Chemistry Letters, Vol.31, No.2, 156-157, 2002
Anionic ring-opening polymerization of cyclic thiocarbonates containing norbornene and norbornane groups undergoing volume expansion on polymerization
Six-membered cyclic thiocarbonate derivatives, 5,5-(bicyclo[2.2.1]hept-2-en-5,5-ylidene)-1,3-dioxane-2-thione (1) and 5,5 -(bicyclo [2.2.1]heptan-5,5-ylidene)-1,3-dioxane-2-thione (2) underwent anionic ring-opening polymerization initiated by 1,8diazabicyclo[5.4.0]-7-undecene (DBU) to afford polythiocarbonates accompanying 12.3 and 12.6% volume expansion, respectively.