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Issue 7, 2018
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Influence of water on the structure and magnetic properties of a copper bromide coordination compound with 3-amino-4-ethoxycarbonylpyrazole

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Abstract

The influence of water on a polynuclear [CuL2Br2]n (1) copper bromide compound with 3-amino-4-ethoxycarbonylpyrazole (L) is investigated. The abundance of water in solution results in the formation of three new complexes with drastically different coordination units: polynuclear {[CuL4Br]Br}n·nH2O (2) and two mononuclear polymorphs [CuL4Br2]·2H2O (monoclinic – 3, triclinic – 4). The crystal structures are determined for all three complexes. Complex 2 has a weak (≪1 cm−1) superexchange interaction between copper ions and bromide ions. Complexes 3 and 4 have no exchange interaction. It is found that the two polynuclear complexes may transform into each other through dissolution followed by recrystallization under certain conditions.

Graphical abstract: Influence of water on the structure and magnetic properties of a copper bromide coordination compound with 3-amino-4-ethoxycarbonylpyrazole

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Publication details

The article was received on 02 Jan 2018, accepted on 12 Feb 2018 and first published on 13 Feb 2018


Article type: Paper
DOI: 10.1039/C8NJ00017D
Citation: New J. Chem., 2018,42, 4902-4908
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    Influence of water on the structure and magnetic properties of a copper bromide coordination compound with 3-amino-4-ethoxycarbonylpyrazole

    A. S. Berezin, A. D. Ivanova, V. Yu. Komarov, V. A. Nadolinny and L. G. Lavrenova, New J. Chem., 2018, 42, 4902
    DOI: 10.1039/C8NJ00017D

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