Cu2(OH)2CO3 + 6NH4Cl → [Cu(NH3)4]Cl2 + (NH4)2[CuCl4] + CO2 + 3H2O
Copper dihydroxide-carbonate react with ammonium chloride to produce tetraamminecopper(II) chloride, ammonium tetrachloridocuprate(II), carbon dioxide and water. Ammonium chloride in excess.