Tetra ammine copper(II) sulphate is the salt with the formula [Cu(NH3)4]SO4·H2O. This dark blue to purple solid is a salt of the metal complex [Cu(NH3)4(H2O)]2+. It is closely related to Schweizer's reagent, which is used for the production of cellulose fibers in the production of rayon.
The deep blue crystalline solid tends to hydrolyse and evolve (release) ammonia upon standing in air.[1] It is fairly soluble in water. The brilliant dark blue-violet color of tetraamminecopper(II) sulfate solution is due to presence of [Cu(NH3)4]2+. Often, the dark blue-violet color is used as a positive test to verify the presence of Cu2+ in a solution.
Structure and propertiesedit
The solid state structure of tetraamminecopper(II) sulfate monohydrate confirms that the compound is a salt. The complex cation is [Cu(NH3)4(H2O)]2+, which has a square pyramidal geometry. The Cu-N and Cu-O bond length are about 210 and 233 pm, respectively, as determined by X-ray crystallography.[2] The correct concentrations of ammonia and copper sulfate solution needed to synthesize the complex can be determined by colorimetry. The combination of the correct concentrations will produce the highest absorbance read out on the colorimeter and as a result the formula of the complex can be verified.
Corrosionedit
The characteristic deep blue colour of the tetraammine complex is found in brass and copper alloys where attack from ammonia has occurred, leading to cracking. The problem was first found in ammunition cartridge cases when they were stored near animal waste, which produced trace amounts of ammonia. This type of corrosion is known as season cracking.
^ abcEditor G.Brauer "Tetraamminecopper (II) Sulfate" Handbook of Preparative Inorganic Chemistry, 2nd Ed., Academic Press, 1965, New York. Vol. 2. p. 1021.
^B. Morosin (1969). "The Crystal Structures of Copper Tetraammine Complexes. A. Cu(NH3)4SO4.H2O and Cu(NH3)4SeO4". Acta Crystallographica. B25: 19–30. doi:10.1107/S0567740869001725.
January 04, 2024
tetraamminecopper, sulfate, tetra, ammine, copper, sulphate, salt, with, formula, this, dark, blue, purple, solid, salt, metal, complex, closely, related, schweizer, reagent, which, used, production, cellulose, fibers, production, rayon, namesiupac, name, mono. Tetra ammine copper II sulphate is the salt with the formula Cu NH3 4 SO4 H2O This dark blue to purple solid is a salt of the metal complex Cu NH3 4 H2O 2 It is closely related to Schweizer s reagent which is used for the production of cellulose fibers in the production of rayon Tetraamminecopper II sulfate NamesIUPAC name Tetraamminecopper II sulfate monohydrateOther names cuprammonium II sulfate cupric sulfate ammoniatedIdentifiersCAS Number 14283 05 7 Y3D model JSmol Interactive imageECHA InfoCard 100 155 305PubChem CID 61513UNII YMW7182547 YCompTox Dashboard EPA DTXSID70908605SMILES OH2 Cu 3 NH3 NH3 NH3 NH3 O S 2 O O O PropertiesChemical formula Cu NH3 4 SO4 H2OMolar mass 245 79 g mol monohydrate Appearance dark blue purple solution or crystalsOdor AmmoniaDensity 1 81 g cm3Boiling point 330 C 626 F 603 K Solubility in water 18 5 g 100 g 21 5 C 1 Except where otherwise noted data are given for materials in their standard state at 25 C 77 F 100 kPa Y verify what is Y N Infobox references Tetraaminecopper II sulphate milledAnalogous compound with different anion tetraamminecopper II iodide Contents 1 Synthesis 2 Chemical reaction and solubility 3 Structure and properties 4 Corrosion 5 Uses 6 ReferencesSynthesis editThis compound can be prepared by adding concentrated solution of ammonia to a saturated aqueous solution of copper sulfate pentahydrate followed by precipitation of the product with ethanol or isopropanol 1 4 NH3 CuSO4 5H2O Cu NH3 4 SO4 H2O 4 H2OChemical reaction and solubility editThe deep blue crystalline solid tends to hydrolyse and evolve release ammonia upon standing in air 1 It is fairly soluble in water The brilliant dark blue violet color of tetraamminecopper II sulfate solution is due to presence of Cu NH3 4 2 Often the dark blue violet color is used as a positive test to verify the presence of Cu2 in a solution Structure and properties editThe solid state structure of tetraamminecopper II sulfate monohydrate confirms that the compound is a salt The complex cation is Cu NH3 4 H2O 2 which has a square pyramidal geometry The Cu N and Cu O bond length are about 210 and 233 pm respectively as determined by X ray crystallography 2 The correct concentrations of ammonia and copper sulfate solution needed to synthesize the complex can be determined by colorimetry The combination of the correct concentrations will produce the highest absorbance read out on the colorimeter and as a result the formula of the complex can be verified Corrosion editThe characteristic deep blue colour of the tetraammine complex is found in brass and copper alloys where attack from ammonia has occurred leading to cracking The problem was first found in ammunition cartridge cases when they were stored near animal waste which produced trace amounts of ammonia This type of corrosion is known as season cracking Uses editThe closely related Schweizer s reagent is used for the production of cuprammonium rayon References edit a b c Editor G Brauer Tetraamminecopper II Sulfate Handbook of Preparative Inorganic Chemistry 2nd Ed Academic Press 1965 New York Vol 2 p 1021 B Morosin 1969 The Crystal Structures of Copper Tetraammine Complexes A Cu NH3 4SO4 H2O and Cu NH3 4SeO4 Acta Crystallographica B25 19 30 doi 10 1107 S0567740869001725 Retrieved from https en wikipedia org w index php title Tetraamminecopper II sulfate amp oldid 1187021090, wikipedia, wiki, book, books, library,
