Synthesis, Structure and Antimicrobial Activity of a Cyclic Compound [Cu(Pmal)(Dadm)(H2O)]2·4H2O

A new copper compound constructed from H2 Pmal (phenylmalonic acid), Dadm (4,4-diaminodiphenylmethane) and Cu(Ⅱ) has been synthesized from H2O-EtOH-DMF solution, and is characterized by X-ray single-crystal diffraction and other measurements. The compound crystallizes in the monoclinic system, space group C2/c with a=13.7866(6), b=10.1557(4), c=30.9036(17), β=101.422(5)o, V=4241.2(3)3 , Z=4, Dc=1.547g/cm3 , Mr=987.94, F(000)=2056, μ(MoKα)=1.078 mm-1 , S=1.007, R=0.0453 and wR=0.987 for 2806 observed reflections (I>2σ (I)). The title compound is characteristic of the cyclic dimeric molecules which further aggregate through hydrogen bonds and π-π interactions to form a 3-D supramolecular network. The microbial activities of the title compound and its reagents are investigated with filter paper discs diffusion method. The results show that the activity of the title compound is slightly better than its precursor reagents.