Syntheses and Crystal Structures of 3,5-Diiodo-salicylalidehyde and 3,5-Diiodo-salicylalidene-4-nitroaniline

The title compounds,C7H4I2O2 1 and C13H7I2N2O3 2,have been synthesized and characterized by single-crystal X-ray diffraction.Compound 1 crystallizes in monoclinic,space group P21/c with a=9.802(2),b=13.867(3),c=7.364(2)(A),β=109.74(3)°.V=942.1(3)(A)3,Dc=2.636 g/cm3,C7H4I2O2,Mr=373.90,F(000)=672,μ=6.627 mm-1,Z=4,R=0.0459 and wR=0.1018 for 1805 observed reflections(I>2σ(I)).Compound 2 belongs to the monoclinic system,space group P21/n with a=9.015(2),b=12.024(2),c=14.072(3)(A),β=103.91(3)°,V=1480.6(5)(A)3,Dc=2.216 g/cm3,C13H7I2N2O3,Mr=494.01,F(000)=920,μ=4.255 mm-1,Z=4,R=0.0777 and wR=0.1757 for 2896 observed reflections(I>2σ(I).Compounds 1 and 2 were assayed for antibacterial activities against three Gram positive bacterial strains(B.subtilis,s.aureus and s.faecalis)and three Gram negative bacterial strains(E coli,P.aeruginosa and E cloacae)by MTT method.Fortunately,compound 2 is found to show potent antibacterial activity against these six bacterial strains.