Synthesis, spectral characterization and X-ray crystal structure of Fe(III) and Co(III) complexes with an acyclic Schiff base ligand

Sow, Mouhamadou Moustapha; Diouf, Ousmane; Gaye, Mohamed; Sall, Abdou Salam; Pérez‐Lourido, Paulo; Valencia-Matarranz, L.; Castro, Goretti; Caneschi, Andréa; Sorace, Lorenzo

doi:10.1016/j.ica.2013.07.018

Cited by 7 publications

(6 citation statements)

References 37 publications

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“…In the literature, dinuclear compounds of manganese or cobalt which exhibit ferromagnetic or antiferromagnetic interactions are largely reported [34] [35] [36]. In recent years, we have prepared different symmetrical Schiff base types from the condensation of carbono or thiocarbono hydrazide and aldehydes or ketones which are subsequently used to prepare dinuclear or tetranuclear metal complexes [37] [38] [39]. In the absence of any particular precautions, the reaction which is a nucleophilic addition of the primary amine on the carbonyl group, proceeds on both arms of the carbonohydrazide.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Spectroscopic Studies and X-Ray Diffraction of Heptacoordinated Mn(II) and Co(II) Complexes with Ligands Derived from Carbonohydrazide

Seck¹,

Sy²,

Lo³

et al. 2019

OJIC

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The ligand 1-(1-(pyridin-2-yl)ethylidene)carbonohydrazide (H 4 L 1) and 1-(pyridin-2-ylmethylene)carbonohydrazide (H 4 L 2) were prepared by reaction of carbonohydrazide with 2-acetylpyridine or pyridine carbaldehyde respectively in a reflux methanol solution. The complexes are prepared by reaction of the ligand with the appropriate metal salt. These complexes are well characterized by elemental analysis, IR and UV spectroscopies and their structure were determined by single X-ray diffraction technic. In the crystal of the dinuclear complex [Mn 2 (H 4 L 1) 2 (H 2 O) 4 ]•Cl 4 , 1) each Mn(II) center is seven coordinated by two nitrogen atom and one carbonyl atom of the one ligand and one nitrogen atom and one carbonyl oxygen atom of another ligand molecule. The coordination sphere is completed by two water molecules. Each of the carbonyl oxygen atom acts as bridge between the two Mn(II) centers. In the mononuclear complex [Co(H 4 L 2)(NO 3)(H 2 O) 2 ]•(NO 3); 2) the Co(II) center is heptacoordinated. The ligand acts in tridentate fashion through two nitrogen atoms and one carbonyl oxygen atom. Two water molecules lie in the apical positions. One nitrate group acts in bidentate manner while the other nitrate group remains uncoordinated. In both complexes the coordination polyhedral are best described as a pentagonal bipyramid. The molecules are linked together in each case by multiple hydrogen bond interaction resulting in a three-dimensional network. The crystallographic data has been deposited in Cambridge Crystallographic Data Centre [CCDC No. 1944387 (complex 1

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Section: Introductionmentioning

confidence: 99%

Synthesis, Spectroscopic Studies and X-Ray Diffraction of Heptacoordinated Mn(II) and Co(II) Complexes with Ligands Derived from Carbonohydrazide

Seck¹,

Sy²,

Lo³

et al. 2019

OJIC

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“…The imino nitrogen atoms are axially positioned (Co1―N3 1.877(15) Å and Co1―N6 1.855(15) Å) and four oxygen atoms constitute the equatorial plane of the octahedron. The bite angles for the ligands (L 2− and LH − ) lie in the range 82.84–94.20°, indicating a distortion from an ideal octahedral geometry, with the trans ‐donor bond angles in the range 174.9(3)–177.7(3)° and the cis ‐donor bond angles in the range 87.0(3)–94.7(3)°. The Co1―O phenolate bond distances of 1.864(13) and 1.857(13) Å are for Co1―O3 and Co1―O6 bonds, respectively.…”

Section: Resultsmentioning

confidence: 99%

Mononuclear Co(III), Ni(II) and Cu(II) complexes of tridentate di‐tert‐butylphenylhydrazone: Synthesis, characterization, X‐ray crystal structures, Hirshfeld surface analysis, molecular docking and in vivo anti‐inflammatory activity

Chimmalagi

Kendur

Patil

et al. 2018

Applied Organom Chemis

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A new hydrazone (LH 2 ) derived from the condensation of 2-(4-fluorobenzamido) benzohydrazide with 3,5-di-tert-butyl-2-hydroxybenzaldehyde was used to synthesize Co(III), Ni(II) and Cu(II) complexes. These were characterized using various physicochemical, thermal, spectroscopic and single-crystal X-ray diffraction techniques. All the complexes crystallize in a monoclinic crystal system with P2 1 /n space group and Z = 4. Structural studies of [Co(L)(LH)]⋅H 2 O indicate the presence of both amido and imidol tautomeric forms of the ligand, resulting in a distorted octahedral geometry around the Co(III) ion. On the other hand, in the [Ni(L)(DMF)] and [Cu(L)(H 2 O)] complexes, the ligand coordinates to the metal through imidol form resulting in distorted square planar geometry, in which the fourth position is occupied by the oxygen of coordinated DMF in [Ni(L)(DMF)] and by a water molecule in [Cu(L)(H 2 O)]. Hirshfeld surface calculations were performed to explore hydrogen bonding and C-H⋅⋅⋅π interactions.Molecular docking studies were carried out to study the interaction between the synthesized compounds and proteins (cyclooxygenase-2 and 5-lipoxygenase). The complexes along with the parent ligand were screened for their in vivo anti-inflammatory activity, using the carrageenan-induced rat paw oedema method. The complexes show significant anti-inflammatory potencies.

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“…In this case, the formation of a dinuclear complex with a -N,N bridge is generally observed, for example in a dinuclear copper(II) complex (Dragancea et al, 2014). The S-cis-enol configuration leads to the formation of square-grid complexes by directed ISSN 2056-9890 self-assembly (Bikas et al, 2015;Sow et al, 2013;Li et al, 2014). In these complexes, -O and -N,N atoms bridge the metal ions, which display N 4 O 2 or N 5 O octahedral environments (Shuvaev et al, 2010).…”

Section: Chemical Contextmentioning

confidence: 98%

“…S-cis or S-trans, yielding different structures with the same metal cation. These ligands can coordinate to transition metals in a pentadentate or hexadentate manner (El-Gammal et al, 2012;Sow et al, 2013), as well as in the ketonic or enolic form (Zhang et al, 2014). When the configuration of this kind of ligand is S-trans, it acts in a hexadentate fashion.…”

Section: Chemical Contextmentioning

confidence: 99%

“…The free dicarbonohydrazide exhibits biological activities (Bacchi et al, 1999;Kothari & Sharma, 2010), which are increased upon complexation with certain transition metals (Wu et al, 2009;Bikas et al, 2015). The synthesis of high nuclearity complexes of transition metals derived from these types of ligands are highly targeted because of their magnetic (Sow et al, 2013;Zhang et al, 2014a;Dragancea et al, 2014), catalytic (Bikas et al, 2015), biological (Zhang et al, 2014) and optical (Easwaran potti et al, 2007) properties. Recently, our research group synthesized a new tetranuclear grid complex [Zn 4 (HL 1 ) 4 ](NO 3 ) 4 Á2H 2 O where H 2 L 1 is 1,5-bis[1-(pyridin-2yl)ethylidene)carbonohydrazide].…”

Section: Chemical Contextmentioning

confidence: 99%

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Diaquabis{μ-1,5-bis[(pyridin-2-yl)methylidene]carbonohydrazide(1–)}di-μ-chlorido-tetrachloridotetrazinc(II)

Seck¹,

Gaye²,

Ndoye³

et al. 2020

Acta Cryst E

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A tetranuclear ZnII complex, [Zn4(C13H11N6O)2Cl6(H2O)2] or {[Zn2(HL)(H2O)(Cl2)](μCl)2[Zn2(HL)(H2O)(Cl)]}2, was synthesized by mixing an equimolar amount of a methanol solution containing ZnCl2 and a methanol solution containing the ligand H2 L [1,5-bis(pyridin-2-ylmethylene)carbonohydrazide]. In the tetranuclear complex, each of the two ligand molecules forms a dinuclear unit that is connected to another dinuclear unit by two bridging chloride anions. In each dinuclear unit, one ZnII cation is pentacoordinated in a N2OCl2 in a distorted square-pyramidal geometry, while the other ZnII cation is hexacoordinated in a N3OCl2 environment with a distorted octahedral geometry. The basal plane around the pentacoordinated ZnII cation is formed by one chloride anion, one oxygen atom, one imino nitrogen atom and one pyridine nitrogen atom with the apical position occupied by a chloride anion. The basal plane of the hexacoordinated ZnII cation is formed by one chloride anion, one hydrazinyl nitrogen atom, one imino nitrogen atom and one pyridine nitrogen atom with the apical positions occupied by a water oxygen atom and a bridged chloro anion from another dinuclear unit, leading to a tetranuclear complex. A series of intramolecular C—H...Cl hydrogen bonds is observed in each tetranuclear unit. In the crystal, the tetranuclear units are connected by intermolecular C—H...Cl, C—H...O and N—H...O hydrogen bonds, forming a planar two-dimensional structure in the ac plane.

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Synthesis, spectral characterization and X-ray crystal structure of Fe(III) and Co(III) complexes with an acyclic Schiff base ligand

Cited by 7 publications

References 37 publications

Synthesis, Spectroscopic Studies and X-Ray Diffraction of Heptacoordinated Mn(II) and Co(II) Complexes with Ligands Derived from Carbonohydrazide

Synthesis, Spectroscopic Studies and X-Ray Diffraction of Heptacoordinated Mn(II) and Co(II) Complexes with Ligands Derived from Carbonohydrazide

Mononuclear Co(III), Ni(II) and Cu(II) complexes of tridentate di‐tert‐butylphenylhydrazone: Synthesis, characterization, X‐ray crystal structures, Hirshfeld surface analysis, molecular docking and in vivo anti‐inflammatory activity

Diaquabis{μ-1,5-bis[(pyridin-2-yl)methylidene]carbonohydrazide(1–)}di-μ-chlorido-tetrachloridotetrazinc(II)

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