Conformation of non‐aromatic ring compounds. Part 67. 220 Mc/s NMR spectra of some six‐membered hetero‐rings having a ‐CH₂‐CH₂‐CH₂‐ fragment

From the 220 Mc/s NMR spectra of 2‐ p ‐chlorophenyl‐1,3‐dioxane (I), 2‐phenyl‐1,3‐oxathiane (II) and ‐dithiane (III), trimethylene sulfite (IV) and 2‐oxo‐2‐phenoxy‐1,3,2‐dioxaphosphorinane (V) the spin‐spin splitting pattern of the ‐CH 2 ‐CH 2 ‐CH 2 ‐ fragment of the ring is analyzed. The various types of coupling constants (geminal, vicinal and long‐range) are discussed.