Abstract
Publisher Summary This chapter discusses theoretical and empirical studies that emphasize the need to consider several factors in addition to linear charge polarization to interpret either proton or carbon-13 chemical shifts in terms of charge distribution. Prime among these are (1) the effect of neighboring group anisotropy on proton shifts, (2) the E2 term in proton shifts at high positive or negative charge densities, (3) the paramagnetic term in proton shifts in systems with lone pair electrons, (4) a possible reversal of slope for the carbon-1 3 shift-charge density correlation at high positive charge density, (5) the importance of bond order terms in determining carbon-13 shifts, and (6) the importance of average excitation energies (ΔE) in determining carbon-13 shifts, particularly in systems with lone pairs. The related phenomenon of ion association is reported in the cases of carbanions.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
