Hyperconjugation Involving Strained Carbon–Carbon Bonds. Structural Analysis of Ester and Ether Derivatives and One-Bond <sup>13</sup>C–<sup>13</sup>C Coupling Constants of α- and β-Nopinol
作者:Shinn Dee Yeoh、Colin E. Skene、Jonathan M. White
DOI:10.1021/jo3020243
日期:2013.1.18
σC–C–σ*C–O interactions involving the strained carbon–carbonbonds of α- and β-nopinol, and their ester and ether derivatives have been demonstrated in the solid state using the variable oxygen probe. These hyperconjugative interactions are manifested as a strong response of the C–OR bond distance to the electron demand of the OR substituent. Although the effects upon the donor C–C bond distances are