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Synthesis and X-ray structural characterization of tris(l-glycinato)vanadium(III) and trans-tetraquadichlorovanadium(III) chloride |
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| Authors: | Fiona H Fry Brenda Dougan Anthony C Willis Nicola E Brasch |
| Institution: | a School of Biosciences, University of Exeter, Geoffrey Pope Building, Stocker Road, Exeter EX4 4QD, UK b Department of Chemistry, Kent State University, Kent, OH 44242, USA c Research School of Chemistry, The Australian National University, Canberra, ACT 0200, Australia d Department of Chemistry, Knight Chemical Laboratory, University of Akron, Akron, OH 44325, USA |
| Abstract: | Despite the importance of VIII in biology, only three VIII complexes of naturally occurring amino acids have been structurally characterized. We report the structure of the first vanadium complex incorporating a glycine ligand, V(Gly)3] · 2DMSO, which crystallizes in a monoclinic system with space group Cc, a = 8.9186(5) Å, b = 21.5347(9) Å, c = 9.9064(5) Å and β = 110.536(3)°. The X-ray structural data show the central VIII metal octahedrally coordinated by three bidentate glycinato ligands arranged a mer configuration, with both Δ and Λ enantiomers present in the unit cell. The bulk sample was isolated as V(Gly)3] · DMSO · NaCl. Structural comparisons are made with the corresponding homoleptic glycinato complexes of CoIII, CrIII and NiII. The structure of trans-V(OH2)4Cl2]Cl · 2H2O has also been re-determined. This latter complex crystallizes in a monoclinic system in the P2(1)/c space group, a = 6.4381(9) Å, b = 6.3843(9) Å, c = 11.7980(17) Å and β = 98.057(2)°. The vanadium atom lies at a crystallographic inversion centre within the distorted octahedron formed by the four water and two chloride ligands. |
| Keywords: | Vanadium Glycine Crystallography Coordination chemistry |
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