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Inorganics 2018, 6(2), 59; https://doi.org/10.3390/inorganics6020059

Ni(NH3)2(NO3)2—A 3-D Network through Bridging Nitrate Units Isolated from the Thermal Decomposition of Nickel Hexammine Dinitrate

1
WestCHEM School of Chemistry, University of Glasgow, University Avenue, Glasgow G12 8QQ, UK
2
Helmholtz-Zentrum Berlin für Materialien und Energie, Department Structure and Dynamics of Energy Materials, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
3
Airbus Group Innovations, XCXDI, 81663 Munich, Germany
4
Institute of Chemical Engineering, Polish Academy of Sciences, 44100 Gliwice, Poland
*
Author to whom correspondence should be addressed.
Received: 14 May 2018 / Revised: 31 May 2018 / Accepted: 1 June 2018 / Published: 5 June 2018
(This article belongs to the Section Inorganic Solid-State Chemistry)
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Abstract

Nickel nitrate diammine, Ni(NH3)2(NO3)2, can be synthesised from the thermal decomposition of nickel nitrate hexammine, Ni[(NH3)6](NO3)2. The hexammine decomposes in two distinct major stages; the first releases 4 equivalents of ammonia while the second involves the release of NOx, N2, and H2O to yield NiO. The intermediate diammine compound can be isolated following the first deammoniation step or synthesised as a single phase from the hexammine under vacuum. Powder X-ray diffraction (PXD) experiments have allowed the structure of Ni(NH3)2(NO3)2 to be solved for the first time. The compound crystallises in orthorhombic space group Pca21 (a = 11.0628 (5) Å, b = 6.0454 (3) Å, c = 9.3526 (4) Å; Z = 4) and contains 11 non-hydrogen atoms in the asymmetric unit. Fourier transform infrared (FTIR) spectroscopy demonstrates that the bonding in the ammine is consistent with the structure determined by PXD. View Full-Text
Keywords: crystal structure; ammine complex; structure determination; ammonia storage; vibrational spectroscopy crystal structure; ammine complex; structure determination; ammonia storage; vibrational spectroscopy
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Breternitz, J.; Godula-Jopek, A.; Gregory, D.H. Ni(NH3)2(NO3)2—A 3-D Network through Bridging Nitrate Units Isolated from the Thermal Decomposition of Nickel Hexammine Dinitrate. Inorganics 2018, 6, 59.

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