Fluorene-containing polymers and compounds useful in the preparation thereof

This invention relates to novel 2,7-dihalofluorenes which are substituted at the 9-position and methods for the preparation of such 9-substituted-2,7-dihalofluorenes. This invention further relates to oligomers and polymers of such fluorene compounds. This invention also relates to films and coatings prepared from such fluorenes, oligomers and polymers, processes for preparing such films and coatings, and light-emitting diodes comprised of one or more layers of polymer films at least one of which is derived from the oligomers and polymers of the invention. A compound of the formula: and compounds of the formulas: wherein Ris independently in each occurrence Chydrocarbyl or Chydrocarbyl containing one or more S, N, O, P or Si atoms, Chydrocarbyl carbonyloxy, Caryl(trialkylsiloxy) or both Rmay form with the 9-carbon on the fluorene ring a Cring structure or a Cring structure containing one or more heteroatoms of S, N or O;Ris independently in each occurrence Chydrocarbyl, Chydrocarbyloxy, Cthioether, Chydrocarbylcarbonyloxy or cyano;Ris independently in each occurrence Chydrocarbyl or Chydrocarbyl substituted with di(Calkyl)amino, Chydrocarbyloxy or Chydrocarbyl or tri(Calkyl)siloxy;a is independently in each occurrence 0 or 1;X is independently in each occurrence a halogen moiety; andZ is independently in each occurrence -B(OH), -B(OR)or wherein Ris independently in each occurrence a Calkyl group and,Ris independantly in each occurrence a Calkylene group.