Platinum-Mediated Reversible Cross-linking/Decross-linking of Polyacetylenes Substituted with Phosphine Ligands: Catalytic Activity for Hydrosilylation
Yuto Inoue, Takahiro Ishida, Natsuhiro Sano, Tatsuo Yajima, Hiromitsu Sogawa, Fumio Sanda
Abstract
Polymeric metal complexes have attracted interest as polymer catalysts. In the present study, borane-2-(diphenylphosphino)-N-(4-ethynylphenyl)benzamide (1o) and borane-4-(diphenylphosphino)-N-(4-ethynylphenyl)benzamide (1p) were synthesized and polymerized using (nbd)Rh(PPh3)[C(Ph) = CPh2] as a catalyst. The BH3 groups were removed from the formed polymers to obtain polyacetylenes with −PPh2 ligands at the side chains, from which polymeric metal complexes were constructed by intermolecular and intramolecular coordination of platinum (Pt). The Pt-coordinating cross-linked network polymers were decross-linked by the addition of PPh3. The Pt-coordinating polymers catalyzed hydrosilylation of 1-dodecene with diethoxymethylsilane.