The copper complexes of biuret have been synthesized by solid phase react ion with microwave irradiation. The compositions and structures of the complexes are characterized by elemental analysis, molar conductance, infrared spectra, e lectronic spectra, magnetic susceptibility, thermogravimetric and differential t hermal analysis, X-ray powder diffraction. The two complexes have the composit ions of Cl2(A) and (NO3)2(B)(bi=NH2CONHCONH2) and the molecula r formulae of CuC4H10O4N6Cl2 and CuC4H10O10N8, respectively. The molar conductan ce data show that the complexes are 1∶2 electrolyte. Infrared spectra of the c omplexes show oxygen atoms have been coordinated with divalent copper ion. The t hermal decomposition processes of the complexes show that the final residues are all cupper oxide. The results of indexes to the X-ray powder diffraction data indicate that the crystal structure of the complexes belong to monoclinic syste m, the lattice parameters are: a=0.6976nm,b=1.1546 nm,c=2.1689nm,a=96.80 1.7346nm3 for A; and a=0.7096nm,b=1.1359 nm,c=2.1002 nm,a=97.05nm3 for B, respectively.
