The flash photolysis of di-μ-oxo-bis(oxo-molybdate(V)) acid aqueous solutions in the presence of excess chloride

✍ Scribed by L.S. Villata; M.C. Gonzalez; M.R. Feliz; A.L. Capparelli; S. Signorella

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 835 KB
• Volume: 69
• Category: Article
• ISSN: 1010-6030
• DOI: 10.1016/1010-6030(93)85093-n

✦ Synopsis

The flash photolysis of di-p-oxo his(oxo-molybdenum(V))

complexes in aqueous solutions of perchloric acid in the presence of excess chloride induced both photolabilization and photo-oxidation of Cl-and/or H,O ligands. Photolabilization produces the formation of reaction intermediates identified as p-oxo-bis (oxo-molybdenum(V)) '+ species: MqO,(p-O)(H,O):+ (A) and M&O+-O)(C1)(HZO), (B). A rapid equilibria between the transient species is established before they decay through a first order reaction. Intermediate A is the only species effective in promoting the observed decay leading to MO(W) and Hz as end products.

The relative absorption spectrum of species B is reported, as well as its stability constant in the temperature range 2545 "C. The effect of ligands on the overall mechanism is discussed.