Abstract
IT is well established that the conjugation of the carbonyl group with the aromatic π-electron system in alkyl phenyl ketones (I, R′ = R″ = H) is not hindered by the substitution of one methyl group in the ortho-position (I, R′ = CH3, R″ = H). 
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WILSON, C., COHEN, D., MILLAR, I. et al. Tetracyanoethylene Complexes as Indicators of the Carbonyl Inductive (−I) Effect in Sterically Hindered Aromatic Ketones. Nature 204, 282–283 (1964). https://doi.org/10.1038/204282b0
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DOI: https://doi.org/10.1038/204282b0
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