Mononuclear transition metal complexes with sterically hindered carboxylate ligands: Synthesis, structural and spectral properties

Sethuraman Kannan; Galmari Venkatachalam; Ha Jin Lee; Byoung Koun Min; Woong Kim; Eunhae Koo; Young Rag Do; Sungho Yoon

doi:10.1016/j.poly.2010.10.019

Mononuclear transition metal complexes with sterically hindered carboxylate ligands: Synthesis, structural and spectral properties

Sethuraman Kannan, Galmari Venkatachalam, Ha Jin Lee, Byoung Koun Min, Woong Kim, Eunhae Koo, Young Rag Do, Sungho Yoon

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

14 Citations (Scopus)

Abstract

The metal coordination geometry in the active site of metalloproteins are very different from the one of small inorganic complexes, due to the inflexibility of the ligand set from amino acid side chains different from freely moving ligand set in synthesis. Using the sterically hindered 2,6-di-(p-fluorophenyl)benzoate(L) ligand, a series of mononuclear Co(II), Ni(II) and Cu(II) complexes of general formula [M(L)₂(Hdmpz) ₂] (where, Hdmpz = 3,5-dimethyl pyrazole) have been synthesized and characterized by the variety of spectroscopic methods. A distorted octahedral geometry in case of nickel, tetrahedral geometry for cobalt and square pyramidal in copper was observed in the X-ray studies, which also revealed that the uncoordinated oxygen atom of the carboxylate group forms intramolecular hydrogen bonding with the N-H group of the coordinated 3,5-dimethylpyrazole in case of cobalt and copper.

Original language	English
Pages (from-to)	340-346
Number of pages	7
Journal	Polyhedron
Volume	30
Issue number	2
DOIs	https://doi.org/10.1016/j.poly.2010.10.019
Publication status	Published - 2011 Feb 1

Bibliographical note

Funding Information:
This work was supported partly by the Korea Science and Engineering Foundation (KOSEF) grant and the Converging Research Center Program through the National Research Foundation of Korea (NRF) (No. 2009-0082832 ) funded by the Korea government (MEST). This work was also supported in part by KIST (Korea Institute of Science & Technology) for ‘National Agenda Project program’, the faculty research program 2009 of Kookmin University in Korea and the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MEST) (No. R11-2005-048-00000-0 ).

Keywords

3,5-Dimethylpyrazole
Crystal structures
Mononuclear metal complexes
Sterically hindered carboxylate ligand

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1016/j.poly.2010.10.019

Cite this

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title = "Mononuclear transition metal complexes with sterically hindered carboxylate ligands: Synthesis, structural and spectral properties",

abstract = "The metal coordination geometry in the active site of metalloproteins are very different from the one of small inorganic complexes, due to the inflexibility of the ligand set from amino acid side chains different from freely moving ligand set in synthesis. Using the sterically hindered 2,6-di-(p-fluorophenyl)benzoate(L) ligand, a series of mononuclear Co(II), Ni(II) and Cu(II) complexes of general formula [M(L)2(Hdmpz) 2] (where, Hdmpz = 3,5-dimethyl pyrazole) have been synthesized and characterized by the variety of spectroscopic methods. A distorted octahedral geometry in case of nickel, tetrahedral geometry for cobalt and square pyramidal in copper was observed in the X-ray studies, which also revealed that the uncoordinated oxygen atom of the carboxylate group forms intramolecular hydrogen bonding with the N-H group of the coordinated 3,5-dimethylpyrazole in case of cobalt and copper.",

keywords = "3,5-Dimethylpyrazole, Crystal structures, Mononuclear metal complexes, Sterically hindered carboxylate ligand",

author = "Sethuraman Kannan and Galmari Venkatachalam and Lee, {Ha Jin} and Min, {Byoung Koun} and Woong Kim and Eunhae Koo and Do, {Young Rag} and Sungho Yoon",

note = "Funding Information: This work was supported partly by the Korea Science and Engineering Foundation (KOSEF) grant and the Converging Research Center Program through the National Research Foundation of Korea (NRF) (No. 2009-0082832 ) funded by the Korea government (MEST). This work was also supported in part by KIST (Korea Institute of Science & Technology) for {\textquoteleft}National Agenda Project program{\textquoteright}, the faculty research program 2009 of Kookmin University in Korea and the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MEST) (No. R11-2005-048-00000-0 ). ",

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T1 - Mononuclear transition metal complexes with sterically hindered carboxylate ligands

T2 - Synthesis, structural and spectral properties

AU - Kannan, Sethuraman

AU - Venkatachalam, Galmari

AU - Lee, Ha Jin

AU - Min, Byoung Koun

AU - Kim, Woong

AU - Koo, Eunhae

AU - Do, Young Rag

AU - Yoon, Sungho

N1 - Funding Information: This work was supported partly by the Korea Science and Engineering Foundation (KOSEF) grant and the Converging Research Center Program through the National Research Foundation of Korea (NRF) (No. 2009-0082832 ) funded by the Korea government (MEST). This work was also supported in part by KIST (Korea Institute of Science & Technology) for ‘National Agenda Project program’, the faculty research program 2009 of Kookmin University in Korea and the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MEST) (No. R11-2005-048-00000-0 ).

PY - 2011/2/1

Y1 - 2011/2/1

N2 - The metal coordination geometry in the active site of metalloproteins are very different from the one of small inorganic complexes, due to the inflexibility of the ligand set from amino acid side chains different from freely moving ligand set in synthesis. Using the sterically hindered 2,6-di-(p-fluorophenyl)benzoate(L) ligand, a series of mononuclear Co(II), Ni(II) and Cu(II) complexes of general formula [M(L)2(Hdmpz) 2] (where, Hdmpz = 3,5-dimethyl pyrazole) have been synthesized and characterized by the variety of spectroscopic methods. A distorted octahedral geometry in case of nickel, tetrahedral geometry for cobalt and square pyramidal in copper was observed in the X-ray studies, which also revealed that the uncoordinated oxygen atom of the carboxylate group forms intramolecular hydrogen bonding with the N-H group of the coordinated 3,5-dimethylpyrazole in case of cobalt and copper.

AB - The metal coordination geometry in the active site of metalloproteins are very different from the one of small inorganic complexes, due to the inflexibility of the ligand set from amino acid side chains different from freely moving ligand set in synthesis. Using the sterically hindered 2,6-di-(p-fluorophenyl)benzoate(L) ligand, a series of mononuclear Co(II), Ni(II) and Cu(II) complexes of general formula [M(L)2(Hdmpz) 2] (where, Hdmpz = 3,5-dimethyl pyrazole) have been synthesized and characterized by the variety of spectroscopic methods. A distorted octahedral geometry in case of nickel, tetrahedral geometry for cobalt and square pyramidal in copper was observed in the X-ray studies, which also revealed that the uncoordinated oxygen atom of the carboxylate group forms intramolecular hydrogen bonding with the N-H group of the coordinated 3,5-dimethylpyrazole in case of cobalt and copper.

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KW - Crystal structures

KW - Mononuclear metal complexes

KW - Sterically hindered carboxylate ligand

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Mononuclear transition metal complexes with sterically hindered carboxylate ligands: Synthesis, structural and spectral properties

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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