Molybdenum and tungsten compounds

US3980730A · kind A · utility

Assignee

• Institut Francais du Petrole des Carburants et Lubricants et Enterprise de Recherches et d'Activities Petroliers Elf · FR

Inventors

• Francois Dawans · Bougival, FR
• Emmanuel Goldenberg · Poissy, FR

Key dates

• Filing date: Jan 9, 1975
• Grant date: Sep 14, 1976
• Expiry date: Jan 9, 1995

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F36/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Organic compounds of the formula: EQU [(H.sub.3.sub.-n X.sub.n)C - CO.sub.2 M (CO).sub.m (R).sub.p (L).sub.q ].sub.r in which X is a halogen atom, at least one X being fluorine, M is molybdenum or tungsten, R is a hydride ion or a hydrocarbon group, L is a Lewis base and m, n, p, q and r are integers, are manufactured from fluoracetic esters and molybdenum or tungsten carbonyl compounds. They are useful as catalysts for polymerizing or co-polymerizing unsaturated compounds such as butadiene.