprotonation of the complex.

Original language	English
Pages (from-to)	479-482
Number of pages	4
Journal	Chemistry Letters
Volume	47
Issue number	4
DOIs	https://doi.org/10.1246/cl.171166
Publication status	Published - 2018

Keywords

Geometric isomerism
Redox potential shift
Ru(II/III) complex

ASJC Scopus subject areas

Chemistry(all)

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10.1246/cl.171166

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@article{907994c467bb4bb29c3577f56cba41e5,

title = "Geometric isomerism and redox properties of ruthenium(II/III) complexes with 3-hydroxypicolinamide",

abstract = "Two geometric isomers of [RuCl2(PPh3)2(O-N)]-type complex were prepared and characterized by X-ray crystallography (PPh3 = triphenylphosphine, O-N = Hpia/pia-, Hpia = 3-hydroxypicolinamide). The electrochemical properties of the complexes upon protonation/deprotonation were investigated. The redox potential of the Ru center was remarkably shifted by isomerization. The UV-vis and electrochemical measurements suggested that slow isomerization from trans(P,Cl),trans(P,N) geometry to trans(P,P) geometry induced the oxidation and deprotonation of the complex.",

keywords = "Geometric isomerism, Redox potential shift, Ru(II/III) complex",

author = "Ryoji Mitsuhashi and Takayoshi Suzuki and Masahiro Mikuriya",

note = "Funding Information: We thank Mr. Masatoshi Mori (Okayama University) for 1H and 31P NMR measurements. The computations were performed using Research Center for Computational Science, Okazaki, Japan. The magnetic measurements were conducted in Institute for Molecular Science, supported by Nanotechnology Platform (Molecule and Material Synthesis) of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan.",

year = "2018",

doi = "10.1246/cl.171166",

language = "English",

volume = "47",

pages = "479--482",

journal = "Chemistry Letters",

issn = "0366-7022",

publisher = "Chemical Society of Japan",

number = "4",

}

TY - JOUR

T1 - Geometric isomerism and redox properties of ruthenium(II/III) complexes with 3-hydroxypicolinamide

AU - Mitsuhashi, Ryoji

AU - Suzuki, Takayoshi

AU - Mikuriya, Masahiro

N1 - Funding Information: We thank Mr. Masatoshi Mori (Okayama University) for 1H and 31P NMR measurements. The computations were performed using Research Center for Computational Science, Okazaki, Japan. The magnetic measurements were conducted in Institute for Molecular Science, supported by Nanotechnology Platform (Molecule and Material Synthesis) of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan.

PY - 2018

Y1 - 2018

N2 - Two geometric isomers of [RuCl2(PPh3)2(O-N)]-type complex were prepared and characterized by X-ray crystallography (PPh3 = triphenylphosphine, O-N = Hpia/pia-, Hpia = 3-hydroxypicolinamide). The electrochemical properties of the complexes upon protonation/deprotonation were investigated. The redox potential of the Ru center was remarkably shifted by isomerization. The UV-vis and electrochemical measurements suggested that slow isomerization from trans(P,Cl),trans(P,N) geometry to trans(P,P) geometry induced the oxidation and deprotonation of the complex.

AB - Two geometric isomers of [RuCl2(PPh3)2(O-N)]-type complex were prepared and characterized by X-ray crystallography (PPh3 = triphenylphosphine, O-N = Hpia/pia-, Hpia = 3-hydroxypicolinamide). The electrochemical properties of the complexes upon protonation/deprotonation were investigated. The redox potential of the Ru center was remarkably shifted by isomerization. The UV-vis and electrochemical measurements suggested that slow isomerization from trans(P,Cl),trans(P,N) geometry to trans(P,P) geometry induced the oxidation and deprotonation of the complex.

KW - Geometric isomerism

KW - Redox potential shift

KW - Ru(II/III) complex

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EP - 482

JO - Chemistry Letters

JF - Chemistry Letters

SN - 0366-7022

IS - 4

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