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Arenes can also be selectively oxidized to aryl aldehydes and ketones in the presence of IBX . Anionic ( organolithium ) homo - , block , and random copolymerization of hydrocarbon , polar vinyl , and cyclic siloxane monomers ; synthesis of poly ( aryl ether ) sulfones , ketones , and related polymers via nucleophilic aromatic substitution , sulfonate and carboxylate ion-containing polymers ; microphase and macrophase separations in block copolymers and physical blends ; network structures ; epoxy , elastomers , polyurethanes , biomaterials , and surface structures of organosiloxane and other block copolymers . We also encourage you to check for ketones if you are in the 240 to 250 range or higher . stereoselectively from te corresponding ketones by treatment with IBX ; the stereoselectivity varies with ring size . That 's very unique to humans , where it shifts from burning glucose to burning ketones , that 's what allows fasting to take place .