Fluorenone hydrazine-S-benzyldithiocarbazate transition metal complexes

El‐Sonbati, A.Z.; Mabrouk, E. M.; Megahed, H. E.

doi:10.1007/bf01032853

Cited by 27 publications

(16 citation statements)

References 18 publications

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“…Also, the value of 6.95 mdyne/Å of the force constant (f U-O ) agrees well with the force constant values of a similar dioxouranium(VI) complex [12,14,15]. The U-O bond value distance, calculated from the equation:…”

Section: Uranyl(ii) Polymer Complexsupporting

confidence: 57%

“…A strong band at 1615 cm −1 is assigned to the ν(C=N). Coordination of the C=S of the homo-polymer moiety is indicated by a negative shift of 15-25 cm −1 , observed in the ν(C=S) mode of all the polymeric complexes compared with its position at 765 cm −1 in the homo-polymer [15].…”

Section: Ru(iii)/rh(iii) Polymer Complexesmentioning

confidence: 99%

“…New bands of weak to medium intensities in the 255-505 cm −1 region of the polymer complexes spectra may be assigned to the coupled vibrations of ν(M-Cl), ν(M-O) and ν(M-S) [15].…”

Section: Ru(iii)/rh(iii) Polymer Complexesmentioning

confidence: 99%

“…The dioxouranium(VI) compound (5) exhibits ν sym (O=U=O) (810 cm −1 ) and ν asym (O=U=O) (920 cm −1 ), the usual rang for such complexes being ν sym (780-855) and ν asym (870-950 cm −1 ) [12,15]. Also, the value of 6.95 mdyne/Å of the force constant (f U-O ) agrees well with the force constant values of a similar dioxouranium(VI) complex [12,14,15].…”

Section: Uranyl(ii) Polymer Complexmentioning

confidence: 99%

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Role of a Novel Mixed-Valence-Ligand on the Structures of Supramolecular Polymeric Complexes

Mubarak

2008

Designed Monomers and Polymers

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The design of supramolecular polymer complexes of ruthenium, rhodium and uranium based on the homopolymer N-acryloyl-1-ethyl-2-thiourea (AETH) has been pursued. AETH shows three types of coordination behaviour. It acts as a neutral bidentate ligand coordinating through its thiocarbonyl sulphur and carbonyl oxygen atoms in both the mixed valence paramagnetic trinuclear polymer complexes ( (1) and (2)) and mononuclear polymer complexes ( (3)- (5)). On the other hand, it behaves as a monobasic bidentate ligand coordinating through CS and enolic (C-O) bonds in the mixed ligand poly-chelates (PAETH), which are obtained from the reaction of AETH with RuCl 3 · xH 2 O in the presence of N-heterocyclic base consisting of polymer complexes ( (7) and (8)). The mononuclear compound (6) acts as a monobasic and neutral bidentate ligand coordinating through CO and imino atoms. Monomeric distorted octahedral or trimeric chlorine-bridge pseudo-octahedral structures are proposed for these polymer complexes. The stoichiometries of the poly-chelates are 1:1, 1:2 and 3:2 (metal/homo-polymer) and exhibit six-coordinations. The amine homo-polymer exchange reactions of coordination poly-chelate in symmetrical and unsymmetrical bidentate homo-polymer complexes have been investigated and the ligand field parameters were also calculated. The homo-polymer and its polymer complexes have been characterized using a variety of physiochemical techniques.  Koninklijke Brill NV, Leiden, 2008

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Section: Uranyl(ii) Polymer Complexsupporting

confidence: 57%

Section: Ru(iii)/rh(iii) Polymer Complexesmentioning

confidence: 99%

“…New bands of weak to medium intensities in the 255-505 cm −1 region of the polymer complexes spectra may be assigned to the coupled vibrations of ν(M-Cl), ν(M-O) and ν(M-S) [15].…”

Section: Ru(iii)/rh(iii) Polymer Complexesmentioning

confidence: 99%

Section: Uranyl(ii) Polymer Complexmentioning

confidence: 99%

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Role of a Novel Mixed-Valence-Ligand on the Structures of Supramolecular Polymeric Complexes

Mubarak

2008

Designed Monomers and Polymers

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“…We have observed medium intensity ν(M-S) in the 527-442 cm -1 range which is in agreement with the observations made by Sonbati. 23 On the basis of normal coordinate analysis of nonplanar halogen bridged molecules it has been found that the bridging ν(M-X) are 40-45% lower than the terminal ν(M-X). [24][25][26] The four absorption bands found for terminal M-X bonds have higher frequencies while the bridging M-Cl are relatively weaker and appear in lower wave number region.…”

Section: Ir Spectramentioning

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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Novel bioactive copper and nickel polymeric complexes: Synthesis, characterization, antimicrobial activity, and DFT calculations

Metwally,

Mohamed,

ElKhawaga

et al. 2023

J of Applied Polymer Sci

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Polymeric complexes, especially metal‐containing polymers, possess aggregated medical applications, especially as antibacterial and antifungal agents. This work describes a facile procedure for producing a series of novel copper and nickel complexes of poly(2‐hydroxyphenyl methacrylamide) and poly(2‐carboxyphenyl methacrylamide). The polymeric ligands were synthesized through a multistep procedure. Firstly, 4‐formylphenyl methacrylate was constructed by acylating 4‐hydroxybenzaldehyde with methacryloyl chloride. Then, polymerization of the as‐prepared monomer to obtain poly(4‐formylphenyl methacrylate) using benzoyl peroxide as an initiator. Thirdly, the polymeric ligands PL1 and PL2 were achieved via exchange reactions between poly(4‐formylphenyl methacrylate) and o‐aminophenol and anthranilic acid, respectively. Consequently, the two ligands were reacted with copper and nickel acetates to afford four target complexes (Cu‐PL1, Ni‐PL1, Cu‐PL2, and Ni‐PL2). By FT‐IR, 1HNMR, UV‐visible, and TGA analyses, the structures of PL1, PL2, and their complexes were investigated. Furthermore, the geometries of PL1, PL2, and their complexes were reported through a molecular modeling to investigate some interesting parameters such as the bond length, bond angle, charge on the atoms, the HOMO and LUMO using the Material Studio program. The calculation results illustrated that octahedral geometries are proposed for the synthesized metal complexes. The reported antimicrobial efficiency showed a strong potency for most synthesized compounds against the selected microbes, especially compounds Cu‐PL1 and Cu‐PL2 which are more effective than the standard against Candida albicans.

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Fluorenone hydrazine-S-benzyldithiocarbazate transition metal complexes

Cited by 27 publications

References 18 publications

Role of a Novel Mixed-Valence-Ligand on the Structures of Supramolecular Polymeric Complexes

Role of a Novel Mixed-Valence-Ligand on the Structures of Supramolecular Polymeric Complexes

Template synthesis of symmetrical transition metal dithiocarbamates

Novel bioactive copper and nickel polymeric complexes: Synthesis, characterization, antimicrobial activity, and DFT calculations

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