Compared to other types of acid reagents, cuprous chl […]
Compared to other types of acid reagents, cuprous chloride is easier to obtain and less toxic. Also, there are many oxidation states of copper, of which the important ones include +1, +2 and +3. Most of the properties of cuprous chloride are related to the above two points. According to the classification of soft and hard acid-base theory, cuprous chloride is a "soft acid", so it is easier to form stable complexes with other Lewis bases classified as "soft bases". The following is the reaction to cuprous chloride and triphenylphosphine:
CuCl + P (C6H5) 3 → [CuCl (P (C6H5) 3)] 4
CuCl is insoluble in water, but soluble in some specific solutions. It is added to the halide ion to form a complex ion, such as H3O + CuCl2 when dissolved in concentrated hydrochloric acid. The solution containing CN, S2O32 and NH3 can also dissolve CuCl.
The solution to CuCl in HCl or NH3 can absorb carbon monoxide to form a colorless complex, such as the dimer [CuCl (CO)] 2 with chlorine as a bridging ligand. Moreover, its hydrochloric acid solution can also react with acetylene to form [CuCl (C2H2)]. When using ammonia solution, explosive copper acetylene can be obtained. The complex about CuCl and olefin can be prepared by reducing CuCl2 with sulfur dioxide in the presence of an alcohol solution of olefin, in which the complex about cuprous chloride and a diene such as 1,5-cyclooctadiene is quite stable.