Synthesis and studies of rare acylhydrazine bridged strong antiferromagnetically coupled dicopper(II) and dioxovanadium(V) complexes of a pyridyl-pyrazole derived Schiff base ligand

Atanu Jana; Saugata Konar; Tarak Nath Mandal; Kinsuk Das; Sangita Ray; Ananda Sarkar; Cai Ming Liu; Susanta Kumar Kar

doi:10.1016/j.poly.2012.07.076

Synthesis and studies of rare acylhydrazine bridged strong antiferromagnetically coupled dicopper(II) and dioxovanadium(V) complexes of a pyridyl-pyrazole derived Schiff base ligand

Atanu Jana, Saugata Konar, Tarak Nath Mandal, Kinsuk Das, Sangita Ray, Ananda Sarkar, Cai Ming Liu, Susanta Kumar Kar

Division of System Semiconductor

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

12 Scopus citations

Abstract

A binuclear acylhydrazine bridged Cu(II) complex, [Cu₂(L) (NO₃)₃(H₂O)] (1), and an anti-orthogonal binuclear oxovanadium(V) complex, [V₂O₄(L)₂] (2), have been synthesized and characterized spectroscopically and crystallographically. The ligand HL has two potentially bridging functional groups (μ-O, μ-N-N) and consequently can exist in the following coordination conformers: (a) metal centers bridged by μ-O, (b) metal centers bridged by μ-N-N. A rare acylhydrazine bridged (a) type configuration exists in the dinuclear Cu(II) complex 1. The bridging ligand mediates a strong antiferromagnetic coupling (J = -99 cm^-1). The exchange pathway parameters have also been evaluated from density functional theoretical calculations to corroborate the bridging signatures with experimental findings (J = -93.96 cm^-1). Molecule 2 has a centrosymmetric structure with each vanadium center having a distorted octahedral geometry. It shows a one step irreversible reduction at +0.43 V. The bond angles, bond lengths and torsion angles in 2 are correlated with DFT.

Original language	English
Pages (from-to)	105-112
Number of pages	8
Journal	Polyhedron
Volume	46
Issue number	1
DOIs	https://doi.org/10.1016/j.poly.2012.07.076
State	Published - 9 Oct 2012

Keywords

Acylhydrazine
Binuclear copper complex
Binuclear oxovanadium complex
Coordination
Crystal
DFT
Magnetism

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@article{bb38316d215544b89500d37858e0d283,

title = "Synthesis and studies of rare acylhydrazine bridged strong antiferromagnetically coupled dicopper(II) and dioxovanadium(V) complexes of a pyridyl-pyrazole derived Schiff base ligand",

abstract = "A binuclear acylhydrazine bridged Cu(II) complex, [Cu2(L) (NO3)3(H2O)] (1), and an anti-orthogonal binuclear oxovanadium(V) complex, [V2O4(L)2] (2), have been synthesized and characterized spectroscopically and crystallographically. The ligand HL has two potentially bridging functional groups (μ-O, μ-N-N) and consequently can exist in the following coordination conformers: (a) metal centers bridged by μ-O, (b) metal centers bridged by μ-N-N. A rare acylhydrazine bridged (a) type configuration exists in the dinuclear Cu(II) complex 1. The bridging ligand mediates a strong antiferromagnetic coupling (J = -99 cm-1). The exchange pathway parameters have also been evaluated from density functional theoretical calculations to corroborate the bridging signatures with experimental findings (J = -93.96 cm-1). Molecule 2 has a centrosymmetric structure with each vanadium center having a distorted octahedral geometry. It shows a one step irreversible reduction at +0.43 V. The bond angles, bond lengths and torsion angles in 2 are correlated with DFT.",

keywords = "Acylhydrazine, Binuclear copper complex, Binuclear oxovanadium complex, Coordination, Crystal, DFT, Magnetism",

author = "Atanu Jana and Saugata Konar and Mandal, {Tarak Nath} and Kinsuk Das and Sangita Ray and Ananda Sarkar and Liu, {Cai Ming} and Kar, {Susanta Kumar}",

year = "2012",

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day = "9",

doi = "10.1016/j.poly.2012.07.076",

language = "English",

volume = "46",

pages = "105--112",

journal = "Polyhedron",

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TY - JOUR

T1 - Synthesis and studies of rare acylhydrazine bridged strong antiferromagnetically coupled dicopper(II) and dioxovanadium(V) complexes of a pyridyl-pyrazole derived Schiff base ligand

AU - Jana, Atanu

AU - Konar, Saugata

AU - Mandal, Tarak Nath

AU - Das, Kinsuk

AU - Ray, Sangita

AU - Sarkar, Ananda

AU - Liu, Cai Ming

AU - Kar, Susanta Kumar

PY - 2012/10/9

Y1 - 2012/10/9

N2 - A binuclear acylhydrazine bridged Cu(II) complex, [Cu2(L) (NO3)3(H2O)] (1), and an anti-orthogonal binuclear oxovanadium(V) complex, [V2O4(L)2] (2), have been synthesized and characterized spectroscopically and crystallographically. The ligand HL has two potentially bridging functional groups (μ-O, μ-N-N) and consequently can exist in the following coordination conformers: (a) metal centers bridged by μ-O, (b) metal centers bridged by μ-N-N. A rare acylhydrazine bridged (a) type configuration exists in the dinuclear Cu(II) complex 1. The bridging ligand mediates a strong antiferromagnetic coupling (J = -99 cm-1). The exchange pathway parameters have also been evaluated from density functional theoretical calculations to corroborate the bridging signatures with experimental findings (J = -93.96 cm-1). Molecule 2 has a centrosymmetric structure with each vanadium center having a distorted octahedral geometry. It shows a one step irreversible reduction at +0.43 V. The bond angles, bond lengths and torsion angles in 2 are correlated with DFT.

AB - A binuclear acylhydrazine bridged Cu(II) complex, [Cu2(L) (NO3)3(H2O)] (1), and an anti-orthogonal binuclear oxovanadium(V) complex, [V2O4(L)2] (2), have been synthesized and characterized spectroscopically and crystallographically. The ligand HL has two potentially bridging functional groups (μ-O, μ-N-N) and consequently can exist in the following coordination conformers: (a) metal centers bridged by μ-O, (b) metal centers bridged by μ-N-N. A rare acylhydrazine bridged (a) type configuration exists in the dinuclear Cu(II) complex 1. The bridging ligand mediates a strong antiferromagnetic coupling (J = -99 cm-1). The exchange pathway parameters have also been evaluated from density functional theoretical calculations to corroborate the bridging signatures with experimental findings (J = -93.96 cm-1). Molecule 2 has a centrosymmetric structure with each vanadium center having a distorted octahedral geometry. It shows a one step irreversible reduction at +0.43 V. The bond angles, bond lengths and torsion angles in 2 are correlated with DFT.

KW - Acylhydrazine

KW - Binuclear copper complex

KW - Binuclear oxovanadium complex

KW - Coordination

KW - Crystal

KW - DFT

KW - Magnetism

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DO - 10.1016/j.poly.2012.07.076

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IS - 1

ER -

Synthesis and studies of rare acylhydrazine bridged strong antiferromagnetically coupled dicopper(II) and dioxovanadium(V) complexes of a pyridyl-pyrazole derived Schiff base ligand

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