Formation and Analysis of Cobalt III with a Tetradentate N,N,O,O Donor Ligand
2Formation 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)
Layman Abstract : In simple terms, this paper discusses a new chemical compound that was created by reacting a specific organic molecule (called a Schiff base) with a cobalt ion (Co(III)). Schiff bases are molecules that can bond with metals like cobalt and have many uses, especially in biology and chemistry. The Schiff base used here contains specific functional groups (nitrogen, sulfur, and oxygen) that help it attach to the metal.
The main focus is on the structure of the new complex formed with cobalt. The cobalt ion is surrounded by various atoms from the Schiff base ligand and water molecules, forming a stable structure known as a coordination complex. The study also provides detailed measurements of the complex’s structure using advanced techniques like X-ray diffraction and spectroscopy.
The cobalt complex in question has a specific shape (slightly distorted octahedral) and is made up of a metal ion bonded to two nitrogen atoms and two oxygen atoms, as well as water molecules and other small chemical groups. This type of complex can be important for various chemical and biological applications. The paper highlights the method of preparation, the detailed structure, and the properties of the complex, which were confirmed using several different testing methods.
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Original Abstract : 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.
View Book: https://doi.org/10.9734/bpi/cmsdi/v10/4156
#Schiff_base #xray #bicompartmental #tetradentate #perchlorate