Abstract Carbon-13 NMR spectra of mono-and dichloro-hexanes and mono-and dichloro- heptanes are reported. Substituent effects for α, β and γ positions are presented. Differences between the 13 C chemical shifts of diastereoisomers are observed in the cases of 2, 4-and 2, 5-dicholohexanes and 2, 4-, 2, 5-and 3, 5-dichloroheptanes.