Media type: E-Article Title: Copolymerization of carbon monoxide with exo‐methylenecycloalkane and dienes: synthesis of functionalized aliphatic polyketones Contributor: Kettunen, Mika; Abu‐Surrah, Adnan S; Repo, Timo; Leskelä, Markku imprint: Wiley, 2001 Published in: Polymer International Language: English DOI: 10.1002/pi.769 ISSN: 0959-8103; 1097-0126 Keywords: Polymers and Plastics ; Materials Chemistry ; Organic Chemistry Origination: Footnote: Description: <jats:title>Abstract</jats:title><jats:p>Synthesis of functional aliphatic polyketones was achieved by co‐ and terpolymerization of the strained <jats:italic>exo</jats:italic>‐methylenecycloalkane, methylenecyclopropane (MCP), and also the dienes 1,5‐hexadiene, 1,7‐octadiene and 1,6‐heptadien‐4‐ol, with carbon monoxide and propene, using the dicationic palladium(II) phosphine complex [Pd(dppp) (NCCH<jats:sub>3</jats:sub>)<jats:sub>2</jats:sub>](BF<jats:sub>4</jats:sub>)<jats:sub>2</jats:sub> (I) (dppp is 1,3‐bis(diphenyl‐phosphino)propane) as the catalyst precursor. The resulting MCP/CO copolymer contains both ring‐opened and cyclic microstructures. Ring‐opening copolymerization yields <jats:italic>exo</jats:italic>‐methylene functionalized polyketone. In contrast to hexadiene/carbon monoxide copolymer (Hx/CO), no ring structures were observed in the alternating octadiene/carbon monoxide (Oc/CO) and heptadien‐4‐ol/carbon monoxide (Hp‐ol/CO) copolymers. The remaining double bonds were left intact to yield polymers with olefinic functionalities in the side chains.</jats:p><jats:p>© 2001 Society of Chemical Industry</jats:p>