ISSN:
1572-9001
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The structure of ammonium tetramethylammoniumbis(N-hydroxy-iminodiacetate)vanadate(IV) was determined by x-ray analysis. One independent anion and two cations were found in the asymetric unit. The crystal is monoclinic, space group C2/c, with a=15.820(9), b=16.450(6), c=16.311(4) å,Β=118.92(3) deg., V=3715(3) å3, Z=8, Dx=1.56g cm−3,Μ(Mo-Ka)=5.59 cm−1, F(OOO)=2028, M=434.9 for C12H24N4O10V. The structure was solved and refined to R(F)=0.029 and Rw(F)=0.040. The complex anion does not contain the oxovanadium(IV) group, but contains vanadium(IV) as the central atom. This is the first example of a vanadium(IV) complex octacoordinated to nitrogen and oxygen atoms exhibiting a highly distorted dodecahedral geometry. The chelation is along twoa and fourg edges. As the angles ones are bonding distances (N—O, 1.381(3), 1.382(4) å) the angles around the central atom are very different from those usually observed in the dodecahedral complexes. The V—O distances range from 1.973(3) to 2.071(3) å and the V—N distances range from 2.002(3) to 2.003(4) å.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00671809
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