Vanadate complexes

Smith, C. A., Rayment, 1. X-ray structure of the magnesium (11). ADP-vanadate complex of the Dictyostelium discoideum myosin motor domain to 1.9 A resolution. Biochemistry 35 5404-5407, 1996. 

The levels of vanadium pentoxide and vanadate complexes present as fireside deposits. The higher the level, the greater the catalytic effect. There is also some catalytic effect simply due to the presence of hot steel tubes. 

The automated spectrophotometric procedure [47] for the determination of total nitrogen in soils discussed in section 12.5.1.2 has also been applied to the determination of 0-0.75% phosphorus in soils. The method is based on the formation of the yellow molybdate-vanadate complex which has an absorption maximum at 420nm. 

Most of the normally encountered applications of proton and carbon NMR spectroscopy have been applied in studies of vanadate complexes, complexation reactions, equilibria, and kinetics. Carbon-13 studies of the influence of complexation... 

Chemical Shifts (ppm) Observed and Calculated for Monoanionic Vanadate Complexes of Aliphatic Alcohols (ROH)a... 

Bond Distances and Angles for the [VO]2 Core of Various Dimeric Vanadate Complexes of Diols and a-Hydroxycarboxylic Acids... 

Zhang, B., S. Zhang, and K. Wang. 1996. Synthesis, characterization and crystal structure of cyclic vanadate complexes with monosaccharide derivatives having a free adjacent diol system. J. Chem. Soc., Dalton Tram. 3257-3263. 

Jaswal, J.S. and A.S. Tracey. 1991. Stereochemical requirements for the formation of vanadate complexes with peptides. Can. J. Chem. 69 1600-1607. 

FIGURE 9.5 The formation constants (V04H2 + H2L V02L ) for various diethanolamine vanadate complexes are shown as a function of the pKj of the ligand. The solid line is provided as a guide and has no theoretical significance. The values are for 0.40 M KC1 solutions at room temperature and are taken from the work of Crans and Boukhobza [21]. 

Ray, W.J., Jr., D.C. Crans, J. Zheng, J.W. Burgner, II, H. Deng, and M. Mahroof-Tahir. 1995. Structure of the dimeric ethylene glycol-vanadate complex and other 1,2-diol-vanadate complexes in aqueous solution Vanadate-based transition-state analog complexes of phosphotransferases. J. Am. Chem. Soc. 117 6015-6026. 

Wladkowski, B.D., L.A. Svensson, L. Sjolin, J.E. Ladner, and G.L. Gilliland. 1998. Structure (1.3 A) and charge state of a ribonuclease A-uridine vanadate complex Implications for the phosphate ester hydrolysis mechanism. J. Am. Chem. Soc. 120 5488-5498. 

Phosphate and vanadate complexes of zinc show a diversity of coordination behavior. Zn + accelerates polyphosphate hydrolysis (Section 9.3) appropriate zinc-organic phosphate complexes provide models for ATP transport and biological phosphate transfer, and are of possible relevance to DNA and RNA polymerases (see Zinc DNA-binding Proteins). 

---