Hexamminecobalt(III) chloride

Hexamminecobalt(III) chloride ;
Names:	hexamminecobalt(III) trichloride; cobalt hexammine chloride; cobalt hexammine trichloride;
Formula:	Co(NH3)6Cl3;
Molar mass:	267.477 g/mol;
Density:	1.71 g/cm3;
Crystal system:	monoclinic; a=12.461 Å, b=21.302 Å, c=12.741 Åα=90°, β=112.968°, γ=90°;
Color:	yellow; orange;
Melting point:	217 °C490.15 K <br />422.6 °F <br />882.27 °R <br />;
Stability:	stable;
Toxicity:	poisonous

Description

An unusual example of stable trivalent cobalt. Doesn't form water hydrates.

Precursors

Reaction between cobalt(II) chloride, ammonia, ammonium chloride and hydrogen peroxide

Chemical equation:

2CoCl₂ + 2NH₄Cl + 10NH₄OH + H₂O₂ = 2Co(NH₃)₆Cl₃ + 12H₂O

For preparation of 100.00g of hexamminecobalt(III) chloride а 88.95g of cobalt(II) chloride

hexahydratehexahydrate
anhydrous

, 65.51g of concentratedconcentrated ammonia, 20.00g of ammonium chloride and 6.36g of hydrogen peroxide is required.

Add to the flask with concentrated ammonia solution hydrogen peroxide and then add small parts of cobalt(II) and ammonium chloride solution with stirring until a precipitation forming will stop. After reaction will stop, filter the solution and use it for crystal growing.

Influence of pH level

Doesn't matter since Co-N bonds are too stable

Storage conditions

Keep in its original form or under several layers of varnish at average humidity and room temperature. Do not keep crystals near heaters.

Solubility

TableGraph

Temperature	g/`100,00` g water
20°C293.15 K <br />68 °F <br />527.67 °R <br />	`6.95`
50°C323.15 K <br />122 °F <br />581.67 °R <br />	`12.04`

Insoluble in ethanol.

Sources

G. J. Kruger, Hexamminecobalt(III) Chloride

Navigation

Ammines
Hexamminecobalt(III) chloride ([Co(NH₃)₆]Cl₂) • Hexaamminenickel chloride ([Ni(NH₃)₆]Cl₂) • Tetraamminecopper(II) sulfate ([Cu(NH₃)₄]SO₄)

Cobalt compounds
Salts	Cobalt(II) chloride (CoCl₂) • Cobalt(II) nitrate (Co(NO₃)₂) • Cobalt(II) oxalate (CoC₂O₄) • Cobalt(II) sulfate (CoSO₄) • Cobalt(II) tartrate (CoC₄H₄O₆)
Double salts	Cerium(III)-cobalt nitrate (3Co(NO₃)₂ · 2Ce(NO₃)₃) • Cerium(III)-cobalt-manganese nitrate (3(Co,Mn)(NO₃)₂ · 2Ce(NO₃)₃) • Cobalt(II)-ammonium sulfate ((NH₄)₂Co(SO₄)₂) • Cobalt(III)-ammonium sulfate (NH₄Co(SO₄)₂) • Cobalt(II)-potassium sulfate (K₂Co(SO₄)₂)
Complexes	Cyanocobalamin (C₆₃H₈₈CoN₁₄O₁₄P) • Hexamminecobalt(III) chloride ([Co(NH₃)₆]Cl₂) • Hexanitrocobaltates • Hexacyanocobaltates • Trioxalatocobaltates

Chlorides
Salts	Ammonium chloride (NH₄Cl) • Barium chloride (BaCl₂) • Calcium chloride (CaCl₂) • Cadmium chloride (CdCl₂) • Cobalt(II) chloride (CoCl₂) • Copper(II) chloride (CuCl₂) • Iron(II) chloride (FeCl₂) • Iron(III) chloride (FeCl₃) • Lead(II) chloride (PbCl) • Manganese(II) chloride (MnCl₂) • Potassium chloride (KCl) • Sodium chloride (NaCl) • Strontium chloride (SrCl₂) • Tin(II) chloride (SnCl₂) • Zirconyl chloride (ZrOCl₂)
Double salts	Rubidium-gold(III)-palladium(II) chloride (2RbCl · AuCl₃ · PdCl₂)
Adducts	Diglycine hydrochloride (2NH₂CH₂COOH · HCl) • Glutamic acid hydrochloride (C₅H₉NO₄ · HCl) • Glucose and sodium chloride complex (2C₆H₁₂O₆ · NaCl) • Hydroxylammonium chloride (NH₂OH · HCl) • P-nitroaniline hydrochloride (C₆H₆N₂O₂ · HCl) • Urea and sodium chloride complex (CO(NH₄)₂ · NaCl)
Complexes	Ammonium pentachloroferrate(III) ((NH₄)₂[FeCl₅]) • Ammonium tetrachlorocuprate(II) ((NH₄)₂[CuCl₄]) • Lithium trioxalatoferrate(III)-chloride (Li₄[Fe(C₂O₄)₃]Cl) • Hexamminecobalt(III) chloride ([Co(NH₃)₆]Cl₂) • Hexaamminenickel chloride ([Ni(NH₃)₆]Cl₂) • Potassium hexachlororhodate(III) (K₃[RhCl₆])

Hexamminecobalt(III) chloride
Names:	hexamminecobalt(III) trichloride cobalt hexammine chloride cobalt hexammine trichloride
Formula:	Co(NH₃)₆Cl₃
Molar mass:	267.477 g/mol
Density:	1.71 g/cm³
Crystal system:	monoclinic a=12.461 Å, b=21.302 Å, c=12.741 Åα=90°, β=112.968°, γ=90°
Color:	yellow orange
Melting point:	217 °C490.15 K <br />422.6 °F <br />882.27 °R <br />
Stability:	stable
Toxicity:	poisonous