Abstract
Masking of either acidic or basic sites of aluminum oxide, by co-feeding of NH
3 or CO
2, respectively, along with isophorone, indicate the involvement of weak/moderate basic sites to abstract a proton to form an enolate ion followed by involvement of weak/moderate acid sites for dienone–phenol rearrangement to yield aromatization products and involvement of strong acidic sites for yielding decomposition products.
In the armatization of isophorone, acidic and basic sites play a crucial role. Masking of either acidic or basic sites of aluminum oxide, by co-feeding of NH
3 or CO
2, respectively, along with isophorone, indicate the involvement of weak/moderate basic sites to abstract a proton to form an enolate ion followed by involvement of weak/moderate acid sites for dienone-phenol rearrangement to yield aromatization products and involvement of strong acidic sites for yielding decomposition products.
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