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Mercury(I) nitrate

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Mercury(I) nitrate
Names
IUPAC name Mercury(I) nitrate
Other names Mercurous nitrate
Identifiers
CAS Number
3D model (JSmol)
ECHA InfoCard 100.202.814 Edit this at Wikidata
EC Number
  • 233-886-4
PubChem CID
UNII
CompTox Dashboard (EPA)
InChI
  • InChI=1S/Hg.NO3/c;2-1(3)4/q+1;-1Key: DRXYRSRECMWYAV-UHFFFAOYSA-N
SMILES
  • anhydrous: (=O)()..(=O)()
  • dihydrate: (=O)()..(=O)()
Properties
Chemical formula Hg2(NO3)2 (anhydrous)
Hg2(NO3)2·2H2O (dihydrate)
Molar mass 525.19 g/mol (anhydrous)
561.22 g/mol (dihydrate)
Appearance white monoclinic crystals (anhydrous)
colorless crystals (dihydrate)
Density ? g/cm (anhydrous)
4.8 g/cm (dihydrate)
Melting point ? (anhydrous)
decomposes at 70 °C (dihydrate)
Solubility in water slightly soluble, reacts
Magnetic susceptibility (χ) −27.95·10 cm/mol
Hazards
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g. canola oilInstability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazard OX: Oxidizer. E.g. potassium perchlorate
3 1 1OX
Related compounds
Other anions Mercury(I) fluoride
Mercury(I) chloride
Mercury(I) bromide
Mercury(I) iodide
Other cations Mercury(II) nitrate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). ☒N verify (what is  ?) Infobox references
Chemical compound

Mercury(I) nitrate is an inorganic compound, a salt of mercury and nitric acid with the formula Hg2(NO3)2. A yellow solid, the compound is used as a precursor to other Hg2 complexes. The structure of the hydrate has been determined by X-ray crystallography. It consists of a center, with a Hg-Hg distance of 254 pm.

Reactions

Mercury(I) nitrate is formed when elemental mercury is combined with dilute nitric acid (concentrated nitric acid will yield mercury(II) nitrate). Mercury(I) nitrate is a reducing agent which is oxidized upon contact with air.

Mercuric (II) nitrate reacts with elemental mercury (0) to form mercurous (I) nitrate (comproportionation reaction):

Hg(NO3)2 + Hg ⇌ Hg2(NO3)2

Solutions of mercury(I) nitrate are acidic due to slow reaction with water:

Hg2(NO3)2 + H2O ⇌ Hg2(NO3)(OH) + HNO3

Hg2(NO3)(OH) forms a yellow precipitate.

If the solution is boiled, or exposed to light, mercury(I) nitrate undergoes a disproportionation reaction yielding elemental mercury and mercury(II) nitrate:

Hg2(NO3)2 ⇌ Hg + Hg(NO3)2

These reactions are reversible; the nitric acid formed can redissolve the basic salt.

References

  1. Lide, David R. (1998), Handbook of Chemistry and Physics (87 ed.), Boca Raton, Florida: CRC Press, pp. 4–45, ISBN 0-8493-0594-2
  2. D. Grdenić (1956). "The crystal Structure of Mercurous Nitrate Dihydrate". Journal of the Chemical Society: 1312–1316. doi:10.1039/jr9560001312.
  3. Patnaik, Pradyot (2003), Handbook of Inorganic Chemical Compounds, McGraw-Hill Professional, p. 573, ISBN 0-07-049439-8, retrieved 2009-07-20
Mercury compounds
Mercury(I)
Mercury(II)
Organomercury
compounds
Mercury(IV)
Amalgams
Mercury cations
Salts and covalent derivatives of the nitrate ion
HNO3 He
LiNO3 Be(NO3)2 B(NO3)−4 RONO2
+CO3
+C2O4 		NO3
NH4NO3 		HOONO2 FNO3
+F 		Ne
NaNO3 Mg(NO3)2 Al(NO3)3
Al(NO3)−4 		Si P +SO4 ClONO2
+Cl 		Ar
KNO3 Ca(NO3)2 Sc(NO3)3 Ti(NO3)4 VO(NO3)3 Cr(NO3)3 Mn(NO3)2 Fe(NO3)2
Fe(NO3)3 		Co(NO3)2
Co(NO3)3 		Ni(NO3)2 CuNO3
Cu(NO3)2 		Zn(NO3)2 Ga(NO3)3 Ge As +SeO3 BrNO3
+Br 		Kr
RbNO3 Sr(NO3)2 Y(NO3)3 Zr(NO3)4 NbO(NO3)3 MoO2(NO3)2 Tc Ru Rh(NO3)3 Pd(NO3)2 AgNO3 Cd(NO3)2 In(NO3)3 Sn(NO3)4 Sb4O4(OH)2(NO3)2 Te INO3
+IO3 		Xe(NO3)2
CsNO3 Ba(NO3)2 * Lu(NO3)3 Hf(NO3)4 TaO(NO3)3 WO2(NO3)2 ReO3NO3 Os Ir3O(NO3)10 Pt Au(NO3)−4 Hg2(NO3)2
Hg(NO3)2 		TlNO3
Tl(NO3)3 		Pb(NO3)2 Bi(NO3)3
BiO(NO3) 		Po(NO3)4 At Rn
FrNO3 Ra(NO3)2 ** Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
 
* La(NO3)3 Ce(NO3)3
Ce(NO3)4 		Pr(NO3)3 Nd(NO3)3 Pm(NO3)3 Sm(NO3)3 Eu(NO3)3 Gd(NO3)3 Tb(NO3)3 Dy(NO3)3 Ho(NO3)3 Er(NO3)3 Tm(NO3)3 Yb(NO3)3
** Ac(NO3)3 Th(NO3)4 PaO(NO3)3 UO2(NO3)2 Np(NO3)4 Pu(NO3)4 Am(NO3)3 Cm(NO3)3 Bk(NO3)3 Cf(NO3)3 Es Fm Md No


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