Thioether Bonded Nickel(II)-Azoimidazole Complexes: Structures, Spectra and Electrochemical Oxidation to the Nickel(III) State

Soumendranath Nandi; Debashis Bannerjee; Jian-Sung Wu; Tian-Huey Lu; Alexandra M. Z. Slawin; John Derek Woollins; Joan Ribas; Chittaranjan Sinha

doi:10.1002/ejic.200900423

Thioether Bonded Nickel(II)-Azoimidazole Complexes: Structures, Spectra and Electrochemical Oxidation to the Nickel(III) State

Soumendranath Nandi, Debashis Bannerjee, Jian-Sung Wu, Tian-Huey Lu, Alexandra M. Z. Slawin, John Derek Woollins, Joan Ribas, Chittaranjan Sinha

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

Abstract

Nickel(II) complexes of 1-alkyl-2-[(o-thioalkyl)phenylazojimidazole (SRaaiNR') are described in this article. SRaaiNR' has imidazole-N, azo-N and thioether-S donor centres. Counter ions CIO4, pseudohalides [azide (N-3(-)), thiocyanate (CNS-)] are used in the syntheses of complexes. One of the structures of [Ni(SRaaiNR')(2)](CIO4)(2) has suggested meridional binding of tridendate chelator with cis-trans-cis configuration in the sequence of cis-N(imidazole), trans-N(azo) and cis-S(thioether). Structural study of Nil'-azido-SRaaiNR' defines mu(1), (1)-N-3 bridged Ni' dimer, [Ni(NNS)(N-3)(2)](2) and thus show interesting intrarnolecular ferromagnetic coupling. The best fit gave the results: J = 38.13 +/- 0.6 cm(-1), g = 2.24 +/- 0.002, D = 8.1 +/- 0.4 cm(-1) and R = 2.1 X 10(1). DFT computation has attempted to explain spectral, redox and magnetic proper-ties of the complexes. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)

Original language	English
Pages (from-to)	3972-3981
Number of pages	10
Journal	European Journal of Inorganic Chemistry
Issue number	26
DOIs	https://doi.org/10.1002/ejic.200900423
Publication status	Published - Sept 2009

Keywords

Nickel
Electrochemistry
Magnetic properties
Ferromagnetic coupling
Density functional calculations
X-RAY-STRUCTURE
SIZE-SPECIFIC TRANSFORMATIONS
COPPER(II) COMPLEXES
CONTAINING LIGANDS
METAL-COMPLEXES
REDUCTION
REDOX
COORDINATION
POTENTIALS
CHEMISTRY

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10.1002/ejic.200900423

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@article{ce774c57dda540a1be8e095cd728893d,

title = "Thioether Bonded Nickel(II)-Azoimidazole Complexes: Structures, Spectra and Electrochemical Oxidation to the Nickel(III) State",

abstract = "Nickel(II) complexes of 1-alkyl-2-[(o-thioalkyl)phenylazojimidazole (SRaaiNR') are described in this article. SRaaiNR' has imidazole-N, azo-N and thioether-S donor centres. Counter ions CIO4, pseudohalides [azide (N-3(-)), thiocyanate (CNS-)] are used in the syntheses of complexes. One of the structures of [Ni(SRaaiNR')(2)](CIO4)(2) has suggested meridional binding of tridendate chelator with cis-trans-cis configuration in the sequence of cis-N(imidazole), trans-N(azo) and cis-S(thioether). Structural study of Nil'-azido-SRaaiNR' defines mu(1), (1)-N-3 bridged Ni' dimer, [Ni(NNS)(N-3)(2)](2) and thus show interesting intrarnolecular ferromagnetic coupling. The best fit gave the results: J = 38.13 +/- 0.6 cm(-1), g = 2.24 +/- 0.002, D = 8.1 +/- 0.4 cm(-1) and R = 2.1 X 10(1). DFT computation has attempted to explain spectral, redox and magnetic proper-ties of the complexes. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)",

keywords = "Nickel, Electrochemistry, Magnetic properties, Ferromagnetic coupling, Density functional calculations, X-RAY-STRUCTURE, SIZE-SPECIFIC TRANSFORMATIONS, COPPER(II) COMPLEXES, CONTAINING LIGANDS, METAL-COMPLEXES, REDUCTION, REDOX, COORDINATION, POTENTIALS, CHEMISTRY",

author = "Soumendranath Nandi and Debashis Bannerjee and Jian-Sung Wu and Tian-Huey Lu and Slawin, {Alexandra M. Z.} and Woollins, {John Derek} and Joan Ribas and Chittaranjan Sinha",

year = "2009",

month = sep,

doi = "10.1002/ejic.200900423",

language = "English",

pages = "3972--3981",

journal = "European Journal of Inorganic Chemistry",

issn = "1434-1948",

publisher = "Wiley-Blackwell",

number = "26",

}

TY - JOUR

T1 - Thioether Bonded Nickel(II)-Azoimidazole Complexes: Structures, Spectra and Electrochemical Oxidation to the Nickel(III) State

AU - Nandi, Soumendranath

AU - Bannerjee, Debashis

AU - Wu, Jian-Sung

AU - Lu, Tian-Huey

AU - Slawin, Alexandra M. Z.

AU - Woollins, John Derek

AU - Ribas, Joan

AU - Sinha, Chittaranjan

PY - 2009/9

Y1 - 2009/9

N2 - Nickel(II) complexes of 1-alkyl-2-[(o-thioalkyl)phenylazojimidazole (SRaaiNR') are described in this article. SRaaiNR' has imidazole-N, azo-N and thioether-S donor centres. Counter ions CIO4, pseudohalides [azide (N-3(-)), thiocyanate (CNS-)] are used in the syntheses of complexes. One of the structures of [Ni(SRaaiNR')(2)](CIO4)(2) has suggested meridional binding of tridendate chelator with cis-trans-cis configuration in the sequence of cis-N(imidazole), trans-N(azo) and cis-S(thioether). Structural study of Nil'-azido-SRaaiNR' defines mu(1), (1)-N-3 bridged Ni' dimer, [Ni(NNS)(N-3)(2)](2) and thus show interesting intrarnolecular ferromagnetic coupling. The best fit gave the results: J = 38.13 +/- 0.6 cm(-1), g = 2.24 +/- 0.002, D = 8.1 +/- 0.4 cm(-1) and R = 2.1 X 10(1). DFT computation has attempted to explain spectral, redox and magnetic proper-ties of the complexes. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)

AB - Nickel(II) complexes of 1-alkyl-2-[(o-thioalkyl)phenylazojimidazole (SRaaiNR') are described in this article. SRaaiNR' has imidazole-N, azo-N and thioether-S donor centres. Counter ions CIO4, pseudohalides [azide (N-3(-)), thiocyanate (CNS-)] are used in the syntheses of complexes. One of the structures of [Ni(SRaaiNR')(2)](CIO4)(2) has suggested meridional binding of tridendate chelator with cis-trans-cis configuration in the sequence of cis-N(imidazole), trans-N(azo) and cis-S(thioether). Structural study of Nil'-azido-SRaaiNR' defines mu(1), (1)-N-3 bridged Ni' dimer, [Ni(NNS)(N-3)(2)](2) and thus show interesting intrarnolecular ferromagnetic coupling. The best fit gave the results: J = 38.13 +/- 0.6 cm(-1), g = 2.24 +/- 0.002, D = 8.1 +/- 0.4 cm(-1) and R = 2.1 X 10(1). DFT computation has attempted to explain spectral, redox and magnetic proper-ties of the complexes. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)

KW - Nickel

KW - Electrochemistry

KW - Magnetic properties

KW - Ferromagnetic coupling

KW - Density functional calculations

KW - X-RAY-STRUCTURE

KW - SIZE-SPECIFIC TRANSFORMATIONS

KW - COPPER(II) COMPLEXES

KW - CONTAINING LIGANDS

KW - METAL-COMPLEXES

KW - REDUCTION

KW - REDOX

KW - COORDINATION

KW - POTENTIALS

KW - CHEMISTRY

U2 - 10.1002/ejic.200900423

DO - 10.1002/ejic.200900423

M3 - Article

SN - 1434-1948

SP - 3972

EP - 3981

JO - European Journal of Inorganic Chemistry

JF - European Journal of Inorganic Chemistry

IS - 26

ER -

Thioether Bonded Nickel(II)-Azoimidazole Complexes: Structures, Spectra and Electrochemical Oxidation to the Nickel(III) State

Abstract

Keywords

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