Synthesis, characterization and antimicrobial studies of novel ONO donor hydrazone Schiff base complexes with some divalent metal (II) ions

Bhaskar, Ravindra; Ladole, Chandarshekhar; Salunkhe, Nilesh; Barabde, Jagruti; Aswar, A. S.

doi:10.1016/j.arabjc.2020.06.012

Cited by 37 publications

(16 citation statements)

References 45 publications

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“…The electronic spectrum of Ni (II) (1c) complex exhibited three bands in the region 10631, 17145 and 24254 cm -1 are attributed to 3 A2g(F)  3 T2g(F)(1), 3 A2g(F)  3 T1g (F) (2) and 3 A2g(F)  3 T1g (P) (3) transitions respectively. Moreover, the 2/1 ratio in the range of 1.56-1.61 is indicative of octahedral stoichiometry for the Ni(II) (1c) complex [18,19]. The magnetic moment value for 1c complex is 2.98 B.M, which is in well agreement with the expected value for octahedral geometry around the central metal ion [20].…”

Section: Electronic and Magnetic Susceptibility Datasupporting

confidence: 59%

“…The electronic spectrum of Co (II) (1b) complex displayed three well defined bands in the region 8646 cm -1 , 17144 cm -1 & 20612 cm -1 due to the 4 T1g(F)  4 T2g (F) (1), 4 T1g(F)  4 A2g (F) (2) and 4 T1g(F)  4 T1g (P) (3) transitions respectively. These transitions also suggest the octahedral geometry for 1b complex [18]. The measured magnetic moment value for 1b is 4.77 B.M, which suggests octahedral geometry.…”

Section: Electronic and Magnetic Susceptibility Datamentioning

confidence: 71%

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Synthesis, Characterization, Fluorescence and Antimicrobial studies of Cu(II), Co(II), Ni(II), Zn(II) and Cd(II) complexes derived from Schiff’s base (E)-2-(5-chloro-2-hydroxybenzylidene)-N-(4-phenylthiazol-2-yl)hydrazinecarboxamide

Rahaman¹,

Gupta²,

Gautam³

et al. 2021

JUSST

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A series of Cu(II), Co(II), Ni(II), Zn(II) and Cd(II) complexes of (E)-2-(5-chloro-2-hydroxybenzylidene)-N-(4-phenylthiazol-2-yl)hydrazinecarboxamide (HL) with ONO donor ligand was synthesized. The ligand (HL) was prepared by the condensation of N-(4-phenylthiazol-2-yl)hydrazinecarboxamide with 5-chloro-2-hydroxybenzaldehyde. The HL and its metal complexes have been characterized using elemental analysis and various spectral techniques such as, FTIR, 1H and 13C NMR, Mass, UV–Visible, ESR, thermal analysis (TGA), magnetic moment, conductivity and powder-XRD. The Powder XRD pattern indicates hexagonal or tetragonal system for HL and its metal complexes. The fluorescence studies exhibits strong emission in the range of 400-500 nm for HL. Further in comparison the HL, Zn(II) and Cd(II) complexes showed enhanced emission whereas Cu(II), Co(II) and Ni(II) showed poor emission. The antimicrobial activities of the HL and its metal complexes were studied by minimum inhibitory concentration (MIC) method wherein the metal complexes showed better activity as compare to free ligand.

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Section: Electronic and Magnetic Susceptibility Datasupporting

confidence: 59%

Section: Electronic and Magnetic Susceptibility Datamentioning

confidence: 71%

Synthesis, Characterization, Fluorescence and Antimicrobial studies of Cu(II), Co(II), Ni(II), Zn(II) and Cd(II) complexes derived from Schiff’s base (E)-2-(5-chloro-2-hydroxybenzylidene)-N-(4-phenylthiazol-2-yl)hydrazinecarboxamide

Rahaman¹,

Gupta²,

Gautam³

et al. 2021

JUSST

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“…The molar conductivities of the complexes in DMF (10 −3 M) were obtained in the range of 19.4–23.8 cm 2 Ω −1 mol −1 at room temperature, confirming their nonelectrolyte nature, and thus indirectly prove binding of both halide/pseudohalide ions and Schiff base ligand to metal ion center. [ 43–45 ] The Schiff base ligand is melted at 147°C while decomposition temperature of the cadmium(II) complexes is in the range of 183–234°C.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, crystal structure, Hirshfeld surface analyses, antimicrobial activity, and thermal behavior of some novel nanostructure hexa‐coordinated Cd(II) complexes: Precursors for CdO nanostructure

Akbari

Montazerozohori

Hoseini

et al. 2021

Applied Organom Chemis

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A new tetradentate Schiff base ligand entitled as (L = (N2E, N2′E)‐N1, N1′‐(ethane‐1,2‐diyl)bis(N2‐((E)‐3‐(2‐nitrophenyl)allylidene)ethane‐1,2‐diamine) and its six cadmium(II) complexes formulated as CdLX2 in which X is Cl, Br, I, NO3, NCS, or N3 were synthesized under ultrasound irradiation and characterized by various physical and spectral techniques. Moreover, some complexes were also prepared in nanostructured dimensions confirmed by scanning electron microscopy (SEM), energy dispersive X‐ray analysis (EDXA), and X‐ray powder diffraction (XRPD) techniques and then were used as precursor for preparation of CdO nanoparticles via direct calcination at 600°C. As typical, the crystal structure of cadmium(II) nitrate complex was determined using single crystal X‐ray diffraction. Accordingly, it was found that [Cd(L)(NO3)2] complex crystallizes in the monoclinic space group P21/n with two independent molecules in the asymmetric unit with two coordination modes of nitrate anions. This complex has zero‐dimensional (0D) coordination supramolecular structure. Hirshfeld surface analyses suggested that H … O (49.5%), H … H (30.3%), and H … C (11.8%) intermolecular interactions are most considerable in the crystal packing. Computational studies of ligand structure leading to electrostatic potentials of the solid state geometry and some occupied molecular orbitals (HOMO, HOMO‐1, HOMO‐2, and HOMO‐5) prevailing the contribution of nitrogen lone pairs are also reported. Thermal behavior studies of the compounds under nitrogen atmosphere from room temperature to 900°C revealed that the ligand is completely decomposed without any residual whereas the complexes are decomposed via two to four thermal steps with trace amount of metallic cadmium as residue. Moreover, antibacterial and antifungal screening well showed that the complexes inhibit from the growth of the various bacteria and fungi more efficient than free ligand especially against Gram‐positive bacteria. DNA cleavage potentials of the compounds may be one of the reasons for their antimicrobial activity.

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“…These complexes often exhibit important properties for industries such as magnetism [15], luminescence [16], catalysis [17], and optics [18]. These metal transition coordination compounds obtained with hydrazone ligands are also studied because of their broad profile in the pharmacological field, with antitumor [19], antimicrobial [20,21] and anti-tuberculosis [22] potential. It has been shown that hydrazone ligands with biological properties can see their activity increased after complexation with metal ions.…”

Section: Introductionmentioning

confidence: 99%

Crystal structures of bis-{N-[1-(pyridin-2-yl-κN)ethylidene]nicotine hydrazide-κ2N’,O}cobalt(II)bis(perchlorate) dihydrate and bis-{N'-[1-(pyridin-2-yl-κN)ethylidene]nicotinohydrazide-κ2N',O}copper(II) perchlorate

et al. 2021

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Complexes of Co(II), [Co(C26H24N8O2)]·(ClO4)2·(H2O)2 (1), and Cu(II), [Cu(C26H23N8O2)]·(ClO4) (2), have been synthesized. The prepared two compounds were characterized by elemental analysis, infrared and their structures were determined by single-crystal X-ray diffraction. The compound 1 crystallizes in the triclinic space group P-1 with the following unit cell parameters: a = 8.880 (5) Å, b = 10.529 (5) Å, c = 18.430 (5) Å, α = 99.407 (5)°, β = 102.174 (5)°, γ = 100.652 (5)°, V = 1618.2 (13) Å3, Z = 2, T = 293(2), μ(MoKα) = 0.77 mm-1, Dcalc = 1.582 g/cm3, 16135 reflections measured (5.050° ≤ 2q ≤ 59.152°), 7648 unique, Rint = 0.034 which were used in all calculations. The final R1 was 0.066 (I ≥ 2σ(I)) and wR2 was 0.22 (all data). The compound 2 crystallizes in the monoclinic space group P21/c with the following unit cell parameters : a = 11.652 (5) Å, b = 16.540 (5) Å, c = 14.512 (5) Å, β = 93.495 (5)°, V = 2791.6 (18) Å3, Z = 4, T = 293(2), μ(MoKα) = 1.05 mm-1, Dcalc = 1.768 g/cm3, 15592 reflections measured (5.624° ≤ 2θ ≤ 58.804°), 6630 unique, Rint = 0.025 which were used in all calculations. The final R1 was 0.050 (I ≥ 2σ(I)) and wR2 was 0.144 (all data). In both complexes, the ligand acts in a tridentate fashion. In the structure of the mononuclear complex 1, the Co(II) cation is coordinated by two ligand molecules. The basal plane around the Co(II) cation is occupied by two pyridine nitrogen atoms and two carbonyl oxygen atoms. Two imino nitrogen atoms occupy the apical positions of the distorted square-pyramidal geometry. The mononuclear 2 consists of a Cu(II) coordinated by one ligand and one monodeprotonated ligand molecule. The metal center lies in a distorted square bipyramidal environment. The basal plane around the Cu(II) is occupied by two pyridine nitrogen atoms and two carbonyl oxygen atoms, the apical position being occupied by the two imino nitrogen atoms.

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Synthesis, characterization and antimicrobial studies of novel ONO donor hydrazone Schiff base complexes with some divalent metal (II) ions

Cited by 37 publications

References 45 publications

Synthesis, Characterization, Fluorescence and Antimicrobial studies of Cu(II), Co(II), Ni(II), Zn(II) and Cd(II) complexes derived from Schiff’s base (E)-2-(5-chloro-2-hydroxybenzylidene)-N-(4-phenylthiazol-2-yl)hydrazinecarboxamide

Synthesis, Characterization, Fluorescence and Antimicrobial studies of Cu(II), Co(II), Ni(II), Zn(II) and Cd(II) complexes derived from Schiff’s base (E)-2-(5-chloro-2-hydroxybenzylidene)-N-(4-phenylthiazol-2-yl)hydrazinecarboxamide

Synthesis, crystal structure, Hirshfeld surface analyses, antimicrobial activity, and thermal behavior of some novel nanostructure hexa‐coordinated Cd(II) complexes: Precursors for CdO nanostructure

Crystal structures of bis-{N-[1-(pyridin-2-yl-κN)ethylidene]nicotine hydrazide-κ2N’,O}cobalt(II)bis(perchlorate) dihydrate and bis-{N'-[1-(pyridin-2-yl-κN)ethylidene]nicotinohydrazide-κ2N',O}copper(II) perchlorate

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