Cobalt(III) nitrate

Cobalt(III) nitrate is an inorganic compound with the chemical formula Co(NO3)3.[1]

Cobalt(III) nitrate
Names
IUPAC name
Cobalt(III) nitrate
Identifiers
3D model (JSmol)
ChemSpider
Properties
Co(NO3)3
Molar mass 244.96 g/mol
Appearance green crystals
hygroscopic
Density 2.49 g/cm3
5.07 g/100 mL
Structure
cubic
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Properties

Cobalt(III) nitrate is a stable green crystalline solid,[2] that sublimates at ambient temperature.[3] It is soluble in chloroform.[4]

Structure

The molecular structure has three nitrate groups in bidentate coordination with the cobalt atom, which is thus bonded to six oxygen atoms in a distorted octahedral arrangement.[4] The nitrates are approximately planar, and lie on three mutually perpendicular planes, resulting in a chiral molecule. The Co-O bonds are about 190 pm long. The O-Co-O angles for the two oxygens in the same nitrate is about 68 degrees.[5] The same geometry seems to persist in carbon tetrachloride solution.[4]

Preparation

Cobalt(III) nitrate can be prepared by the reaction of dinitrogen pentoxide N
2O
5 with cobalt(III) fluoride CoF
3. [4] It can be purified by vacuum sublimation at 40 °C.[5][3]

Reactions

Cobalt(III) nitrate is soluble in water, giving a green solution that rapidly turns pink, with formation of cobalt(II) ions and release of oxygen.[2]

Cobalt(III) nitrate can be intercalated in graphite, in the ratio of 1 molecule for each 12 carbon atoms, by heating the two substances at 40 °C for 3 hours.[3]

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See also

References
  1. University of Akron Chemical Database Archived 2012-12-11 at Archive.today
  2. W. Levason and C. A. McAuliffe (1974): "Higher oxidation state chemistry of iron, cobalt, and nickel". Coordination Chemistry Reviews, volume 12, issue 2, pages 151-184. doi:10.1016/S0010-8545(00)82026-3
  3. E. Stumpp, G. Nietfeld, K. Steinwede, and K. D. Wageringel (1983): "Reaction of anhydrous metal nitrates with graphite". Synthetic Metals, Evolume 7, issues 1–2, pages 143-151. doi:10.1016/0379-6779(83)90097-8
  4. R. J. Fereday, N. Logan and D. Sutton (1969): "Anhydrous cobalt(III) nitrate: preparation, spectra, and reactions with some organic ligands". Journal of the Chemical Society A: Inorganic, Physical, Theoretical, volume 1969, issue 0, pages 2699-2703. doi:10.1039/J19690002699
  5. J. Hilton and S. C. Wallwork (1968): "The crystal structure of cobalt(III) nitrate", Chemical Communications (London), volume 1968, issue 15, pages 871-871. doi:10.1039/C19680000871
Salts and covalent derivatives of the nitrate ion
HNO3 He
LiNO3 Be(NO3)2 B(NO
3)−
4		 RONO2 NO−
3
NH4NO3		 HOONO2 FNO3 Ne
NaNO3 Mg(NO3)2 Al(NO3)3 Si P S ClONO2 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 Se Br Kr
RbNO3 Sr(NO3)2 Y(NO3)3 Zr(NO3)4 Nb Mo Tc Ru(NO3)3 Rh(NO3)3 Pd(NO3)2
Pd(NO3)4		 AgNO3
Ag(NO3)2		 Cd(NO3)2 In Sn Sb(NO3)3 Te I Xe(NO3)2
CsNO3 Ba(NO3)2   Hf Ta W Re Os Ir Pt(NO3)2
Pt(NO3)4		 Au(NO3)3 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   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 Lu(NO3)3
Ac(NO3)3 Th(NO3)4 PaO2(NO3)3 UO2(NO3)2 Np(NO3)4 Pu(NO3)4 Am(NO3)3 Cm(NO3)3 Bk Cf Es Fm Md No Lr


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