Deuterium and18O isotope effects on13C chemical shifts of sterically hindered and/or intramolecularly hydrogen-bondedo-hydroxy acyl aromatics
作者:Poul Erik Hansen、Solveig N. Ibsen、Tina Kristensen、Simon Bolvig
DOI:10.1002/mrc.1260320705
日期:1994.7
Likewise are the istope effects on CO, C1, C3 and C4 carbon resonances and some show unusual signs. These unusual effects are explained by a higher degree of twist in the deuterio than the protio compound. Stericisotopeeffects are also observed on OH chemicalshifts of sterically hindered o‐hydroxy acetyl aromatic compounds deuteriated at the methyl group. These isotopeeffects show non‐additivity. For