Hydrogen bonding interaction between imidazolyl N-H group and peroxide : Stabilization of Mn(III)-peroxo complex TpiPr2Mn(η2-O2)(imMeH) (imMeH = 2-methylimidazole)

Abstract A mononuclear side-on peroxo managanese (III) complex, Tp iPr2 Mn(η 2 -O 2 )(im Me H) ( 3 ) was prepared by the reaction of [Tp iPr2 Mn(O)] 2 with excess amount of H 2 O 2 in the presence of 2-methylimidazole (im Me H). Its X-ray structure clearly demonstrated the involvement of intermolecular hydrogen bonding interaction between η 2 -peroxide and imidazolyl N–H functional group. Complex 3 was stable, green in color and unable to oxygenate triphenylphosphine and ethyl vinyl ether.