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    Home > Chemicals Industry > Chemical Technology > Compounds of monovalent copper

    Compounds of monovalent copper

    • Last Update: 2021-06-30
    • Source: Internet
    • Author: User
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    1.
    Cuprous oxide

    The reduction of Cu(Ⅱ) solution with glucose in alkaline medium can easily get red Cu 2 O precipitation
    .


    This reaction is used in medicine to detect sugar in urine samples


    Cu 2 O can also be obtained by the decomposition of CuO at high temperature
    .


    Cu 2 O has high thermal stability and melts at 1244°C but does not decompose


    Cu 2 O+2H + =Cu+Cu 2+ +H 2 O

    Cu 2 O dissolves in ammonia water to generate colorless complex ions.
    Due to the oxidation of oxygen in ammonia water , Cu 2 O dissolves in ammonia water to obtain a blue [Cu(NH 3 ) 4 ] 2+ solution
    .



    2.


    Halides and sulfides

    CuCl, CuBr, and Cul are all white insoluble compounds with successively reduced solubility, which can be obtained by the reduction of +2 valent copper ions in the presence of corresponding halide ions
    .



    It was diluted with water [CuCl 2 ] - solution, resulting precipitate insoluble CuCl
    .


    Using reducing agents such as SnCl 2 and Na 2 SO 3 to react with copper halide can also obtain cuprous halide


    CuCl is dissolved in ammonia, concentrated hydrochloric acid and alkali metal chloride solution to form coordination compounds
    .

    Cuprous sulfide Cu 2 S, black, hardly soluble in water, soluble in hot concentrated nitric acid or CN - solution
    .



    3.


    Coordination Compound

    Due to the different ligand concentration, Cu + and the single-base ligand form a coordination compound with a coordination number of 2 to 4.


    These complex ions are colorless, such as [Cu(NH 3 ) 2 ] + , [Cu(NH 3 ) 3 ] + , [Cu(NH 3 ) 4 ] + , [CuCl 2 ] - , [CuCl 3 ] 2- , [CuCl4]3-, [Cu(CN) 2 ] - , [Cu(CN) 3 ] 2- , [a Cu (the CN) .
    4
    ] 3- and the like


    [Cu(NH 3 ) 2 ] + is unstable and will be oxidized to dark blue [Cu(NH 3 ) 4 ] 2+ when it encounters air .
    This property can remove trace O 2 in the gas
    .
    The complex formed by Cu + and Cl - or CN - is stable in the air
    .

    [Cu(NH 3 ) 2 ] + can absorb CO gas
    .

     

     

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