Chloroacetonyltriphenylphosphonium et phosphoranne correspondant. Etude physicochimique et conformation

Keto-Enol Tautomers in a Carbonyl Phosphonium Salt

“…The NMR evidence appears to confirm that this form is a possibility even in the protonated precursor to the ylide. Related work with the phosphonium salt generated by reacting triphenylphosphine with dichloroacetone appears to have given a similar result for [Ph 3 PCH 2 COCH 2 Cl]Cl (3). The spectroscopic information presented here will allow students to discuss these resonance structures with a little more authority.…”