Hexamminecobalt(III) chloride

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   Hexamminecobalt(III) chloride   
Names: hexamminecobalt(III) trichloride
cobalt hexammine chloride

Formula: Co(NH3)6Cl3
SMILES: [Cl-].[NH3+][Co-3]([NH3+])([NH3+])([NH3+])([NH3+])[NH3+].[Cl-].[Cl-]
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 hexahydrate, 65.51g of concentrated 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

Store in its original form or under several layers of varnish at average humidity and room temperature. Do not store in matchboxes or cotton wool and do not heat.

Solubility

Temperatureгр/100,00 гр 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


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   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(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])


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