13C Chemical Shifts and Conformational Equilibria in Quaternary Piperidinium Salts

Article abstract of DOI:10.1002/mrc.1270200110

Carbon-13 nuclear resonance spectra of a series of N-methyl-N-alkylpiperidinium salts have been measured, and the observed chemical shifts analysed in terms of the stereochemical and conformational properties of the molecules.Furthermore, the differences of the free energy (ΔG^o) between two conformers on ring inversion have been estimated.