Syntheses, Characterization, and X-ray Crystal Structure of Mn(III) Coordination Polymer of 2-((2-Hydroxyethylimino) Methyl)-6-Methoxyphenol
Momath Kebe
Department of Chemistry, University Cheikh Anta Diop, Dakar 10700, Senegal.
Bocar Traore
Department of Chemistry, University Cheikh Anta Diop, Dakar 10700, Senegal.
Mbossé Ndiaye-Guèye
Department of Chemistry, University Cheikh Anta Diop, Dakar 10700, Senegal.
Ibrahima Elhadj Thiam
Department of Chemistry, University Cheikh Anta Diop, Dakar 10700, Senegal.
Pascal Retailleau
Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université, Paris-Saclay, 1 av. de la Terrasse, 91198 Gif-sur-Yvette, France.
Mohamed Gaye *
Department of Chemistry, University Cheikh Anta Diop, Dakar 10700, Senegal.
*Author to whom correspondence should be addressed.
Abstract
The present investigation describes the synthesis of the ligand 2-((2-hydroxyethylimino)methyl)-6-methoxyphenol (H2L) and its complex of Mn(III) cation. The structure of the compound was elucidated by spectroscopic study and X-ray diffraction for the complex formulated as [{Mn(μ–HL)2}(C2N3)]n. The complex crystallizes in the monoclinic space group P21/n with the following unit cell parameters: a = 5.8172 (3) Å, b = 11.8695 (7) Å, c = 17.2616 (11) Å, b = 96.565 (6)°, V = 1178.57 (12) Å3, Z = 2, R1 = 0.0603 and wR2 = 0.1516. For this compound, the structure reveals that two monodeprotonated ligand interact with one Mn(III) in bidentate fashion while the third coordination site of the ligand interact with another Mn(III) of a neighboring unit. Thus, a polymeric coordination complex is obtained. The Mn(III) is hexacoordinated and the coordination environment can be described as slightly distorted octahedral geometry. Numerous hydrogen bonds link the molecules into three-dimensional network.
Keywords: Schiff base, complex, octahedral, manganese, polymer