TY - JOUR
T1 - Synthesis and X-ray structural characterization of tris(l-glycinato)vanadium(III) and trans-tetraquadichlorovanadium(III) chloride
AU - Fry, Fiona H.
AU - Dougan, Brenda
AU - McCann, Nichola
AU - Willis, Anthony C.
AU - Ziegler, Christopher J.
AU - Brasch, Nicola E.
PY - 2008/6/2
Y1 - 2008/6/2
N2 - 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.
AB - 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.
KW - Coordination chemistry
KW - Crystallography
KW - Glycine
KW - Vanadium
UR - http://www.scopus.com/inward/record.url?scp=43949127721&partnerID=8YFLogxK
U2 - 10.1016/j.ica.2007.11.025
DO - 10.1016/j.ica.2007.11.025
M3 - Article
SN - 0020-1693
VL - 361
SP - 2321
EP - 2326
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
IS - 8
ER -