European Journal of Chemistry 2019, 10(3), 201-208. doi:10.5155/eurjchem.10.3.201-208.1881

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


Pokpa Haba (1) orcid , Adama Sy (2) orcid , Farba Bouyagui Tamboura (3) orcid , Mamour Sarr (4) orcid , Ibrahima Elhadji Thiam (5) orcid , Aliou Hamady Barry (6) orcid , Mohamed Lamine Sall (7) orcid , Mohamed Gaye (8,*) orcid , Pascal Retailleau (9) orcid

(1) Department of Chemistry, University Cheikh Anta Diop, Dakar, 10700, Sénégal
(2) Department of Chemistry, University Cheikh Anta Diop, Dakar, 10700, Sénégal
(3) Department of Chemistry, University Cheikh Anta Diop, Dakar, 10700, Sénégal
(4) Department of Chemistry, University Cheikh Anta Diop, Dakar, 10700, Sénégal
(5) Department of Chemistry, University Cheikh Anta Diop, Dakar, 10700, Sénégal
(6) Department of Chemistry, University of Nouakchott, Nouakchott, 130301, Mauritania
(7) Department of Chemistry, University Cheikh Anta Diop, Dakar, 10700, Sénégal
(8) Department of Chemistry, University Cheikh Anta Diop, Dakar, 10700, Sénégal
(9) 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
(*) Corresponding Author

Received: 15 Apr 2019, Accepted: 05 Jul 2019, Published: 30 Sep 2019

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.


Keywords


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

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DOI: 10.5155/eurjchem.10.3.201-208.1881

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How to cite


Haba, P.; Sy, A.; Tamboura, F.; Sarr, M.; Thiam, I.; Barry, A.; Sall, M.; Gaye, M.; Retailleau, P. Eur. J. Chem. 2019, 10(3), 201-208. doi:10.5155/eurjchem.10.3.201-208.1881
Haba, P.; Sy, A.; Tamboura, F.; Sarr, M.; Thiam, I.; Barry, A.; Sall, M.; 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(3), 201-208. doi:10.5155/eurjchem.10.3.201-208.1881
Haba, P., Sy, A., Tamboura, F., Sarr, M., Thiam, I., Barry, A., Sall, M., Gaye, M., & Retailleau, P. (2019). 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, 10(3), 201-208. doi:10.5155/eurjchem.10.3.201-208.1881
Haba, Pokpa, Adama Sy, Farba Bouyagui Tamboura, Mamour Sarr, Ibrahima Elhadji Thiam, Aliou Hamady Barry, Mohamed Lamine Sall, Mohamed Gaye, & Pascal Retailleau. "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 [Online], 10.3 (2019): 201-208. Web. 23 Oct. 2019
Haba, Pokpa, Sy, Adama, Tamboura, Farba, Sarr, Mamour, Thiam, Ibrahima, Barry, Aliou, Sall, Mohamed, Gaye, Mohamed, AND Retailleau, Pascal. "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 [Online], Volume 10 Number 3 (30 September 2019)

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

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