Rhenium, Methyloxodiperoxy

Abstract

[171078-32-3] CH3O5Re (MW 281.24) InChI = 1S/CH3.2O2.O.Re/c;2*1-2;;/h1H3;;;;/q;2*-2;;+4 InChIKey = GTUCMCAQBYRBAX-UHFFFAOYSA-N (reagent used as oxidation catalyst for a wide variety of substrates under anhydrous conditions) Physical Data: solutions have a characteristic yellow color, other properties are not available as CH3ReO(O2)2 formed under anhydrous conditions has not been isolated. Solubility: soluble in water, alcohol, ethers, and most organic solvents. Form Supplied in: the reagent is not available commercially; however, this species is formed in the reaction mixture during oxidation employing methyltrioxorhenium (MTO) and the urea–hydrogen peroxide complex (UHP) both of which are readily available. Purity: not applicable for this reagent. Handling, Storage, and Precaution: UHP has a quite high H2O2 content (36.2%); however, it is relatively stable to impact.1 Anhydrous UHP is hygroscopic and is best stored at low temperatures, but samples stored at room temperature do not show a considerable decrease of oxygen content over periods of up to 1 year.1 A general rule for safe handling is to limit the concentration of H2O2 to 20 wt% in the reaction mixture. It is not recommended to use UHP and carboxylic anhydrides except when the oxidant is present in a large excess of chlorinated solvents such as dichloromethane.1 There are no data available about the toxicity and health risks of MTO. The use of gloves, coat, and safety glasses is recommended when doing reactions with MTO/H2O2.