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A carbon-free inorganic–metal complex consisting of an all-nitrogen pentazole anion, a Zn(II) cation and H2O

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Abstract

A carbon-free inorganic–metal complex [Zn(H2O)4(N5)2]·4H2O was synthesized by the ion metathesis of [Na(H2O)(N5)]·2H2O solution with Zn(NO3)2·6H2O. The complex was well characterized by IR and Raman spectroscopy, elemental analysis (EA), powder X-ray diffraction (PXRD), and differential scanning calorimetry (DSC). The structure of the complex was confirmed by single-crystal X-ray crystallography and a Zn(II) ion is coordinated in a quadrilateral bipyramid environment in which the axial position is formed by two nitrogen atoms (N1) from two pentazolate rings (cyclo-N5) and the equatorial plane is formed by four oxygen atoms (O1) from four coordinated water molecules. The thermal analysis of [Zn(H2O)4(N5)2]·4H2O reveals that although water plays an important role in stabilizing cyclo-N5, dehydration does not cause immediate decomposition of the anion. However, cyclo-N5 decomposed into N3 and N2 gas at 107.9 °C (onset). Based on its chemical compatibility and stability, the complex exhibits promising potential as a modern environmentally-friendly energetic material.

Graphical abstract: A carbon-free inorganic–metal complex consisting of an all-nitrogen pentazole anion, a Zn(ii) cation and H2O

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Publication details

The article was received on 31 Aug 2017, accepted on 22 Sep 2017 and first published on 28 Sep 2017


Article type: Communication
DOI: 10.1039/C7DT03231E
Citation: Dalton Trans., 2017, Advance Article
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    A carbon-free inorganic–metal complex consisting of an all-nitrogen pentazole anion, a Zn(II) cation and H2O

    Y. Xu, P. Wang, Q. Lin and M. Lu, Dalton Trans., 2017, Advance Article , DOI: 10.1039/C7DT03231E

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