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Atomistry » Copper » Cuprous Compounds » Cuprous acetylide | ||
Atomistry » Copper » Cuprous Compounds » Cuprous acetylide » |
Cuprous acetylide, Cu2C2
The Cuprous acetylide, Cu2C2, is formed by the action of acetylene on an ammoniacal solution of cuprous chloride, or on a suspension of cuprous oxide in water. It is a brownish-red, amorphous substance, and explosive in the dry state. Prepared by the first method, it is associated with a molecule of water, which can be removed by drying over sulphuric acid. The presence of this water has been attributed to adsorption, and another explanation assumes the compound to have the formula CH≡CCu,CuOH. Cuprous acetylide forms complex derivatives with solutions of cuprous chloride and potassium chloride in hydrochloric acid. Among the examples of those described are the colourless 2CuCl,C2H2 and 4CuCl,KCl,C2H2; the yellow 8CuCl,2KCl,C2H2; and the violet 2CuCl,Cu2O,C2H2. Manchot found that excess of acetylene combines with cuprous chloride to form white crystals of the formula CuCl,C2H2. In presence of hydrochloric acid a dark-violet powder of the composition CuCl,C2Cu2,H2O is precipitated. In the dry state this substance is moderately stable. Acetylene combines with excess of cuprous chloride to form white prisms of the composition 2CuCl,C2H2.
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