Synthesis, spectroscopic studies and X-ray structure determination of two mononuclear copper complexes derived from the Schiff base ligand N,N-dimethyl-N'-((5-methyl-1H-imidazol-4-yl)methylene)ethane-1,2-diamine | European Journal of Chemistry

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Published: Sep 30, 2019

DOI: https://doi.org/10.5155/eurjchem.10.3.201-208.1881

Keywords:

Complex, Schiff base, Thiocyanate, Mononuclear, Square pyramidal, Single crystal structure

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Research Article

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Vol. 10 No. 3 (2019): September 2019

Dates

Received 2019-04-15
Accepted 2019-07-05
Published 2019-09-30

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Pokpa Haba

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Department of Chemistry, University Cheikh Anta Diop, Dakar, 10700, Sénégal

http://orcid.org/0000-0002-9935-0515

Adama Sy

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Department of Chemistry, University Cheikh Anta Diop, Dakar, 10700, Sénégal

http://orcid.org/0000-0002-3178-0148

Farba Bouyagui Tamboura

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Department of Chemistry, University Cheikh Anta Diop, Dakar, 10700, Sénégal

http://orcid.org/0000-0002-1108-0718

Mamour Sarr

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Department of Chemistry, University Cheikh Anta Diop, Dakar, 10700, Sénégal

http://orcid.org/0000-0003-1736-951X

Ibrahima Elhadji Thiam

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Department of Chemistry, University Cheikh Anta Diop, Dakar, 10700, Sénégal

http://orcid.org/0000-0002-4595-8445

Aliou Hamady Barry

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Department of Chemistry, University of Nouakchott, Nouakchott, 130301, Mauritania

http://orcid.org/0000-0003-4869-2993

Mohamed Lamine Sall

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Department of Chemistry, University Cheikh Anta Diop, Dakar, 10700, Sénégal

http://orcid.org/0000-0003-2357-5811

Mohamed Gaye

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Department of Chemistry, University Cheikh Anta Diop, Dakar, 10700, Sénégal

http://orcid.org/0000-0001-8989-1548

Pascal Retailleau

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Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, av. de la Terrasse, 91198 Gif-sur-Yvette, France

http://orcid.org/0000-0003-3995-519X

Abstract

Reactions of the Schiff base N,N-dimethyl-N'-((5-methyl-1H-imidazol-4-yl)methylene) ethane-1,2-diamine (HL), synthesised in situ, with chloride or thiocyanate copper (II) salt; afforded two new mononuclear complexes, [Cu(HL)Cl₂]·H₂O (1) and [Cu(HL)(SCN)₂] (2). These compounds have been studied and characterized by elemental analysis, IR and UV-Vis spectroscopies, electrochemistry, molar conductivity and room temperature magnetic measurements. Single crystal X-ray structure determination of the complexes revealed the presence of neutral moieties in the asymmetric unit. The mononuclear (1) crystallises in the monoclinic space group P2₁/c with the following unit cell parameters a = 7.4355(3) Å, b = 7.2952(3) Å, c = 26.2729(11) Å, β = 93.461(4)°, V = 1422.52(10) Å³, Z = 4, R₁ = 0.033 and wR₂ = 0.082 and the mononuclear complex (2) crystallises in the monoclinic space group C2/c with the following unit cell parameters a = 26.2578(7) Å, b = 7.4334(2) Å, c = 16.6237(5) Å, β = 99.089(3)°, V = 3203.95(16) Å³, Z = 8, R₁ = 0.037 and wR₂ = 0.104. In both complexes the ligand acts in tridentate fashion and the coordination environment of the copper atom can be described as distorted square pyramidal. The crystal lattice of the complex 1 is stabilized by electrostatic forces of attraction and O–H···Cl, C–H···O, N–H···Cl, and C–H···Cl, hydrogen bonding interactions while the crystal lattice of the complex 2 is stabilized by N–H···S and C–H···N.

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Haba, P.; Sy, A.; Tamboura, F. B.; Sarr, M.; Thiam, I. E.; Barry, A. H.; Sall, M. L.; Gaye, M.; Retailleau, P. Synthesis, Spectroscopic Studies and X-Ray Structure Determination of Two Mononuclear Copper Complexes Derived from the Schiff Base Ligand N,N-Dimethyl-N’-(5-Methyl-1H-Imidazol-4-yl)methylene)ethane-1,2-Diamine. Eur. J. Chem. 2019, 10, 201-208.

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