Syntheses, crystal structures and antibacterial activities of [Cu_2(C_(11)H_(11)NO_5S)_2(H_2O)_4 centre dot 5H_2O and [Ni_2(C_(11)H_(11)NO_5S)_2(H_2O)_4] centre dot 2H_2O

摘要

The binuclear complexes [Cu_2L_2(H_2O)_4] centre dot 5H_2O (1) and [Ni_2L_2(H_2O)_4] centre dot 2H_2O (2) (where L = C_(11) H_(11)NO_5S, H_2L = 2-[(3-fonnyl-5-methyl-2-hydroxy-benzylidene)-amino]ethanesulfonic acid) have been synthesized and characterized by IR, elemental analysis and X-ray diffraction. The crystals belong to the monoclinic system, space group P2_1/c. Complex 1: a= 16.8902(12), b=11.2829(6), c = 17.4249(11) A; beta= 106.709(4) deg; S=1.131; V = 3180.5(3)A~3; Z = 4; D_(Calcd) = l.729 g cm~(3-); F(000)= 1712; mu = 1.554mm~(-1); R_1 =0.0519, wR_2 = 0.1349; complex 2: a= 11.399(2), b=19.985(3), c= 7.3694(10)A; beta = 108.664(7) deg; S=1.157; V= 1590.6(4)A~3; Z = 2; D_(Calcd)=1.604g cm~(3-); F(000) = 800; mu= 1.388mm~(-1); R_1 =0.1859, wR_2 = 0.4346. The geometry around each metal(II) center can be described as slightly distorted octahedral. Water-sulfonic clusters and (H_2O)_4 water clusters can be observed for 1 from the crystal packing diagram, while cavity and offset face-to-face pi-pi stacking can be observed for 2. The complexes have been tested for the antibacterial activities which show antibacterial activities of 1 for beta-hemolytic streptococcus, Staphylococcus aureus and Escherichia coli, and the antibacterial activity of 2 only for beta-hemolytic streptococcus.