Synthesis, characterization and X-ray crystal structures of two non-molecular coordination polymers of manganese(II) and copper(II) with N-(2-pyridylmethyl)-l-alanine and isothiocyanato ligands

Ntum, Sally Judith E; Ndosiri, Bridget N.; Mohamadou, Aminou; Marrot, Jérôme; Agwara, Moise O.; Raftery, James; Malik, Mohammad Azad; Ndifon, Peter T.

doi:10.1007/s11243-016-0091-y

Cited by 3 publications

(6 citation statements)

References 21 publications

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“…However, the Zn-O2 bond length is in close agreement with other known axial M-O bond lengths. The Zn1-N3-C10 bond angles, 174.3(5) o , in compound (1) agrees with M-N-C metal isothiocyanates values in the literature [15,[23][24][25].…”

Section: Crystal Structure Of Zn(pyala)scnsupporting

confidence: 86%

“…The coordination geometry around the zinc atom can be described as a distorted square-pyramidal (Figure 6). The basal positions are defined by O2, N1 and N2 of the tridentate reduced Schiff base ligand, HL1 and by N3 of the thiocyanate ligand L2; while the apical position is occupied by the bridging O2 of another HL1 ligand as shown in Figure 6 [15]. The calculated trigonality index, τ = 0.15 confirms a non-perfect squarepyramidal geometry, (τ = 1 for a perfect trigonal bipyramidal geometry and τ = 0 for a perfect square-pyramidal geometry [22].…”

Section: Crystal Structure Of Zn(pyala)scnmentioning

confidence: 99%

“…Multidimensional Zn(II) coordination polymers is an area of recent interest due to its numerous applications [13,14]. Our recent focus has been on the synthesis of mixed ligand complexes involving tridentate reduced Schiff bases and the thiocyanate ion which also exhibit versatile coordinating abilities [15,16]. We report herein, the synthesis, characterisation and x-ray crystal structure of a zinc(II) coordination polymer derived from ammonium thiocyanate and a reduced Schiff base mixed ligands.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and crystal structure of a zinc(II) coordination polymer: N-(2-pyridylmethyl)- L-alanine)isothiocyanate Zn(II)

Ntum¹,

Mainsah²,

Mohamadou³

et al. 2020

Bull. Chem. Soc. Eth.

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The title compound, N-(2-pyridylmethyl)-L-alanine) zinc(II), [Zn(C10H11N3O2S)], a coordination polymer derived from the mixed ligands, N-(2-pyridylmethyl)-L-alanine (HL1) and ammonium thiocyanide (L2) has been synthesized and characterized by IR spectroscopy, 1H-NMR, elemental analysis, thermogravimetric analysis and single crystal x-ray structure determination.The single crystal X-ray structure analysis of the title compoundreveals a molecular polymeric compound that crystallizes in the orthorhombic crystal system and P2(1)2(1)2(1) space group. The ligand acts as a bridge between adjacent zinc(II) centres, each of which adopts a five-coordinate geometry. Zinc bonds to two N atoms and one O atom of HL1, one N atom of L2 and one O atom of another HL1 ligand. This is confirmed by IR spectroscopy. Thermogravimetric analysis shows a one-step decomposition of the complex to leave a zinc sulfide residue. KEY WORDS: Zinc(II), N-(2-pyridylmethyl)-(L)-alanine) ligand, Isothiocyanate, Coordination polymer, Single crystal structure Bull. Chem. Soc. Ethiop. 2020, 34(2), 285-293 DOI: https://dx.doi.org/10.4314/bcse.v34i2.7

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Section: Crystal Structure Of Zn(pyala)scnsupporting

confidence: 86%

Section: Crystal Structure Of Zn(pyala)scnmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis and crystal structure of a zinc(II) coordination polymer: N-(2-pyridylmethyl)- L-alanine)isothiocyanate Zn(II)

Ntum¹,

Mainsah²,

Mohamadou³

et al. 2020

Bull. Chem. Soc. Eth.

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“…Despite the fact that metal (II) complexes of heterocyclic Schiff base ligands derived from thiosemicarbazone stand out as a promising class of compounds that are considered useful models for bioorganic processes [16], only a few studies have been reported on the use of Ni(II), Cu(II), and Zn(II) complexes of 2-benzoylpyridine thiosemicarbazone as antimicrobial and antioxidant agents. Our group has recently embarked on studies on the antimicrobial and antioxidant activities of complexes of heterocyclic Schiff base ligands [13,[17][18][19][20]. Some of these heterocyclic Schiff base ligands derived from either isoniazid (Isonicotinic acid hydrazide) [13,17,18] or amino acids [19,20] are generally bidentate or tridentate chelators, forming six-coordinate complexes.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, and biological activity of Cu(II), Ni(II), and Zn(II) complexes of a tridentate heterocyclic Schiff base ligand derived from thiosemicarbazide and 2-benzoylpyridine

et al. 2022

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Ni(II), Cu(II), and Zn(II) complexes of the tridentate heterocyclic ligand, 2-(phenyl(pyridin-2-yl)methylene)hydrazine-1-carbothioamide (HL) have been synthesized and characterized by various spectroscopic techniques and elemental analyses. Infrared spectroscopy shows that the ligand coordinates to the metal ions through the azomethine and pyridine nitrogen atoms as well as the sulfur atom of the thioamide group to form a tridentate chelate system. In vitro screening of metal complexes against four bacterial strains (Staphylococcus aureus (ATCC 43300), Klebsiella pneumoniae (ATCC 700603), Methicillin resistant staphylococcus aureus (ATCC 33591), Shigella flexneri (NR 518)) and four fungal strains (Candida albicans (NR 29444), Candida albicans (NR 29445), Candida albicans (NR 29451), Candida krusei (HM 1122)) indicate that the Cu(II) complex showed good antibacterial activity on Methicillin resistant staphylococcus aureus (ATCC 33591) while the Zn(II) complex showed moderate activity against some of the bacterial and fungi strains. Antioxidant studies reveal that the complexes are more potent than the ligand to eliminate free radicals, with the Ni(II) complex showing the best free radical scavenger.

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“…Our group has recently embarked on studies on the biological activities of complexes of heterocyclic Schiff base ligands [15,22]. One such class of heterocyclic Schiff base ligands is the pyridine carboxaldehyde isonicotinoyl hydrazones, derived from isoniazid (isonicotinic acid hydrazide) which are generally bidentate or tridentate chelators and typically form six-coordinate complexes [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, Cyclic Voltammetry, and Biological Studies of Co(II), Ni(II), and Cu(II) Complexes of a Tridentate Schiff Base, 1-((E)-(2-Mercaptophenylimino) Methyl) Naphthalen-2-ol (H2L1)

Kuate

Conde

Mainsah

et al. 2020

Journal of Chemistry

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A novel tridentate Schiff base, 1-((E)-(2-mercaptophenylimino) methyl) naphthalen-2-ol (H2L1), was synthesized by the condensation reaction of 2-hydroxy-1-naphthaldehyde with 2-aminothiophenol in absolute ethanol. The resulting ligand was reacted with Co(II), Ni(II), and Cu(II) ions to obtain tetrahedral CoL1, NiL1, and square planar CuL1 complexes. The Schiff base and its metal complexes were characterized using 1H-NMR, microanalysis, FT-IR, UV-visible, and mass spectroscopy (ESI-MS). All the compounds are soluble in DMSO and DMF. Spectroscopic studies show that the ligand coordinates to the metal center through the azomethine nitrogen, naphthoxide oxygen, and thiophenoxide sulfur to form a tridentate chelate system. Conductance measurements show that these compounds are molecular in solution. Cyclic voltammetry studies show Co(III)/Co(II) and Cu(II)/Cu(I) redox systems to be quasi-reversible involving a monoelectronic transfer while Ni(III)/Ni(II) was irreversible. In vitro antibacterial and antifungal activity against five bacterial strains (Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Enterococcus faecalis, and Proteus mirabilis) and five fungal strains (Candida albicans, Candida glabrata, Candida tropicalis, Candida krusei, and Candida parapsilosis) showed no antifungal activity but moderate antibacterial activity on E. coli, S. aureus, P. aeruginosa, and P. mirabilis bacterial strains. Antioxidant studies reveal that the ligand and its Cu(II) complex are more potent than Co(II) and Ni(II) complexes to eliminate free radicals.

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Synthesis, characterization and X-ray crystal structures of two non-molecular coordination polymers of manganese(II) and copper(II) with N-(2-pyridylmethyl)-l-alanine and isothiocyanato ligands

Cited by 3 publications

References 21 publications

Synthesis and crystal structure of a zinc(II) coordination polymer: N-(2-pyridylmethyl)- L-alanine)isothiocyanate Zn(II)

Synthesis and crystal structure of a zinc(II) coordination polymer: N-(2-pyridylmethyl)- L-alanine)isothiocyanate Zn(II)

Synthesis, characterization, and biological activity of Cu(II), Ni(II), and Zn(II) complexes of a tridentate heterocyclic Schiff base ligand derived from thiosemicarbazide and 2-benzoylpyridine

Synthesis, Characterization, Cyclic Voltammetry, and Biological Studies of Co(II), Ni(II), and Cu(II) Complexes of a Tridentate Schiff Base, 1-((E)-(2-Mercaptophenylimino) Methyl) Naphthalen-2-ol (H2L1)

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