Fishbone-like, imine-based liquid crystalline polysilsesquioxanes (FP) including homopolymeric H-FP and copolymeric (C-FP) have been first synthesized by hydrosilylation reaction of a vinyl-terminated imine mesogen compound with highly ordered ladderlike polyhydrosilsesquioxane [H-T] and random copolymethylhydrosilsesquioxane [MH-T] in the presence of Cp(2)PtCl(2) used as the catalyst. This novel thermotropic side-chain liquid ctystalline polymer with Mw of 10(5-6) can form a transparent uniform film on melting. Their clearing temperature Tcl and mesophase range Delta H are much higher than those of the corresponding comb-like, imine-based liquid crystalline polysiloxane (single main chain) by about 200 degrees C.