A multinuclear (1H, 13C, 15N) NMR study of cis-halonitrosylbis(dithiocarbamato)iron(II) complexes: effect of replacement of S by Se

Law, Neil A.; Dietzsch, W.; Duffy, Norman V.

doi:10.1016/j.poly.2003.08.010

Cited by 16 publications

(8 citation statements)

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“…5 Nowadays copper(II) dithiocarbamate is successfully used as single source precursor for the growth of semiconducting copper sulfide thin films. 6 The iron(II), iron(III) dithiocarbamates have been studied for their spincrossover phenomenon, 7 radical traps for NO, 8 and as antioxidants and pro-oxidants in biological systems. 9 Diethyl dithiocarbamates are also known to inhibit the activity of Cu/Zn-superoxidedismutase (SOD) through the withdrawal of copper from the protein both in vivo and in vitro.…”

Section: Introductionmentioning

confidence: 99%

Template synthesis of symmetrical transition metal dithiocarbamates

Siddiqi¹,

Nami²,

Lutfullah³

et al. 2006

J. Braz. Chem. Soc.

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have chlorine bridged distorted-octahedral geometry. It has been observed that the dithiocarbamato moiety is symmetrically bonded in all the cases. A three stage TGA profile is observed for all the complexes leading to the formation of respective metal sulfide as the end-product. The molar conductance of 10 -3 mol L -1 solution of the complexes measured in DMSO is indicative of their non-ionic nature. Keywords: dithiocarbamates, transition metals, thermal analysis, symmetrical bonding IntroductionDithiocarbamates are used to stabilize a wide range of oxidation states of different metal ions. 1 A large number of compounds are known where CS 2 binds in η 1 -end on, η 2 -side or in η 3 -coordination modes. 2-4 The major advantage of using the small bite-angle of dithiocarbamato moiety as a stabilizing chelating ligand, is its unique property to remain intact under a variety of reaction conditions. 5 Nowadays copper(II) dithiocarbamate is successfully used as single source precursor for the growth of semiconducting copper sulfide thin films. 6 The iron(II), iron(III) dithiocarbamates have been studied for their spincrossover phenomenon, 7 radical traps for NO, 8 and as antioxidants and pro-oxidants in biological systems. 9 Diethyl dithiocarbamates are also known to inhibit the activity of Cu/Zn-superoxidedismutase (SOD) through the withdrawal of copper from the protein both in vivo and in vitro. 10 Some dialkyl-substituted dithiocarbamates have proved to be an efficient anti-alkylating, anti-HIV and froth-floatation agents. 11 The optical and electrochemical properties of dithiocarbamates can effectively be used to construct sensors for guest molecules and macromolecules. [12][13][14] In this paper, we report a convenient one-pot synthesis of the transition metal dithiocarbamates via template procedure. In the present work, a condensation reaction was carried out between acetylacetone, ethylenediamine, 108 Siddiqi et al. J. Braz. Chem. Soc. carbon disulfide in a single step leading to the formation of a ring like complex ( Figure 1 and Figure 2). ExperimentalHydrated metal chlorides (BDH) acetylacetone, carbon disulfide (Merck) and ethylenediamine (Ranbaxy) were used as received. Methanol was used after distillation. Elemental analyses (C, H, N and S) were carried out with a Flash EA-1112 Analyser, CE Instrument. IR spectra (4000-400 cm -1 ) were recorded on a FT-IR Perkin-Elmer Spectrum BX as KBr disc while the 600-200 cm -1 range were scanned on CsI on Nexus FT-IR Thermo Nicolet, Madison Wisconsin. The conductivity measurements were carried out with a CM-82T Elico conductivity bridge in DMSO. The electronic spectra were recorded on a Cintra 5GBC spectrophotometer in DMSO. Magnetic susceptibility measurements were done with a Sherwood Scientific MSB Auto at room temperature. TGA/DSC was performed with a Universal V3.8 B TA SDT Q600 Build 51 Thermal Analyzer under nitrogen atmosphere using alumina powder as reference material. The heating rate was maintained at 10 °C min -1 . The metal contents were estimated by...

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Section: Introductionmentioning

confidence: 99%

Template synthesis of symmetrical transition metal dithiocarbamates

Siddiqi¹,

Nami²,

Lutfullah³

et al. 2006

J. Braz. Chem. Soc.

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“…The N-H signals of the polymeric ligand appear at 8.02 ppm due to oxamide protons. In the Zn(II) complex of PEODS, the intensity of N-H protons is reduced [17], due to coordination with the metal after deprotonation, which is also confirmed by FTIR spectra of the polymer metal complexes. The intensity of other peaks also decreased due to coordination of transition metal ions.…”

Section: H-nmr Spectra Of Polyester and Its Zinc Complexmentioning

confidence: 53%

Synthesis, characterization and anti-microbial activity of poly(ethylene oxamide- N,N ′-disuccinate) and its polymer metal complexes

Ahamad

Parveen

Nishat

2008

Journal of Coordination Chemistry

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Poly(ethylene oxamide-N,N 0 -disuccinate), abbreviated as (PEODS), has been synthesized by condensation of oxamide-N,N 0 -disuccinic acid and 1,2-ethylene glycol. Coordination polymers were synthesized by the reaction of (PEODS) with hydrated acetates of Mn(II), Co(II), Ni(II), Cu(II) and Zn(II). The resulting polyester-metal complexes were characterized by elemental analysis, UV-Visible, FT-IR, 1 H-NMR, ESR spectroscopy and magnetic susceptibilities. Thermal behavior of all the synthesized compounds revealed that polymer metal complexes are more stable than the polymeric ligand. In addition all the synthesized polymers were screened for anti-bacterial activity against B. subtelillisr, B. megaterium, S. aureus, E. coli, S. typhi, P. aeruginosa, S. boydii and for antifungal activity against C. albicans, T. species, A. flavus, A. niger, F. species, M. species, and P. species by agar well diffusion methods. All the polymers showed good anti-bacterial and anti-fungal activity, which increased on coordination with the metal ions.

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“…It was observed that DMSO had no coordination effect on the spectra of the ligands or on their metal complexes. 27 The 13 C NMR spectrum of the Zn(II) chelated (PEODA) is given in Fig. 2.…”

Section: H-nmr Spectra and 13 C-nmr Spectra Of Polyester And Their Comentioning

confidence: 99%

In vitro antibacterial and antifungal assay of poly‐(ethylene oxamide‐N,N′‐diacetate) and its polymer–metal complexes

Ahamad

Parveen

Nishat

2007

Applied Organom Chemis

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A new polyester, poly-(ethylene oxamide-N,N -diacetate) (PEODA), containing glycine moiety was synthesized by the reaction of oxamide-N,N -diacetic acid and ethylene glycol and its polymer-metal complexes were synthesized with transition metal ions. The monomer oxamide-N,N -diacetic acid was prepared by the reaction of glycine and diethyl oxalate. The polymer and its metal complexes were characterized by elemental analysis and other spectroscopic techniques. The in vitro antibacterial activities of all the synthesized polymers were investigated against some bacteria and fungi. The analytical data revealed that the coordination polymers of Mn(II), Co(II) and Ni(II) are coordinated with two water molecules, which are further supported by FTIR spectra and TGA data. The polymer-metal complexes showed excellent antibacterial activities against both types of microorganisms; the polymeric ligand was also found to be effective but less so than the polymer-metal complexes. On the basis of the antimicrobial behavior, these polymers may be used as antifungal and antifouling coating materials in fields like life-saving medical devices and the bottoms of ships.

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A multinuclear (1H, 13C, 15N) NMR study of cis-halonitrosylbis(dithiocarbamato)iron(II) complexes: effect of replacement of S by Se

Cited by 16 publications

References 46 publications

Template synthesis of symmetrical transition metal dithiocarbamates

Template synthesis of symmetrical transition metal dithiocarbamates

Synthesis, characterization and anti-microbial activity of poly(ethylene oxamide- N,N ′-disuccinate) and its polymer metal complexes

In vitro antibacterial and antifungal assay of poly‐(ethylene oxamide‐N,N′‐diacetate) and its polymer–metal complexes

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