Volume 39, Issue 20 pp. 3658-3660
Communication

Alkane Carbonylation with Carbon Monoxide on Sulfated Zirconia: NMR Observation of Ketone and Carboxylic Acid Formation from Isobutane and CO

Alexander G. Stepanov Dr.

Alexander G. Stepanov Dr.

Group of NMR Spectroscopy for Catalytic Hydrocarbon Conversion and Laboratory for Zeolites and Acid-Base Catalysis Boreskov Institute of Catalysis Siberian Branch of the Russian Academy of Sciences Prospekt Akademika Lavrentieva 5, Novosibirsk 630090 (Russia) Fax: (+7) 3832-34-3056

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Mikhail V. Luzgin Dr.

Mikhail V. Luzgin Dr.

Group of NMR Spectroscopy for Catalytic Hydrocarbon Conversion and Laboratory for Zeolites and Acid-Base Catalysis Boreskov Institute of Catalysis Siberian Branch of the Russian Academy of Sciences Prospekt Akademika Lavrentieva 5, Novosibirsk 630090 (Russia) Fax: (+7) 3832-34-3056

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Alexey V. Krasnoslobodtsev

Alexey V. Krasnoslobodtsev

Natural Science Department, Novosibirsk State University ul. Pirogova 2, Novosibirsk 630090 (Russia)

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Vera P. Shmachkova Dr.

Vera P. Shmachkova Dr.

Group of NMR Spectroscopy for Catalytic Hydrocarbon Conversion and Laboratory for Zeolites and Acid-Base Catalysis Boreskov Institute of Catalysis Siberian Branch of the Russian Academy of Sciences Prospekt Akademika Lavrentieva 5, Novosibirsk 630090 (Russia) Fax: (+7) 3832-34-3056

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Nina S. Kotsarenko Dr.

Nina S. Kotsarenko Dr.

Group of NMR Spectroscopy for Catalytic Hydrocarbon Conversion and Laboratory for Zeolites and Acid-Base Catalysis Boreskov Institute of Catalysis Siberian Branch of the Russian Academy of Sciences Prospekt Akademika Lavrentieva 5, Novosibirsk 630090 (Russia) Fax: (+7) 3832-34-3056

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This work was supported by grant No. 99-03-32454 from the Russian Foundation for Basic Research (RFBR) and in part by a joint RFBR-INTAS grant (No. 95-0194). The authors sincerely thank Dr. V. N. Sidelnikov for GC-MS analysis.

Abstract

Coadsorbed water determines the reaction products when isobutane undergoes carbonylation by CO on a sulfated zirconia catalyst at 70°C. This is shown by the results of in situ solid-state 13C NMR and ex situ 13C high-resolution NMR spectroscopy and by GC-MS analyses. Methyl isopropyl ketone selectively forms in the absence of water, while pivalic acid represents the primary reaction product the presence of coadsorbed water (see scheme).

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