A process has been developed for exchanging one Cu atom per ion exchange site in an MFI zeolite. The material is synthesized by reaction of the acidic zeolite with CuCl vapor, followed by oxidation with oxygen, and conversion of the Cu 2+ species to copper hydroxyl ions and copper hydroxyl dimers by reaction of the oxidized material with water upon exposure to humid air. This material, a similarly prepared BEA material, and copper-containing MFI and BEA zeolites prepared by conventional aqueous ion-exchange have been comparatively investigated for the conversion of 1-propanamine. Reaction products include C 6 products such as dipropanamine and 1-propanamine, N-(1-propylidene). A bifunctional acid/metal reaction pathway is proposed to account for the observed products.