1988 Fiscal Year Final Research Report Summary
The extension of molecular catalytic functions of heteropoly compounds
| Project/Area Number |
62470075
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
工業物理化学
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| Research Institution | Nagoya University |
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Principal Investigator |
IZUMI Yusuke Nagoya University, 工学部, 教授 (00115528)
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| Co-Investigator(Kenkyū-buntansha) |
URABE Kazuo Nagoya University, 工学部, 助手 (60092540)
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| Project Period (FY) |
1987 – 1988
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| Keywords | Molecular catalysis / Heteropoly compounds / Friedel-Crafts reactions / Hydroformylation |
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| Research Abstract |
The present research has been attempted to extend novel molecular catalytic functions of heteropoly compounds which involve the acid-base catalysis by heteropoly acid and the modifying effects of heteropoly anion on the transition metal catalysis.
Compared with the comventional protonic acids, the heteropoly acid supported on silica exhibited much higher catalytic activities with neither decomposition nor dissolution for the liquid-phase Friedel-Crahts alkylation and acylation of aromatic hydrocarbon compounds using alkene, alkyl halide, acyl halide and carboxylic acid anhydride. This Lewis acid-like behavior of heteropoly acid suggests a novel molecular catalysis owing to the unique propertiy of Keggintype heteropoly anion.
The liquid-phase hydroformylation of 1-alkene catalyzed by Rh cationic complex was remarkably promoted when the Rh complex was coupled with heteropolymolybdate anion. The methoxycarbonylation of 1-alkene to afford the corresponding carboxylic acid ester was effectively catalyzed by a PdCl_2(ppn_3)_2 -heteropoly acid catalyst system. The selectivity to the linear ester was enhanced by use of heteropolymolybdic acid. These modifying effects by heteropoly compounds suggest another novel molecular catalytic function of the Keggin-type heteropoly anion which may strongly interacts with transition metals to modify their electronic and steric catalysis.
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