1) Copper compound 
Cuprate loosely refers to a material that can be viewed as containing copper anions. Examples include tetrachlorocuprate ([CuCl4]2-), the superconductor YBa2Cu3O7, and the organocuprates ([Cu(CH3)2]-). The term cuprates derives from the Latin word for copper, cuprum. The term is mainly used in three contexts - oxide materials, anionic coordination...