Abstract
AbstractProtons situated next to the “ene”‐side of enolized β‐diketone systems are less deshielded than when they are situated next to the “one” side in the isomeric enol system. As published before (1) the ethers and esters of the same system show the opposite behaviour. This allows discussion regarding the structure of several cyclopentane β‐tricarbonyl derivatives, in which the different enol forms can be differentiated by I.R. and P.M.R. spectroscopy.
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