Evidence for the involvement of chromium(II) as an intermediate in the reduction of chromium(VI) to chromium(III) by formaldehyde
Abstract
The reaction between chromium(VI) and formaldehyde in aqueous perchloric acid is inhibited by manganese(II) ion, according to the relation k1=a/(1 +b[Mn2+])+c; manganese(II) ion and formaldehyde compete to reduce the intermediate CrIV, and CrII is an intermediate.