[1.1.1]Propellane and maleic anhydride: Face‐specific copolymerization with formation of an alternating 1:1 copolymer

Abstract
The spontaneous and face‐specific copolymerization of [l.l.l]propellane and maleic anhydride to give the strictly alternating 1:1 copolymer 2 is described. The molecular weight of 2 after transformation into the corresponding diester 5c was determined to be 80.000 (Mn) and 220.000 (Mw), respectively.