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- W1994657629 abstract "A large number of compounds of the type XC6H4–CHCYZ have been prepared and the effect of varying X, Y, and Z on the 13C n.m.r. chemical shifts of the β-(terminal) carbon of the ethenyl group has been investigated. For Y and Z constant and X meta or para to the side-chain the dominant influence is the electronic effect of X. For meta-X, excellent correlations of the Cβ shifts with Hammett σmeta constants are obtained in all cases. For para-X, there is evidence that both the inductive and resonance effect of X influence the shift with the extent of the contribution of the latter being greatest in situations where resonance interaction between X and Y/Z is expected to be strongest. Attempts to investigate the degree of this interaction by means of Taft's Dual Substituent Parameter Equation were only partly successful, and showed that in our systems such analysis is better regarded as a qualitative guide to the extent of resonance interaction that a quantitative measure of it." @default.
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- W1994657629 date "1988-01-01" @default.
- W1994657629 modified "2023-10-11" @default.
- W1994657629 title "Side-chain<sup>13</sup>C nuclear magnetic resonance shifts in ring-substituted styrenes. The effect of β-substituents on β-carbon shifts" @default.
- W1994657629 doi "https://doi.org/10.1039/p29880000019" @default.
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