Oximato-bridged copper(II) compounds: syntheses, molecular structures, magnetic, thermal and spectroscopic properties

Jnan P. Naskar; Chiranjan Biswas; Nirmalya Bandyopadhyay; James Walsh; Floriana Tuna; Miaoli Zhu; Liping Lu

doi:10.1080/00958972.2016.1208184

Oximato-bridged copper(II) compounds: syntheses, molecular structures, magnetic, thermal and spectroscopic properties

Jnan P. Naskar^*, Chiranjan Biswas, Nirmalya Bandyopadhyay, James Walsh, Floriana Tuna, Miaoli Zhu, Liping Lu

^*Corresponding author for this work

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

Abstract

Reaction of the Schiff base, 1-(4-methylimidazol-5-yl) phenylhydrazonopropane-2-one oxime (LH), with copper(II) perchlorate hexahydrate and copper(II) nitrate trihydrate in a 1 : 1 M proportion in methanol affords [Cu₂L₂(H₂O)(ClO₄)](ClO₄) (1) and [Cu₂L₂(H₂O)₂](NO₃)₂] (2) in moderate yields. Both 1 and 2 have been characterized by elemental analysis, ESI-MS, FT-IR, UV–vis absorption spectroscopy, EPR, electric conductivity, and magnetic susceptibility measurements. The X-ray crystal structures of 1·CH₃COCH₃ and 2 have been determined. Both compounds are dinuclear copper(II) complexes, with each copper μ₂-bridged by two oxime ligands in a μ₂-η¹,η² fashion. Variable temperature magnetic studies on 1 and 2 show that both compounds are dominated by an antiferromagnetic coupling through the oxime bridges.

Original language	English
Pages (from-to)	2329-2341
Number of pages	13
Journal	Journal of Coordination Chemistry
Volume	69
Issue number	15
Early online date	4 Jul 2016
DOIs	https://doi.org/10.1080/00958972.2016.1208184
Publication status	Published - 2 Aug 2016

Keywords

copper
EPR spectroscopy
magnetic properties
Oxime
thermal behavior

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10.1080/00958972.2016.1208184

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title = "Oximato-bridged copper(II) compounds: syntheses, molecular structures, magnetic, thermal and spectroscopic properties",

abstract = "Reaction of the Schiff base, 1-(4-methylimidazol-5-yl) phenylhydrazonopropane-2-one oxime (LH), with copper(II) perchlorate hexahydrate and copper(II) nitrate trihydrate in a 1 : 1 M proportion in methanol affords [Cu2L2(H2O)(ClO4)](ClO4) (1) and [Cu2L2(H2O)2](NO3)2] (2) in moderate yields. Both 1 and 2 have been characterized by elemental analysis, ESI-MS, FT-IR, UV–vis absorption spectroscopy, EPR, electric conductivity, and magnetic susceptibility measurements. The X-ray crystal structures of 1·CH3COCH3 and 2 have been determined. Both compounds are dinuclear copper(II) complexes, with each copper μ2-bridged by two oxime ligands in a μ2-η1,η2 fashion. Variable temperature magnetic studies on 1 and 2 show that both compounds are dominated by an antiferromagnetic coupling through the oxime bridges.",

keywords = "copper, EPR spectroscopy, magnetic properties, Oxime, thermal behavior",

author = "Naskar, {Jnan P.} and Chiranjan Biswas and Nirmalya Bandyopadhyay and James Walsh and Floriana Tuna and Miaoli Zhu and Liping Lu",

year = "2016",

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doi = "10.1080/00958972.2016.1208184",

language = "English",

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AU - Naskar, Jnan P.

AU - Biswas, Chiranjan

AU - Bandyopadhyay, Nirmalya

AU - Walsh, James

AU - Tuna, Floriana

AU - Zhu, Miaoli

AU - Lu, Liping

PY - 2016/8/2

Y1 - 2016/8/2

N2 - Reaction of the Schiff base, 1-(4-methylimidazol-5-yl) phenylhydrazonopropane-2-one oxime (LH), with copper(II) perchlorate hexahydrate and copper(II) nitrate trihydrate in a 1 : 1 M proportion in methanol affords [Cu2L2(H2O)(ClO4)](ClO4) (1) and [Cu2L2(H2O)2](NO3)2] (2) in moderate yields. Both 1 and 2 have been characterized by elemental analysis, ESI-MS, FT-IR, UV–vis absorption spectroscopy, EPR, electric conductivity, and magnetic susceptibility measurements. The X-ray crystal structures of 1·CH3COCH3 and 2 have been determined. Both compounds are dinuclear copper(II) complexes, with each copper μ2-bridged by two oxime ligands in a μ2-η1,η2 fashion. Variable temperature magnetic studies on 1 and 2 show that both compounds are dominated by an antiferromagnetic coupling through the oxime bridges.

AB - Reaction of the Schiff base, 1-(4-methylimidazol-5-yl) phenylhydrazonopropane-2-one oxime (LH), with copper(II) perchlorate hexahydrate and copper(II) nitrate trihydrate in a 1 : 1 M proportion in methanol affords [Cu2L2(H2O)(ClO4)](ClO4) (1) and [Cu2L2(H2O)2](NO3)2] (2) in moderate yields. Both 1 and 2 have been characterized by elemental analysis, ESI-MS, FT-IR, UV–vis absorption spectroscopy, EPR, electric conductivity, and magnetic susceptibility measurements. The X-ray crystal structures of 1·CH3COCH3 and 2 have been determined. Both compounds are dinuclear copper(II) complexes, with each copper μ2-bridged by two oxime ligands in a μ2-η1,η2 fashion. Variable temperature magnetic studies on 1 and 2 show that both compounds are dominated by an antiferromagnetic coupling through the oxime bridges.

KW - copper

KW - EPR spectroscopy

KW - magnetic properties

KW - Oxime

KW - thermal behavior

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JO - Journal of Coordination Chemistry

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ER -

Oximato-bridged copper(II) compounds: syntheses, molecular structures, magnetic, thermal and spectroscopic properties

Abstract

Keywords

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CCDC 932860: Experimental Crystal Structure Determination