Formation and Analysis of Cobalt (III) with a Tetradentate N,N,O,O-Donor Ligand and 2,2'-{Propane-1,2-diyl-bis[Nitrilo(E) Methylidene]}bis(6-Methoxyphenol) | Chapter 5 | Chemical and Materials Sciences: Developments and Innovations Vol. 10

For a long time, chelating agents derived from organic compounds containing N,S,O-donor as a functional group have a strong ability to form metal complexes and exhibit a variety of biological activities. A number of studies have been done on the various Schiff base complexes formed by the condensation of secondary amines with different aldehydes and ketones. Schiff bases have often been used as chelating ligands in the field of coordination chemistry, and their metal complexes have been extensively investigated due to their potential applications. It is known that reactions of N,N,O,O-donor Schiff base ligands with transition metal ions have produced a series of complexes with interesting structures and magnetic properties. A new complex prepared by the reaction of 2,2'-{propane-1,2- diyl-bis[nitrilo(E)methylidene]}bis(6-methoxyphenol) (H2L) with Co(III) ion is reported in this paper. The bicompartmental ligand acts in a tetradentate fashion. The H2L ligand is structurally characterized by elemental analysis, NMR and infrared spectroscopies, conductance and single X-ray diffraction.

The compound with Co(III) crystallizes in the monoclinic system in the space group P2₁/c with the unit cell parameters a = 13.168(2) Å, b = 15.795(2) Å, c = 15.882(2) Å, α = 90°, β = 110.703(16)°, γ = 90°. The cobalt (III) ion has a slightly distorted octahedral coordination geometry.

In the structure of the mononuclear complex, the Co(III) cation is coordinated by two imine nitrogen atoms, two phenoxo oxygen atoms, from deprotonated Schiff base ligand and two oxygen atoms of water. There are also neighboring two molecules of DMF and one perchlorate anion non-coordinating. The study concluded that the structure revealed tetradentate coordination of the ligand via two nitrogen atoms and two deprotonated phenolicoxygen atoms. In this complex, the central metal center is hexacoordinated. This complex is characterized by spectroscopic studies (IR, NMR), molar conductivity and X-ray diffraction.

 

Author (s) Details

Alassane Saidou Diallo
Department of Chemistry, UFR SATIC, Alioune DIOP University, Bambey, Senegal.

 

Mariama Sarr
Department of Chemistry, UFR SATIC, Alioune DIOP University, Bambey, Senegal.

 

Mbosse Ndiaye Gueye
Department of Chemistry, Cheikh Anta Diop University, Dakar, Senegal.

 

Antoine Blaise Kama
Department of Chemistry, UFR SATIC, Alioune DIOP University, Bambey, Senegal.

 

Farba Bouyagui Tamboura
Department of Chemistry, UFR SATIC, Alioune DIOP University, Bambey, Senegal.

 

Ibrahima Elhadj Thiam
Department of Chemistry, Cheikh Anta Diop University, Dakar, Senegal.

 

Moussa Dieng
Department of Chemistry, UFR SATIC, Alioune DIOP University, Bambey, Senegal.

 

Mohamed Gaye
Department of Chemistry, Cheikh Anta Diop University, Dakar, Senegal.

 

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