Editing Copper(II) nitrate (section)

===Anhydrous copper(II) nitrate ===
Anhydrous {{chem2|Cu(NO3)2}} is one of the few anhydrous transition metal nitrates.<ref>{{cite journal |doi=10.1039/qr9712500289 |title=Structural Aspects of Co-ordinated Nitrate Groups |year=1971 |last1=Addison |first1=C. C. |last2=Logan |first2=N. |last3=Wallwork |first3=S. C. |last4=Garner |first4=C. D. |journal=Quarterly Reviews, Chemical Society |volume=25 |issue=2 |page=289}}</ref> It cannot be prepared by reactions containing or producing water. Instead, anhydrous {{chem2|Cu(NO3)2}} forms when copper metal is treated with [[dinitrogen tetroxide]]:<ref name="G&E" />

:{{chem2|Cu + 2 N2O4 -> Cu(NO3)2 + 2 NO}}