High‐resolution NMR spectra of the polysulfones of six monolefins

Abstract 100‐MHz NMR spectra are reported for solutions of the 1:1 copolymers of sulfur dioxide with hex‐1‐ene, cis‐ and trans‐but‐2‐enes, cyclohexene, cyclopentene, and norbornene, including the deuterated polymers made from hex‐1‐ene‐2‐d1, cis‐ and trans‐but‐2‐ene‐2,3‐d2, and cyclohexene‐3,3,6,6‐d4. The resolution of the spectrum of poly‐(hex‐1‐ene sulfone) was very poor in CCl4 as solvent but good in polar solvents. The main‐chain CH2 protons are nonequivalent, and their chemical shifts show sensitivity to dyad structure; the α‐CH2 protons are also non‐equivalent. The spectra of most of the other polymers are discussed in terms of possible preferential modes of addition as well as tacticity effects.