Cadmium(II) compounds of the bis-cyanoethyl derivative (L) of Me[14]aneC (L): characterization and antibacterial studies.

The isomeric ligand L, a saturated analogue of 2,9-C-meso-Me[14]diene, on reflux with excess acrylonitrile afforded 1,8-N-pendant cyanoethyl derivative L. Interaction of L with cadmium(II) perchlorate, nitrate, acetate, and chloride salts produced six coordinated octahedral compounds, [Cd(L) (ClO)]∙2HO, [Cd(L) (NO)], [Cd(L) (CHCOO)], and [Cd(L)Cl], respectively. Further, axial substitution reactions between [Cd(L) (ClO)]∙2HO and KI, KBr, KCl, KSCN, and NaNO in a 1:2 ratio yielded six coordinated octahedral compounds, [Cd(L)I]∙HO, [Cd(L)Br]∙2HO, [Cd(L)Cl(ClO)]∙2HO, [Cd(L) (NCS)]∙HO, and [Cd(L) (NO) (ClO)]∙2HO, respectively. All of the newly prepared compounds have been characterized by analytical, spectroscopic, molar conductivity, and magnetochemical data. The crystal structure of the ligand L was determined by x-ray crystallography which showed the 14-membered ring to adopt an extended chair conformation. Antibacterial activities of the newly formed cadmium(II) complexes against selected bacteria showed these to exhibit moderate and selective activity with - and exhibiting greatest potency against the gram negative bacterium , and , , and against the gram positive bacterium .