title: Self-supported organometallic rhodium quinonoid nanocatalysts for stereoselective polymerization of phenylacetylene.
abstract: Heterogeneous self-supported organometallic nanocatalysts (ONs) were synthesized by treatment of the eta6-pi-hydroquinone rhodium complex [(1,4-hydroquinone)Rh(COD)]+ with Al(Oi-Pr)3. The organometallic nanocatalysts, the size of which can be controlled by alteration of the reaction conditions, show high catalytic activities in the stereoselective polymerization of phenylacetylene to produce cis-poly(phenylacetylene). A key feature of the ON catalyst synthesis is a facile eta6 to eta4 hapticity change occurring in the quinonoid ring, which is triggered by deprotonation of the -OH groups by Al(Oi-Pr)3, with concomitant coordination of the quinone oxygen atoms to the aluminum.
authors.affiliation: Department of Chemistry, Sungkyunkwan University, Suwon 440-746, Korea.
authors.forename: Kang Hyun
authors.initials: KH
authors.lastname: Park
authors.forename: Kwonho
authors.initials: K
authors.lastname: Jang
authors.forename: Seung Uk
authors.initials: SU
authors.lastname: Son
authors.forename: Dwight A
authors.initials: DA
authors.lastname: Sweigart
mesh_terms: D000114:Acetylene / Q000031:analogs & derivatives* / Q000737:chemistry; D002384:Catalysis; D015394:Molecular Structure; D049329:Nanostructures / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D010316:Particle Size; D011108:Polymers / Q000138:chemical synthesis*; D011809:Quinones / Q000737:chemistry*; D012238:Rhodium / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: D009942:Organometallic Compounds; D011108:Polymers; D011809:Quinones; C044736:phenylacetylene; D012238:Rhodium; D000114:Acetylene