# Nitrate nitrite

A nitrate nitrite, or nitrite nitrate, is a coordination complex or other chemical compound that contains both nitrite (NO−2) and nitrate (NO−3) anions. They are mixed-anion compounds, and they are mixed-valence compounds. Some have third anions. Many nitrite nitrate compounds are coordination complexes of cobalt. Such a substance was discovered by Wolcott Gibbs and Frederick Genth in 1857.

## Production

Mercury(II) nitrate and potassium nitrate in water solution produce the salt tripotassium tetranitratomercurate(II) nitrate K$_3$[Hg(NO$_2$)$_4$]NO$_3$.

## Properties

On heating, nitrate nitrites lose NO$_2$ and NO and yield metal oxides.

## Related

Other compounds having an element in two different anion states include the sulfate sulfites, the phosphate phosphites, arsenate arsenites and the selenate selenites.

## List

| name | formula | ratio NO$_3$:NO$_2$ | mw | system | space group | unit cell Å | volume | density | properties |
| | [Cr(NH$_3$)$_5$(NO$_2$)] ·(NO$_3$)$_2$ | | | | | | | | |
| trans-dinitrotetraamminecobalt(III) nitrate monohydrate | [Co(NO$_2$)$_2$(NH$_3$)$_4$]NO$_3$•H$_2$O | 1:2 | | orthorhombic | P2$_1$2$_1$2$_1$ | a=10.02, b=6.02, c=16.84, Z=4 | | 1.84 | |
| cis-dinitrotetraamminecobalt(III) nitrate | [Co(NO$_2$)$_2$(NH$_3$)$_4$]NO$_3$ | 1:2 | | orthorhombic | P2$_1$2$_1$2$_1$ | a=12.19, b=7.18, c=10.92, Z=4 | | 1.95 | |
| | [cis-β-Co(trien)(NO$_2$)$_2$]NO$_3$ | 1:2 | | monoclinic | P2$_1$/n | a = 7.604, b = 13.019, c = 14.472, β = 98.13°, Z = 4 | 1418.26 | 1.682 | racemate |
| | [cis-α-Co(tren)(NO$_2$)$_2$]NO$_3$•13H$_2$O | 1:2 | | | P2$_1$/c | | | | |
| | trans-Co[(en$_2$)(NO$_2$)$_2$]NO$_3$ | 1:2 | | | | | | | |
| | trans-[Co(2,3,2-tet)(NO$_2$)$_2$]NO$_3$ | 1:2 | 373.21 | | P2$_1$/n | a=8.490, b=8.884, c=18.580 and β=95.08°;, Z=4 | 1395.89 | 1.776 | |
| | trans-[Co(2,3,2-tet)(NO$_2$)$_2$]NO$_3$ | | 373.21 | | Pn | a=6.493, b=11.731, c=9.325 β=100.13°; M.W.=373.21, Z=2)= | 699.21 | 1.773 | |
| | cis-[Co(Hao)$_2$(NO$_2$)$_2$]NO$_3$ (Hao = 3-amino-3-methyl-2-butanone oxime) | | | monoclinic | P2$_1$/n | a= 8.1 60, b= 17.250, c= 13.745, β= 104.77° | | | |
| | [Co(pic)$_{2$NO$_2$)$_2$]NO$_3$.½H$_2$O pic=2-picolylamine | | | | | | | | |
| | cis-[Co(phen)$_2$(NO$_2$)$_2$]NO$_3$ · 2 H$_2$O phen=1,10-phenanthroline | | | | | | | | |
| Sparteine copper(II) nitrate nitrite | Cu(C$_{15}$H$_{26}$N$_2$)(NO$_3$)(NO$_2$) | 1:1 | | | | | | | green |
| trans-diammine-cis-dinitratonitronitrosyl ruthenium(II) | RuNO(NH$_3$)$_2$(NO$_3$)$_2$(NO$_2$) | | | | | | | | |
| bis(nitrotriamminepalladium(II)) tetraamminepalladium(II) tetranitrate | [Pd(NO$_2$)(NH$_3$)$_3$]$_2$[Pd(NH$_3$)$_4$](NO$_3$)$_4$ | 4:1 | 829.20 | tetragonal | I42m | a=7.637 c=21.610 Z=2 | | 2.18 | bright yellow |
| bis(1,10-Phenanthroline)-(nitroso-O)-(nitrato-O,O')-cadmium(ii) | Cd(phen)$_2$(NO$_3$)(NO$_2$) | | | monoclinic | P2$_1$/c | a 6.872 b 9.690 c 20.852 β 93.59° | | | |
| catena-((μ$_2$-Nitroso-O,O')-aqua-(nitrato-O,O')-(1,10-phenanthroline)-cadmium(ii)) | [Cd(phen)(NO$_3$)(NO$_2$)(H$_2$O)]$_n$ | | | monoclinic | Cc | a 11.703Å b 15.242 c 13.451 β 106.321° | | | |
| | [NO$_2$(NH$_3$)$_2$Pt(C$_5$H$_4$NO)$_2$Pt(NH$_3$)$_2$NO$_2$](NO$_3$)$_2$.H$_2$O | | | | | | | | yellow |
| | K$_3$[Hg(NO$_2$)$_4$]NO$_3$ | 1:4 | | orthorhombic | Pnma | a=12.12 b=10.58 c=9.28 Z=4 | | 3.14 | pale yellow |
| | Pb$_2$(NO$_2$)(NO$_3$)(SeO$_3$) | 1:1 | | orthorhombic | Pmn2$_1$ | a=5.529, b=10.357, c=6.811, Z=2 | 390 | | colourless |
| | K$_2$Pb(NO$_2$)$_3$(NO$_3$) | 1:3 | 503.4 | orthorhombic | Pbca | a = 6.766, b = 11.999, c = 26.61, Z = 8 | 2160 | 3.095 | yellow orange |
| | [Pb$_3$(OH)$_4$Co(NO$_2$)$_3$](NO$_3$)(NO$_2$)·2H$_2$O | 1:4 | | orthorhombic | Pbca | a = 8.9414, b = 14.5330, c = 24.9383, Z = 8 | 3240.6 | | |