“…4.2 despite the fact that both functional groups are reactive. This reaction presents a robust model system to be studied by infrared spectroscopy [458,459] and it also occurs on porous silicon [460]. Similarly high selectivities have also been reported in the UV-stimulated reactions of alkene groups of undecylenic acid methyl ester, undec-10-enoic acid 2-bromo-ethyl ester, and undecanoic acid 2-bromo-ethyl ester [461], electrochemical reactions of olefin carboxyl and sulfonic acids [462], and thermal attachment of vinylferrocene and ferrocenecarboxaldehyde [463].…”