نتایج جستجو برای: stereoelectronic effect
تعداد نتایج: 1641819 فیلتر نتایج به سال:
tant correlations between interproton coupling constants and structure available at the time. It cited 148 references, many of them multiple, and contained 109 structures with hundreds of numerical values for coupling constants as well as graphical and tabular results defining the variation of 1H~’Hcoupling constants with stereoelectronic factors. [The SCI® indicates that this paper has been ci...
tant correlations between interproton coupling constants and structure available at the time. It cited 148 references, many of them multiple, and contained 109 structures with hundreds of numerical values for coupling constants as well as graphical and tabular results defining the variation of 1H~’Hcoupling constants with stereoelectronic factors. [The SCI® indicates that this paper has been ci...
SYNTHESIS OF OLIGOSACCHARIDE MIMETICS BY THE DESULFURATIVEREARRANGEMENT OF ALLYLIC DISULFIDES AND STEREOELECTRONICINFLUENCE OF C-O BONDS ON CAND O-GLYCOSYLATIONbyMYRIAME MOUME-PYMBOCKMay 2013Advisor:Dr David CrichMajor:ChemistryDegree:Doctor of PhilosophyThis dissertation focuses on two different problems. The first part of thismanuscript ...
Abstract In polymer mechanochemistry, mechanosensitive molecules (mechanophores) are activated upon elongation of anchored arms. The reactivity a mechanophore can be influenced by variety structural factors, including the geometry attachment arms and nature eventual substituents. Here we investigate stereoelectronic effects in force-accelerated Diels–Alder reactions using CoGEF (Constrained Geo...
This research has demonstrated the utility of a rigorously calibrated, molecular mechanics/semiempirical quantum mechanical protocol for developing stereoelectronic (Tolman) maps for phosphine ligands. A computational analysis of alkyl and aryl phosphines in common usage suggests that these ligands are quite similar stereoelectronically. A noticeable gap in the Tolman map for common phosphines ...
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