Cu(oh)2 -CH3COOH- CH3COOC2H5-c2H5OH
2Cu(OH)2+CH3CHO=CH3COOH+Cu2O+2H2O CH3COOH+C2H5OH(H+)=CH3COOC2H5+H2O CH3COOC2H5+H2O(H+)=C2H5OH+CH3COOH