Spectroscopic properties and antimicrobial activity of dioxomolybdenum(VI) complexes with heterocyclic S,S’-ligands

Journal of the Serbian Chemical Society

关键词: dithiocarbamates;    molybdenum(VI) complexes;    MoO22+ group;    geometry optimization;   

DOI  :  10.2298/JSC110328160S

来源: DOAJ

【 摘 要 】

Five new dioxomolybdenum(VI) complexes of the general formula[MoO2(Rdtc)2],1-5, where Rdtc-refer to piperidine- (Pipdtc), 4-morpholine-(Morphdtc),4-thiomorpholine-(Timdtc), piperazine- (Pzdtc) or Nmethylpiperazine-(N-Mepzdtc) dithiocarbamates, respectively, have been prepared. Elementalanalysis, conductometric measurements, electronic, IR and NMR spectroscopyhave been employed to characterize them. Complexes 1-5 contain a cis-MoO2group and are of an octahedral geometry. Two dithiocarbamato ions join asbidentates with both the sulphur atoms to the molybdenum atom. The presenceof different heteroatom in the piperidinо moiety influences the v(C----N) andv(C----S) vibrations, which decrease in the order of the complexes with:Pipdtc > N-Mepipdtc > Morphdtc > Pzdtc > Timdtc ligands. On the basis ofspectral data, molecular structures of complexes 1-5 were optimized onsemiempirical molecular-orbital level, and the geometries, as obtained fromcalculations, described. Antimicrobial activity was tested against ninedifferent laboratory control strains of bacteria and two strains of yeastCandida albicans. All tested strains were sensitive. Complexes bearingheteroatom in position 4 of piperidine moiety are significantly more potentagainst bacteria tested comparing to corresponding ligands.

【 授权许可】

Unknown