25 research outputs found
Bis(tetraphenylphosphonium) bis[N-(octylsulfonyl)dithiocarbimato(2–)-κ2 S,S′]nickelate(II)
The Ni atom in the title complex, (C24H20P)2[Ni(C9H17NO2S3)2], lies on a twofold axis within a square-planar geometry defined by four S atoms derived from two dithiocarbimate dianions, each forming a four-membered chelate ring. A small distortion, described by a deviation of the NiII atom by 0.083 (1) Å from the plane through the four S atoms, and also by the torsion angles about the Ni—S bonds, implies a folded conformation for the chelate ring
Bis(tetraphenylphosphonium) bis[N-(trifluoromethylsulfonyl)dithiocarbimato(2−)-κ2 S,S′]zincate(II)
The title salt, (C24H20P)2[Zn(C2F3NO2S3)2], consists of a complex dianion and two tetraphenylphosphonium cations. The ZnII ion displays a distorted tetrahedral coordination environment with four S atoms from two S,S′-chelated N-(trifluoromethylsulfonyl)dithiocarbimate anions. In the crystal, besides the ionic interaction of the oppositely charged ions, intermolecular C—H⋯O interactions between cations and anions are observed. One of the cations interacts with an inversion-related equivalent by π–π stacking between phenyl rings, with a centroid–centroid distance of 3.932 (4) Å
Syntheses and characterization of novel heteroleptic nickel complexes with dithiocarbimates and trithiocarbimates
The potassium N-R-sulfonyldithiocarbimates, K2(RSO2NCS2) [R = CH3 (1a), CH3CH2 (1b), C6H5 (1c), 2-CH3C6H4 (1d) and 4-CH3C6H4 (1e)], reacted with nickel sulfate or zinc acetate to yield complex anions which were isolated as their tetraphenylphosphonium salts with the formulae (PPh4)2[M(RSO2NCS2)2], were M = Ni (2a–2e) and M = Zn (3a–3e). The compounds 3a–3e readily react with sulfur in dimethylformamide producing bis(trithiocarbimato)-zinc complexes (4a–4e) with the formula (PPh4)2[Zn(RSO2NCS3)2]. Mixed nickel complexes (5a–5e), (PPh4)2[Ni(RSO2NCS2)(RSO2NCS3)], were obtained from the zinc compounds 4a–4e by reaction with nickel sulfate in dimethylsulfoxide. The complexes 5a–5e are the first examples of N-R-sulfonyldithiocarbimate and N-R-sulfonyltrithiocarbimate heteroleptic nickel complexes. The structures of 5a and 5e were determined by X-ray crystallography. Both compounds crystallize in the centrosymmetric space group of the triclinic system. The Ni2+ cation is S,S-chelated by one dithio- and one trithiocarbimate ligands, forming distorted square-planar configurations. The square planar geometry around the nickel atom was confirmed for compounds 5a–5e by electronic, vibrational and nuclear magnetic resonance spectroscopies. High-resolution mass spectrometry and elemental analyses confirmed the molecular formulae
Syntheses, characterization and antifungal activity of tris(1,10-phenanthroline)iron(ii) bis(n-r-sulfonyldithiocarbimate)zincate(ii)
Four new compounds with the general formula [Fe(phen)3][Zn(RSO2N=CS2)2], where phen = 1,10-phenanthroline, R = 4-FC6H4 (1), 4-ClC6H4 (2), 4-BrC6H4 (3) and 4-IC6H4 (4), respectively, were obtained by the reaction of the appropriate potassium N-R-sulfonyldithiocarbimate (RSO2N=CS2K2) and tris(1,10-phenanthroline)iron(II) sulfate, with zinc(II) acetate dihydrate in dimethylformamide. The elemental analyses and the IR data were consistent with the formation of the expected complexes salts. The ¹H and 13C NMR spectra showed the signals for the cationic iron(II) complex and dithiocarbimate moieties. The molar conductance data were consistent with the 1:1 cation:anion complexes in 1-4. The antifungal activities of the compounds were tested in vitro against Candida albicans, Candida tropicalis and Colletotrichum gloeosporioides
SAIS DE TETRAFENILFOSFÔNIO E TRIS(1,10-FENANTROLINA)FERRO(II) DE COMPLEXOS ANIÔNICOS DE DIBUTILESTANHO(IV) COM DITIOCARBIMATOS: SÍNTESE, CARACTERIZAÇÃO E ATIVIDADE ANTIFÚNGICA
Six new salts of organometallic complexes of tin(IV) with the general formulae: (Ph4P)2[Sn(Bu)2(RSO2N=CS2)2] and [Fe(phen)3][Sn(Bu)2(RSO2N=CS2)2] [Ph4P = tetraphenylphosphonium, R = CH3 (1), C2H5 (2) and C4H9 (3); Fe(phen)3 = tris(1,10-phenanthroline)iron(II), R = CH3 (4), C2H5 (5) and C4H9 (6)] were synthetized from potassium dithiocarbimates (RSO2N=CS2K2.H2O) in reaction with dichlorobis-n-butyltin(IV) and tetraphenylphosphonium chloride (1-3) in N,N-dimethylformamide or tris(1,10-phenanthroline)iron(II) (4-6) in methanol. The new compounds were characterized by elemental analysis of Fe and Sn, and by vibrational, Mössbauer and nuclear magnetic resonance of 1H, 13C and 119Sn spectroscopies. High-resolution mass spectra in the negative and positive modes were also obtained. The elemental analyses and the exact masses obtained for the cations and the complex anions were consistent with the proposed formulae. The Mössbauer spectroscopic data were consistent with the presence of tin(IV) with coordination numbers between 4 and 5 (compounds 1-6), and of hexacoordinated iron(II) (compounds 4-6). The 1H and 13C NMR spectra presented all the expected signals for the cations and anions, and the signals observed in the 119Sn NMR spectra indicated an equilibrium between tetra- and pentacoordination around the tin atoms in solution. The in vitro activity of the new compounds was evaluated against Botrytis cinerea and Colletotrichum acutatum