An indenofluorene (IF) is any of five hydrocarbons with formula C 20H 12, whose carbon skeleton is a sequence of five fused rings with 6, 5, 6, 5, and...

11H-indeno[2,1-a]phenanthrene, benzo[b]phenanthro[2,1-d]thiophene, indenofluorenes, chrysene, and their methyl- and dimethyl-substituted homologues; the...