Vapor-phase Hydrosilylation Using a Transition Metal Complex Catalyst in a Liquid Polymer Medium Supported on Silica Gel

• Published in: Catalysis letters Vol. 123; no. 1-2; pp. 72 - 79
• Main Authors: Okamoto, Masaki, Kiya, Hironari, Matsumura, Akihiko, Suzuki, Eiichi
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.06.2008; Springer; Springer Nature B.V
• Subjects: Catalysis; Catalysts; Chemistry; Chemistry and Materials Science; Coordination compounds; Deactivation; Dogs; Exact sciences and technology; General and physical chemistry; Hydrosilylation; Industrial Chemistry/Chemical Engineering; Organometallic Chemistry; Phase transitions; Physical Chemistry; Platinum; Polyethylene glycol; Silica gel; Silicon dioxide; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Transition metal compounds; Supported liquid phase catalyst; Hydrosilylation; Platinum catalyst; Polyethylene glycol; Transition element complexes; Support; Metal complex; Polymer; Transition metal; Liquid phase; Platinum complex; Supported catalyst; Ethylene oxide polymer; Heterogeneous catalysis; Liquid; Vapor phase; Silica gel
• ISSN: 1011-372X; 1572-879X
• DOI: 10.1007/s10562-008-9395-7

Transition metal catalysts in various liquid polymer media supported on silica gel were prepared and used for vapor-phase hydrosilylation. Tetraammineplatinum(II) chloride and potassium hexachloroplatinate(IV) in a polyethylene glycol (PEG) medium showed high and stable activity. Deactivation of the catalyst was not observed unless a high platinum concentration in PEG was used. When the amount of PEG was 40 vol% of the pore volume of silica gel, PEG was coated on the pore walls of the silica gel, and did not block the pore openings. Active species in the PEG were formed only during the reaction.