Conformational equilibria and nitrogen inversion barriers are determined by 13C DNMR for three 1-chloropiperidines (1-chloro-2-methylpiperidine, 1-chloro-cis-2,6-dimethylpiperidine and 1-chloro-2-ethylpiperidine) and three 1-bromopiperidines (1-bromopiperidine,1-bromo-2-methylpiperidine and 1-bromo-cis-2,6-dimethylpiperidine). Experimental results are discussed and rationalised for all compounds studied and correlated with previous work.