Formation of polymeric assemblies of six-coordinate metal complexes with mixed bridges of dicarboxylato-azido moieties

Ahmed, Riyadh M.; Hamdan, Taki A.; Numan, Ahmed T.; Al-Jeboori, Mohamad J.; Potgieter, J.H.

doi:10.1080/2164232x.2014.883290

Cited by 4 publications

(6 citation statements)

References 26 publications

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“…The precipitate was washed with acetone (3 × 35 mL) and dried under a vacuum. The 1 H NMR spectrum matched that reported in the literature. , …”

Section: Methodssupporting

confidence: 86%

“…The 1 H NMR spectrum matched that reported in the literature. 42,43 Synthesis of 3•Cl 2 . 4,4′-Bipyridine (3.12 g, 20 mmol) and 4-(chloromethyl)benzoic acid (6.824 g, 40 mmol) were dissolved in DMF (15 mL) and stirred at 120 °C (oil bath) under nitrogen for 4 h. After cooling, the resulting precipitate was filtered off, washed with DMF, and dried under a vacuum to give the desired product as a white powder (35% yield).…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

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Kinetics and Thermodynamics of Binding between Zwitterionic Viologen Guests and the Cucurbit[7]uril Host

Zheng

Kaifer

2020

J. Org. Chem.

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The host–guest binding interactions between a series of zwitterionic, symmetric viologens, and the cucurbit[7]uril host were investigated using NMR and UV–vis spectroscopic techniques. The nature of the viologen side arms had strong effects on the kinetics of association and dissociation and weaker, more uniform influence on the thermodynamic stability of the final 1:1 inclusion complexes, which can also be characterized as pseudorotaxanes.

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“…The precipitate was washed with acetone (3 × 35 mL) and dried under a vacuum. The 1 H NMR spectrum matched that reported in the literature. , …”

Section: Methodssupporting

confidence: 86%

Section: ■ Experimental Sectionmentioning

confidence: 99%

Kinetics and Thermodynamics of Binding between Zwitterionic Viologen Guests and the Cucurbit[7]uril Host

Zheng

Kaifer

2020

J. Org. Chem.

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“…The magnetic moment measurements values of Mn(II), Co(II) and Ni(II) complexes are 2.46, 2.23 and 3.28 BM, respectively. These values are lower than the total spin-only values, indicating a tetrahedral geometry around the metal centre 31 .…”

Section: Electronic Spectra and Magnetic Moment Measurementsmentioning

confidence: 65%

New dimeric complexes with semicarbazone mannich-based ligand; formation, structural investigation and biological activity

Abaas,

Al-Jeboori

2023

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The formation of a new semicarbazone Schiff-base ligand (E)-2-(2-(phenyl(2-phenylhydrazinyl)- methyl)cyclohexylidene)hydrazine-1-carboxamide (HL) and its complexes are reported. The new ligand was prepared from the condensation of the Mannich-base 2-(phenyl(2-phenylhydrazinyl)methyl)cyclohexan-1-one (M) with the semicarbazide. A series of metal complexes were prepared by the reaction of the ligand with the metal chlorides of Cr(III), Mn(II), Co(II), Ni(II), Cu(II)), Zn(II) and Cd(II). The structure of the ligand and its complexes were elucidated through analytical and spectroscopic techniques. The analyses indicated the ligand behaves as a monobasic tridentate species and the isolation of dimeric complexes with the general formula; [Cr(L)(Cl)2(H2O)]2, [M(L)Cl]2 (where M= Mn(II), Co(II), Ni(II), Cu(II)), Zn(II) and Cd(II)). These studies revealed a distorted octahedral geometry for Cr(III), a distorted square planar for Cu(II) and a tetrahedral arrangement for Mn(II), Co(II), Ni(II), Zn(II) and Cd(II). The biological activity of the prepared compounds against Escherichia coli, Pseudomonas auroginosa, Staphylococcus aureus and Bacillus subtilis compared with Cefotaxime (as a standard antibiotic) was also explored. Some of the examined compounds indicated a similar antibacterial activity to Cefotaxime. Furthermore, antifungal activity against Candida albicans and Rhizopus sporium was investigated, which showed that the ligand and its complexes exhibited good antifungal activity. Keywords: Schiff-base ligand; Structural characterization; Dimeric semicarbazone complexes; Biological activity.

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“…0.77 g (84%) yield, M. p = 235 °C. The FTIR spectrum of the precursor (N) (1E,3E)-N1,N3-bis(4-chloro-3-(1H-tetrazol-5yl)phenyl)cyclohexane-1,3-diimine displayed prominent peaks attributable to the functional groups ν(N-H), ν(C=N), ν(C=N)triazole, ν(N-H), ν(N=N) and ν(N-N) [25][26][27] . Bands around 3226 and 1643 cm -1 were observed as a result of ν(N-H) and ν(C=N) in precursor (N) 28,29 .…”

Section: Synthesis Of Precursor(n)mentioning

confidence: 99%

Synthesis, Characterisation and Biological Activity of New Co, Ni, Zn and Cd Polymeric Complexes Derived from Dithiocarbamate Ligand

et al. 2023

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Synthesis of a new class of Schiff-base ligand with a tetrazole moiety to form polymeric metal complexes with CoII, NiII, ZnII, and CdII ions has been demonstrated. The ligand was synthesised by a multi-steps by treating 5-amino-2-chlorobenzonitrile and cyclohexane -1,3-dione, the 5,5'-(((1E,3E)-cyclohexane-1,3-diylidene)bis(azanylylidene))bis(2-chlorobenzonitrile) was obtained. The precursor (M) was prepared from the reaction 5,5'-(((1E,3E)-cyclohexane-1,3-diylidene)bis(azanylylidene))bis(2-chlorobenzonitrile) with NaN3 to obtained (1E,3E)-N1,N3-bis(4-chloro-3-(1H-tetrazol-5-yl)phenyl)cyclohexane-1,3-diimine (N). By reacting the precursor (M) with CS2/KOH, the required ligand was synthesised. Co (II), Ni (II), Zn (II), Cd (II) ions produce polymeric metal complexes with the formula [M(L)]n when they react with the ligand (L). These complexes were synthesised using the same methods. The geometrical structure of ligand and their polymeric complexes were determined using FTIR, 1H, 13C-NMR, electronic spectroscopy, ESMS, magnetic susceptibility, metal and chloride contents, micro elemental analysis and conductance. From the results ,we conclude that the L-complexes demonstrate the production of four-coordinate complexes with tetrahedral geometry for Co(II), Zn(II), and Cd(II), and square planer geometry for Ni (II). We examined the antibacterial activity of both ligand and complexes with two types of bacteria positive (Bacillus stubtili and Staphylococcus aureus ) and negative (Escherichia coli and Pseudomonas aeruginosa ) with concentration 10-2.

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Formation of polymeric assemblies of six-coordinate metal complexes with mixed bridges of dicarboxylato-azido moieties

Cited by 4 publications

References 26 publications

Kinetics and Thermodynamics of Binding between Zwitterionic Viologen Guests and the Cucurbit[7]uril Host

Kinetics and Thermodynamics of Binding between Zwitterionic Viologen Guests and the Cucurbit[7]uril Host

New dimeric complexes with semicarbazone mannich-based ligand; formation, structural investigation and biological activity

Synthesis, Characterisation and Biological Activity of New Co, Ni, Zn and Cd Polymeric Complexes Derived from Dithiocarbamate Ligand

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