Synthesis, Crystal Structure and Magnetic Properties of a Zinc(Ⅱ) Complex with Quinoxaline-substituted Nitronyl Nitroxide Radicals

doi:10.11944/j.issn.1000-0518.2016.12.160073

Chinese Journal of Applied Chemistry ›› 2016, Vol. 33 ›› Issue (12): 1435-1440.DOI: 10.11944/j.issn.1000-0518.2016.12.160073

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Synthesis, Crystal Structure and Magnetic Properties of a Zinc(Ⅱ) Complex with Quinoxaline-substituted Nitronyl Nitroxide Radicals

ZHANG Youjuan^a,YANG Jinhui^a^b,CHEN Jing^a^b^*()

^aCollege of Chemistry and Chemical Engineering,Anyang Normal University,Anyang,Henan 455002,China
^bSchool of Chemical Engineering and Energy,Zhengzhou University,Zhengzhou 450052,China

Received:2016-02-25 Accepted:2016-06-14 Published:2016-12-05 Online:2016-12-05
Contact: CHEN Jing
Supported by:
Supported by the National Natural Science Foundation of China(No.21071006)

Abstract

Abstract:

A two-spin complex{[Zn(acac)₂](NITQ)₂}·2CH₂Cl₂(acac=acetylaceonate anion, NITQ=2-(2-quinoxalinyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) was synthesized from a quinoxalinyl substituted nitroxide radical. The X-ray analysis of the single crystal reveals that two NITQ radicals act as monodentate ligands coordinated to Zn²⁺ to form a two-spin octahedral complex. The magnetic study shows that two NITQ radicals have ferromagnetic interaction, the Curie constant C=0.7242 cm³·K/mol and Weiss constant θ=0.5958 K.

Key words: nitronyl nitroxide, Zn(Ⅱ), crystal structure, magnetic properties

ZHANG Youjuan, YANG Jinhui, CHEN Jing. Synthesis, Crystal Structure and Magnetic Properties of a Zinc(Ⅱ) Complex with Quinoxaline-substituted Nitronyl Nitroxide Radicals[J]. Chinese Journal of Applied Chemistry, 2016, 33(12): 1435-1440.

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Synthesis, Crystal Structure and Magnetic Properties of a Zinc(Ⅱ) Complex with Quinoxaline-substituted Nitronyl Nitroxide Radicals

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