Synthesis, spectroscopic and magnetic properties of three dinuclear copper(II) complexes [Cu2(2-amino-4-methylpyrimidine)4(OH)2](X)2, where X =  , or

Nassirinia, Nassim; Shahmoradi, Ghasem; Sadeghy, Nasrin; Amani, Saeid

doi:10.1080/00958970701286250

Cited by 3 publications

(1 citation statement)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Te in vitro antibacterial sensitivity of each of the complexes was tested using the disc difusion method [20]. Nutrient agar medium (28 g) in 1000 ml of distilled H 2 O was then poured into Petri discs and allowed to solidify for 15 min in a sterilized zone, and plates were incubated overnight with the following bacterial strains: Bacillus Subtilis (+ve) and Escherichia coli, Pseudomonas aeruginosa (-ve).…”

Section: Antibacterial Assignmentmentioning

confidence: 99%

New Nanosized V(III), Fe(III), and Ni(II) Complexes Comprising Schiff Base and 2-Amino-4-Methyl Pyrimidine: Synthesis, Properties, and Biological Activity

Al-Fakeh,

Alsikhan,

Alnawmasi

et al. 2024

International Journal of Biomaterials

View full text Add to dashboard Cite

A new synthesis of mixed ligand complexes vanadium(III), iron(III), and nickel(II), [M : L1 : L2], where L1 = Schiff base 2-((E)-((4-(((E)-benzylidene)amino)phenyl)imino)methyl)-naphthalene-1-ol (C24H18N2O) as for L2 = AMPY 2-amino-4-methyl pyrimidine (C5H7N3) were prepared in powder and investigated. Element analysis, molar conductivity, FT-IR, UV-vis, and magnetic susceptibility values have been acquired to describe the generated complexes. The values of vanadium(III), iron(III), and nickel(II) compounds are, respectively, 2.88 BM, 5.96 BM, and 2.92 BM, demonstrating that all compounds conform to the recommended octahedral geometry. Thermal gravimetric analysis (TGA) is used to further assess the complexes and establish the temperature stability and degradation of the metal complexes. The calculations abstracted from XRD patterns propose nanosized complexes (average size 29–50 nm). The microstructures of the samples have also been investigated by scanning electron microscopy (SEM). The disc diffusion method was used to assess and analyze the inhibition of the growth of compounds against harmful bacterial and fungal strains. The prepared complexes were tested against three strains of bacteria, one gram-positive strain (Bacillus subtilis), two gram-negative strains (Escherichia coli and Pseudomonas aeruginosa), and one fungus (Aspergillus fumigatus). The complexes inferred antimicrobial activity against the studied organisms. Specifically, vanadium(III) and nickel(II) are more effective than iron(III), making them promising drugs.

show abstract

Section: Antibacterial Assignmentmentioning

confidence: 99%

New Nanosized V(III), Fe(III), and Ni(II) Complexes Comprising Schiff Base and 2-Amino-4-Methyl Pyrimidine: Synthesis, Properties, and Biological Activity

Al-Fakeh,

Alsikhan,

Alnawmasi

et al. 2024

International Journal of Biomaterials

View full text Add to dashboard Cite

show abstract

Copper

Smith

2008

Annu. Rep. Prog. Chem., Sect. A: Inorg. Chem.

View full text Add to dashboard Cite

This chapter reviews the literature during 2007 on the chemistry of copper. HighlightsThe homoleptic species [Cu(Z 2 -C 2 H 4 ) 3 ] + and [Cu(Z 2 -P 4 ) 2 ] + have been characterised. 1e The consequences of symmetric vs. asymmetric coordination of the metal centres in dicopper(I) complexes have been explored. 3a-e Among mixed-valence heteronuclear chemistry, a giant M 45 cluster containing Cu I , Cu II , Mn II , Mn III and Mn IV has T d symmetry and an S = 51/2 ground state. 7g 'Catalytic promiscuity' has been revealed in a dicopper(II) complex, 17e while unique rectangular bridging by chloride occurs in a tetracopper(II) cluster. 22f This has been a vintage year for copper(III) chemistry, with the isolation of hitherto elusive Cu III intermediates in organic conjugation addition reactions 27a-c and of heterobimetallic {Cu III (m-O) 2 M II } species. 27e Copper(I) chemistry Mononuclear speciesCoverage here follows the Group numbers of the donor atoms in the ligands of primary interest. Complexes [CuL(NCMe)][BF 4 ], where L is an N-heterocycle, catalyse the diboration of styrene via bis(catecholato)diboron; DFT calculations indicate intermediates with trigonal CuNB 2 coordination. 1a The mechanism of copper(I)-catalysed azide-alkyne cycloaddition involves formation of Cu-CRCR complexes. 1b A similar reaction enables the template syntheses of [2]-and [3]-rotaxanes, 1c and a copper(I) triazolide complex has been isolated from the cyclisation step. 1d The [Cu(Z 2 -C 2 H 4 ) 3 ] + and [Cu(Z 2 -P 4 ) 2 ] + ions are stabilised by [Al{OC(CF 3 ) 3 } 4 ] À . 1e63 Cu and 65 Cu NMR spectroscopy is proving useful in the characterisation of copper(I) complexes with N and P-donor ligands. 2a-c DFT calculations suggest that copper(I) prefers a mixture of hard and soft ligands; maximum hardness for [Cu(NH 3 ) n (PH 3 ) 4Àn ] + was found for n = 1. 2d Excited state structural dynamics have been studied in an MLCT state of [Cu(2,9-Me 2 phen) 2 ] + , 2e-f while equilibration among three MLCT states has been found in similar complexes with bulkier substituents. 2g Copper(I) complexes with phen-type ligands tethered to a cyclotriphosphazene platform have been characterised. 2h Rotaxanes and pseudorotaxanes assembled from bis(phen)copper(I) species have been examined as molecular machines. 2i-k The cation in [Cu(PhNO) 3 ][PF 6 ] is implicated in the copper(I)-catalysed allylic amination of olefins. 2l Redox activity, absent in two-coordinate copper(I) complexes with His-His, appears with coordination of a third ligand. 2m A new geometric index for four-coordination is proposed on the basis of the structures of

show abstract

Synthesis, crystal structures and magnetic properties of dinuclear copper(ii) compounds with NNO tridentate Schiff base ligands and bridging aliphatic diamine and aromatic diimine linkers

et al. 2011

View full text Add to dashboard Cite

The synthesis and the characterization of new dinuclear copper(II) compounds of general formula [(L(a-d))(2)Cu(2)(μ-N-N)](ClO(4))(2) (1-6) with either neutral aliphatic diamine (N-N = piperazine, pip) or aromatic diimine (N-N = 4,4'-bipyridine, 4,4'-bipy) linker are reported. The copper ligands L(-) (L(a-) = (E)-2-((2-aminoethylimino)methyl)phenolate, L(b-) = (E)-2-((2-aminopropylimino)methyl)-phenolate, L(c-) = (E)-2-((2-aminoethylimino)methyl)4-nitrophenolate, L(d-) = (E)-2-((2-aminoethylimino)methyl)4-methoxyphenolate) are NNO tridentate Schiff bases derived from the monocondensation of a substituted salicylaldehyde 5-G-salH (G = NO(2), H, OMe) with ethylenediamine, en, or 1,3-propylenediamine, tn. The crystal structures of compounds [(L(a))(2)Cu(2)(MeOH)(2)(μ-4,4'-bipy)](ClO(4))(2) (1·2MeOH), [(L(b))(2)Cu(2)(MeOH)(2)(μ-4,4'-bipy)](ClO(4))(2) (2·2MeOH), [(L(d))(2)Cu(2)(μ-4,4'-bipy)](ClO(4))(2) (4), [(L(a))(2)Cu(2)(μ-pip)](ClO(4))(2) (5) and [(L(b))(2)Cu(2)(μ-pip)](ClO(4))(2) (6) have been determined, revealing the preferred (e-e)-chair conformation of the bridging piperazine in compounds 5 and 6. The presence of hydrogen-bond-mediated intermolecular interactions, that involve the methanol molecules, yields dimers of dinuclear units for 1·2MeOH, and infinite zig-zag chains for 2·2MeOH. The temperature dependences of the magnetic susceptibilities χ(M)(T) for all compounds were measured, indicating the presence of antiferromagnetic Cu-Cu exchange. For the compounds 2-4 with 4,4'-bipy, the coupling constants J are around -1 cm(-1), while in compound 1 no interaction could be detected. The compounds 5 and 6 with piperazine display higher Cu-Cu magnetic interactions through the σ-bonding backbone of the bridging molecule, with J around -8 cm(-1), and the coupling is favoured by the (e-e)-chair conformation of the diamine ring. The non-aromatic, but shorter, linker piperazine gives rise to stronger Cu-Cu antiferromagnetic couplings than the aromatic, but longer, 4,4'-bipyridine. In the latter case, the rotation along the C-C bond between the two pyridyl rings and the consequent non co-planarity of the two copper coordination planes play an important role in determining the magnetic communication. EPR studies reveal that the dinuclear species are not stable in solution, yielding the solvated [(L)Cu(MeOH)](+) and the mononuclear [(L)Cu(N-N)](+) species; it appears that the limited solubility of the dinuclear compounds is responsible for their isolation in the solid state.

show abstract

Synthesis, spectroscopic and magnetic properties of three dinuclear copper(II) complexes [Cu₂(2-amino-4-methylpyrimidine)₄(OH)₂](X)₂, where X = , or

Cited by 3 publications

References 34 publications

New Nanosized V(III), Fe(III), and Ni(II) Complexes Comprising Schiff Base and 2-Amino-4-Methyl Pyrimidine: Synthesis, Properties, and Biological Activity

New Nanosized V(III), Fe(III), and Ni(II) Complexes Comprising Schiff Base and 2-Amino-4-Methyl Pyrimidine: Synthesis, Properties, and Biological Activity

Copper

Synthesis, crystal structures and magnetic properties of dinuclear copper(ii) compounds with NNO tridentate Schiff base ligands and bridging aliphatic diamine and aromatic diimine linkers

Contact Info

Product

Resources

About