Characterization of transition states by isotopic mapping and structure-reactivity coefficients: solvent and secondary deuterium isotope effects for the base-catalyzed breakdown of acetaldehyde hemiacetals
作者:Charolotte A. Coleman、Christopher J. Murray
DOI:10.1021/ja00005a035
日期:1991.2
Rate constants and structure-reactivity coefficients for the breakdown of acetaldehyde and acetaldehyde-d 4 hemiacetals were determined in water and deuteriumoxide by trapping the acetaldehyde formed with α-effect nucleophiles. General-base catalysis by sibstituted acetate and cacodylate ion catalysts represents equilibrium ionization of the hemiacetal CL 3 CL(OL)OR (L=H or D) to form the hemiacetal