Syntheses, structures, and magnetic properties of terephthalato bridged dinuclear copper(II) and manganese(II) complexes with a tetradentate N-donor Schiff base

Somnath Choubey; Subhasis Roy; Kishalay Bhar; Rajarshi Ghosh; Partha Mitra; Chia Her Lin; Joan Ribas; Barindra Kumar Ghosh

doi:10.1016/j.poly.2013.02.062

Syntheses, structures, and magnetic properties of terephthalato bridged dinuclear copper(II) and manganese(II) complexes with a tetradentate N-donor Schiff base

Somnath Choubey, Subhasis Roy, Kishalay Bhar, Rajarshi Ghosh, Partha Mitra, Chia Her Lin, Joan Ribas^*, Barindra Kumar Ghosh

^*Corresponding author for this work

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

29 Citations (Scopus)

Abstract

Three dinuclear compounds of the types [Cu₂(L) ₂(μ-tp)](ClO₄/PF₆)₂ (1/2) and [Mn₂(L)₂(μ-tp)](ClO₄)₂ H ₂O (3) [L = N,N′-(bis-(pyridin-2-yl)benzylidene)-1,3- propanediamine and tp = terephthalate dianion] have been synthesized and characterized. Structures of 1-3 are solved using single crystal X-ray diffraction measurements. The structural analyses show bis(monodentate) in 1/2 and bis(bidentate) in 3 of terephthalate bridging motifs resulting dicationic dinuclear unit [M₂(L)₂(μ-tp)]²⁺ [M = Cu (1/2) and Mn (3)]. Each metal center adopts distorted trigonal bipyramidal geometry in 1/2 and a distorted octahedral geometry in 3 with MN₄O and MN₄O₂ chromophores, respectively. Chelation by the tetradentate Schiff base along with bis(monodentate) and bis(bidentate) bridging of terephthalate complete pentacoordination around each copper(II) center in 1/2 and hexacoordination around each manganese(II) center in 3, respectively. Variable-temperature magnetic susceptibility measurements of 1-3 in the 2-300 K temperature range reveal weak antiferromagnetic interaction presumably due to long bridging arm.

Original language	English
Pages (from-to)	1-9
Number of pages	9
Journal	Polyhedron
Volume	55
DOIs	https://doi.org/10.1016/j.poly.2013.02.062
Publication status	Published - 2013 May 17
Externally published	Yes

Keywords

Copper(II)/manganese(II) complex
Crystal structure
Magnetic behavior
Schiff base
Terephthalate bridge

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1016/j.poly.2013.02.062

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@article{d8b37b6e81f44a46afeb23ba65e38428,

title = "Syntheses, structures, and magnetic properties of terephthalato bridged dinuclear copper(II) and manganese(II) complexes with a tetradentate N-donor Schiff base",

abstract = "Three dinuclear compounds of the types [Cu2(L) 2(μ-tp)](ClO4/PF6)2 (1/2) and [Mn2(L)2(μ-tp)](ClO4)2 H 2O (3) [L = N,N′-(bis-(pyridin-2-yl)benzylidene)-1,3- propanediamine and tp = terephthalate dianion] have been synthesized and characterized. Structures of 1-3 are solved using single crystal X-ray diffraction measurements. The structural analyses show bis(monodentate) in 1/2 and bis(bidentate) in 3 of terephthalate bridging motifs resulting dicationic dinuclear unit [M2(L)2(μ-tp)]2+ [M = Cu (1/2) and Mn (3)]. Each metal center adopts distorted trigonal bipyramidal geometry in 1/2 and a distorted octahedral geometry in 3 with MN4O and MN4O2 chromophores, respectively. Chelation by the tetradentate Schiff base along with bis(monodentate) and bis(bidentate) bridging of terephthalate complete pentacoordination around each copper(II) center in 1/2 and hexacoordination around each manganese(II) center in 3, respectively. Variable-temperature magnetic susceptibility measurements of 1-3 in the 2-300 K temperature range reveal weak antiferromagnetic interaction presumably due to long bridging arm.",

keywords = "Copper(II)/manganese(II) complex, Crystal structure, Magnetic behavior, Schiff base, Terephthalate bridge",

author = "Somnath Choubey and Subhasis Roy and Kishalay Bhar and Rajarshi Ghosh and Partha Mitra and Lin, {Chia Her} and Joan Ribas and Ghosh, {Barindra Kumar}",

note = "Funding Information: Financial supports from the CSIR, DST, New Delhi, India is gratefully acknowledged. The authors SC and KB are grateful to CSIR and SR to UGC New Delhi, India for fellowships. JR thanks Spanish Government (GrantCTQ2009/07264) for the financial support. C.-H. Lin acknowledges the support by National Science Council, Taiwan (NSC101-2113-M-033-007-MY3). The use of DST-funded National Single Crystal X-ray Diffraction Facility at the Department of Inorganic Chemistry, IACS, Kolkata, India for crystallographic studies is also acknowledged. ",

year = "2013",

month = may,

day = "17",

doi = "10.1016/j.poly.2013.02.062",

language = "English",

volume = "55",

pages = "1--9",

journal = "Polyhedron",

issn = "0277-5387",

publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Syntheses, structures, and magnetic properties of terephthalato bridged dinuclear copper(II) and manganese(II) complexes with a tetradentate N-donor Schiff base

AU - Choubey, Somnath

AU - Roy, Subhasis

AU - Bhar, Kishalay

AU - Ghosh, Rajarshi

AU - Mitra, Partha

AU - Lin, Chia Her

AU - Ribas, Joan

AU - Ghosh, Barindra Kumar

N1 - Funding Information: Financial supports from the CSIR, DST, New Delhi, India is gratefully acknowledged. The authors SC and KB are grateful to CSIR and SR to UGC New Delhi, India for fellowships. JR thanks Spanish Government (GrantCTQ2009/07264) for the financial support. C.-H. Lin acknowledges the support by National Science Council, Taiwan (NSC101-2113-M-033-007-MY3). The use of DST-funded National Single Crystal X-ray Diffraction Facility at the Department of Inorganic Chemistry, IACS, Kolkata, India for crystallographic studies is also acknowledged.

PY - 2013/5/17

Y1 - 2013/5/17

N2 - Three dinuclear compounds of the types [Cu2(L) 2(μ-tp)](ClO4/PF6)2 (1/2) and [Mn2(L)2(μ-tp)](ClO4)2 H 2O (3) [L = N,N′-(bis-(pyridin-2-yl)benzylidene)-1,3- propanediamine and tp = terephthalate dianion] have been synthesized and characterized. Structures of 1-3 are solved using single crystal X-ray diffraction measurements. The structural analyses show bis(monodentate) in 1/2 and bis(bidentate) in 3 of terephthalate bridging motifs resulting dicationic dinuclear unit [M2(L)2(μ-tp)]2+ [M = Cu (1/2) and Mn (3)]. Each metal center adopts distorted trigonal bipyramidal geometry in 1/2 and a distorted octahedral geometry in 3 with MN4O and MN4O2 chromophores, respectively. Chelation by the tetradentate Schiff base along with bis(monodentate) and bis(bidentate) bridging of terephthalate complete pentacoordination around each copper(II) center in 1/2 and hexacoordination around each manganese(II) center in 3, respectively. Variable-temperature magnetic susceptibility measurements of 1-3 in the 2-300 K temperature range reveal weak antiferromagnetic interaction presumably due to long bridging arm.

AB - Three dinuclear compounds of the types [Cu2(L) 2(μ-tp)](ClO4/PF6)2 (1/2) and [Mn2(L)2(μ-tp)](ClO4)2 H 2O (3) [L = N,N′-(bis-(pyridin-2-yl)benzylidene)-1,3- propanediamine and tp = terephthalate dianion] have been synthesized and characterized. Structures of 1-3 are solved using single crystal X-ray diffraction measurements. The structural analyses show bis(monodentate) in 1/2 and bis(bidentate) in 3 of terephthalate bridging motifs resulting dicationic dinuclear unit [M2(L)2(μ-tp)]2+ [M = Cu (1/2) and Mn (3)]. Each metal center adopts distorted trigonal bipyramidal geometry in 1/2 and a distorted octahedral geometry in 3 with MN4O and MN4O2 chromophores, respectively. Chelation by the tetradentate Schiff base along with bis(monodentate) and bis(bidentate) bridging of terephthalate complete pentacoordination around each copper(II) center in 1/2 and hexacoordination around each manganese(II) center in 3, respectively. Variable-temperature magnetic susceptibility measurements of 1-3 in the 2-300 K temperature range reveal weak antiferromagnetic interaction presumably due to long bridging arm.

KW - Copper(II)/manganese(II) complex

KW - Crystal structure

KW - Magnetic behavior

KW - Schiff base

KW - Terephthalate bridge

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U2 - 10.1016/j.poly.2013.02.062

DO - 10.1016/j.poly.2013.02.062

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SN - 0277-5387

VL - 55

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JO - Polyhedron

JF - Polyhedron

ER -

Syntheses, structures, and magnetic properties of terephthalato bridged dinuclear copper(II) and manganese(II) complexes with a tetradentate N-donor Schiff base

Abstract

Keywords

ASJC Scopus subject areas

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