A stable chromium(V) compound. Synthesis, properties, and crystal structure of potassium bis(2-hydroxy-2-methylbutyrato)oxochromate(V) monohydrate

Two mononuclear tetraphenylphosphonium oxochromium complexes: (PPh4)[CrVO3(H2O)] and (PPh4)[CrVIO3(OH)]

“…The distortion of the tetrahedra is reflected by the bond angles at the metal centres. The C~ distances, which range from 1.54(2) to 1.59 (3)/~, in (1) and from 1.54(2) to 1.58 (2)/~ in (2), are similar to those found in analogous structures (Noh, Heintz, Haggerty, Rheingold & Theopold, 1992;Nishino & Kochi, 1990;Krumpolc, Deboer & Rocek, 1978). The observed CrV--O(aqua) distance of 2.07 (3)/k in (1) is slightly longer than the CrVi---O(hydroxy) distance of 2.02 (3)ti, in (2).…”

Apoptosis of Lymphocytes in the Presence of Cr(V) Complexes: Role in Cr(VI)-Induced Toxicity

“…Sodium bis(2-ethyl-2-hydroxybutyrato)oxochromate(V), Na[Cr V O(ehba) 2 ], 1 and sodium bis(2-hydroxy-2-methylbutyrato)oxochromate(V), Na[Cr V O(hmba) 2 ], 2 were prepared and characterized according to the methods reported earlier (25,32).…”

Effect of Added Pyridine Bases on the Electron Transfer Reaction of Chromium(VI) with Organic Sulfides. Spectral Evidence for the Formation of a Chromium(V) Intermediate

“…Alternatively the conversion of Cr(VI) to Cr(III) may take place either via Cr(V) (initial one electron transfer) or Cr(IV) (initial two electron transfer) or through both intermediate species. Compared to Cr(VI) and Cr(III) the other two oxidation states of chromium, Cr(V) and Cr(IV), are less stable but can be stabilized by adding appropriate ligand systems [26][27][28][29][30].…”