Copoly(dimethglanthraquinonylene/3,3,5,5-tetramethyl-4-oxa-3,5-disila-1,7-heptanylenes) have been prepared by direct Ru-catalyzed reaction of 1,4-, 1,5-, and 1,8-dimethylanthraquinones with 1,3-divinyltetramethyldisiloxane. Alternatively, these dimethylanthraquinones can undergo a Ru-cataIyzed reaction with vinylpentamethyldisiloxane to yield the corresponding bis(2＇-trimethylsiloxydimethylsiloxy)ethyldimethylanthraquinones. Their acid-catalyzed siloxane equilibration polymerization yields copolymers whose molecular weights are two to three times higher than similar copolymers obtained by direct Ru-catalyzed reaction. These higher molecular weight copolymers have higher T-g＇s and thermal stabilities. The monomers show two reduction potentials, whereas the copolymers show a single broad reversible reduction potential at approximately the average of the two reduction potentials of the corresponding monomers.