| abstract |
A compound of the formula:and compounds of the formulas:wherein R1 is independently in each occurrence C1-20 hydrocarbyl or C1-20 hydrocarbyl containing one or more S, N, O, P or Si atoms, C4-16 hydrocarbyl carbonyloxy, C4-16 aryl(trialkylsiloxy) or both R1 may form with the 9-carbon on the fluorene ring a C5-20 ring structure or a C4-20 ring structure containing one or more heteroatoms of S, N or O;R2 is independently in each occurrence C1-20 hydrocarbyl, C120 hydrocarbyloxy, C1-20 thioether, C1-20 hydrocarbylcarbonyloxy or cyano;R3 is independently in each occurrence C1-20 hydrocarbyl or C1-20 hydrocarbyl substituted with di(C1-20 alkyl)amino, C1-20 hydrocarbyloxy or C1-20 hydrocarbyl or tri(C1-10 alkyl)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)2, -B(OR4)2 or wherein R4 is independently in each occurrence a C1-10 alkyl group and,R5 is independantly in each occurrence a C2-10 alkylene group. |