Four pyrimidine derivatives and six corresponding complexes with Cu（Ⅱ） and Zn（Ⅱ） were synthesized and characterized by elemental analysis, thermoanalysis, IR, UV spectra and molar conductivity measurements. Preliminary biological tests showed that complexes 1（CuL2Cl2（R=CH3）） and 5（ZnL2Cl2（R=n-C3H7）） exhibited a certain weeding activity against wheat and barnyard grass.
