![]() ![]() SO 2 may be prepared in situ from sodium bisulfite (NaHSO 3) or sodium metabisulfite (Na 2S 2O 5) and acid. 2 CuBr 2 + H 2O + SO 3 2- → 2 CuBr + SO 4 2- + 2 HBr Grignard reagents react similarly.Ĭopper(I) chloride may be prepared by the reduction of copper(II) salts such as CuSO 4 using sulfur dioxide or copper metal. Complexes with chelating alkenes such as 1,5-cyclooctadiene are particularly stable: ĬuCl reacts with organometallic compounds such as methyllithium (CH 3Li) to form " Gilman reagents" such as (CH 3) 2CuLi, which find extensive use in organic synthesis. ![]() Complexes of CuCl with alkenes can be made by reduction of CuCl 2 by sulfur dioxide in the presence of the alkene in alcohol solution. The same HCl solution can also react with acetylene gas to form, while an NH 3 solution of CuCl forms an explosive copper(I) acetylide with acetylene. Solutions of CuCl in HCl or NH 3 absorb carbon monoxide to form colourless complexes such as the crystalline halogen-bridged dimer 2. It also dissolves readily in solutions containing CN -, S 2O 3 2- or NH 3. It readily forms complexes with halide ions, for example forming H 3O + CuCl 2 - with concentrated hydrochloric acid. Thus, it tends to form stable complexes with soft Lewis bases such as triphenylphosphine:ĬuCl + PPh 3 → 4 (Ph = phenyl)Īlthough CuCl is insoluble in water, it dissolves in aqueous solutions containing suitable donor molecules. Copper(I) chloride is a Lewis acid, classified as soft according to the Hard-Soft Acid-Base concept. ![]()
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