{"title":"Synthesis, characterization and crystal structure of a dodeca-nuclear cobalt (II)cube-octahedron","authors":"R. M. Elmehdawi","doi":"10.13171/mjc02301161661elmehdawi","DOIUrl":null,"url":null,"abstract":"<p>The new cobalt (II) complex, [Co<sub>12 </sub>(cpip)<sub>12</sub>(H<sub>2</sub>O)<sub>12</sub>].18.56H<sub>2</sub>O where H<sub>2</sub>cpip = 2-(carboxy-phenyl) amino-propanoic acid, was isolated as pink-like prism crystals from the reaction of Co(NO<sub>3</sub>)<sub>2</sub>.6H<sub>2</sub>O and H<sub>2</sub>cpip in an ethanolic solution. The complex was characterized by Fourier Transform Infrared Spectroscopy (FTIR) and X-ray single-crystal diffraction. The symmetric unit of the title complex contains twelve cobalt atoms arranged in a cube-octahedron. Each divalent cation of cobalt is iso-octahedrally coordinated to four oxygen atoms of two cpip2- ligands in the equatorial plane. The axial plane is occupied by an amino nitrogen atom of one of the cpip2- ligands and an oxygen atom of a water molecule. The lattice water molecule in the metallocycle cavity involved OHO hydrogen bonding with the coordinated water molecules.</p>","PeriodicalId":18513,"journal":{"name":"Mediterranean Journal of Chemistry","volume":"15 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2023-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Mediterranean Journal of Chemistry","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.13171/mjc02301161661elmehdawi","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
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Abstract
The new cobalt (II) complex, [Co12 (cpip)12(H2O)12].18.56H2O where H2cpip = 2-(carboxy-phenyl) amino-propanoic acid, was isolated as pink-like prism crystals from the reaction of Co(NO3)2.6H2O and H2cpip in an ethanolic solution. The complex was characterized by Fourier Transform Infrared Spectroscopy (FTIR) and X-ray single-crystal diffraction. The symmetric unit of the title complex contains twelve cobalt atoms arranged in a cube-octahedron. Each divalent cation of cobalt is iso-octahedrally coordinated to four oxygen atoms of two cpip2- ligands in the equatorial plane. The axial plane is occupied by an amino nitrogen atom of one of the cpip2- ligands and an oxygen atom of a water molecule. The lattice water molecule in the metallocycle cavity involved OHO hydrogen bonding with the coordinated water molecules.
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