Abstract
“Oxoalkyltriphenylphosphoniumsalts, Ph“ Oxoalkyltriphenylphosphonium salts, Ph 3P +CH 2COR X -, display keto-enol tautomerism. The keto—enol equilibrium was studied by 31P and 1H NMR and IR methods. The enol fraction in solution increases with a decrease in the size of the substituent R. The equilibrium is strongly influenced by hydrogen bonding between the anion X – and the enol hydroxyl.
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