title: Syntheses, crystal structure, spectroscopic characterization and antifungal activity of new N-R-sulfonyldithiocarbimate metal complexes.
abstract: Five new compounds with the general formula of (Bu(4)N)(2)[M(RSO(2)NCS(2))(2)], where Bu(4)N=tetrabutylammonium cation, (M=Ni, R=4-FC(6)H(4)) (1), (M=Zn, R=4-FC(6)H(4), 4-ClC(6)H(4), 4-BrC(6)H(4), 4-IC(6)H(4)), (2), (3), (4) and (5), respectively, were obtained by the reaction of the appropriate potassium N-R-sulfonyldithiocarbimate (RSO(2)N=CS(2)K(2)) with nickel(II) chloride hexahydrate or zinc(II) acetate dihydrate in metanol:water 1:1. The elemental analyses and the IR data are consistent with the formation of the expected bis(dithiocarbimato)metal(II) complexes. The (1)H and (13)C NMR spectra showed the signals for the tetrabutylammonium cation and the dithiocarbimate moieties. The compounds 1, 2 and 5 were also characterized by X-ray diffraction techniques. The nickel(II) is coordinated by two N-4-fluorophenylsulphonyldithiocarbimato(2-) ligands forming a planar coordination. The zinc(II) exhibits distorted tetrahedral configuration in compounds 2 and 5 due to the chelation effect of two sulfur atoms of the N-R-sulfonyldithiocarbimate ligands. The antifungal activities of the compounds were tested in vitro against Colletotrichum gloeosporioides, an important fungus that causes the plant disease known as anthracnose in fruit trees. All the complexes were active.
authors.affiliation: Departamento de Química, Universidade Federal de Viçosa, Viçosa MG, Brazil.
authors.forename: Leandro C
authors.initials: LC
authors.lastname: Alves
authors.forename: Mayura M M
authors.initials: MM
authors.lastname: Rubinger
authors.forename: Renata H
authors.initials: RH
authors.lastname: Lindemann
authors.forename: Genivaldo J
authors.initials: GJ
authors.lastname: Perpétuo
authors.forename: Jan
authors.initials: J
authors.lastname: Janczak
authors.forename: Liany D L
authors.initials: LD
authors.lastname: Miranda
authors.forename: Laércio
authors.initials: L
authors.lastname: Zambolim
authors.forename: Marcelo R L
authors.initials: MR
authors.lastname: Oliveira
mesh_terms: D000935:Antifungal Agents / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D020231:Colletotrichum / Q000187:drug effects; D018360:Crystallography, X-Ray; D015394:Molecular Structure; D009532:Nickel / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D014961:X-Ray Diffraction; D015032:Zinc / Q000737:chemistry*
chemical_list: D000935:Antifungal Agents; D009942:Organometallic Compounds; D009532:Nickel; D015032:Zinc