Electron paramagnetic resonance studies of some supported organometallic catalysts

Russell Francis Howe

Research output: Contribution to journal › Article

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Abstract

E.p.r. spectroscopy has been used to study catalysts obtained by supporting the following complexes on high surface area silica: Mo2(CH3CO2)4, M2[CH2Si(CH3)3]6(M = Mo or W), W(CO)6, W(CH3)6, Cr(CO)6, Cr[CH2C(CH3)3]4. The supported molybdenum complexes activated at sufficiently high temperatures give rise to e.p.r. signals identical to those observed previously from silica supported Mo(CO)6 and MoO3 catalysts, due to MoV in square pyramidal co-ordination, and O formed by interaction of O2 with tetrahedrally coordinated MoV. The supported tungsten complexes give only an O signal on exposure to O2. The spectrum of adsorbed CH3 radicals is detected during decomposition of supported W(CH3)6. The supported chromium complexes activated in vacuo and exposed to O2 give CrV signals identical to those observed from silica supported CrO3. The catalytic implications of these observations are discussed.
Original languageEnglish
Pages (from-to)1689-1696
Number of pages8
JournalJournal of the Chemical Society, Faraday Transactions
Volume71
Issue number1
DOIs
Publication statusPublished - 1 Jan 1975

Cite this

Electron paramagnetic resonance studies of some supported organometallic catalysts. / Howe, Russell Francis.

In: Journal of the Chemical Society, Faraday Transactions, Vol. 71, No. 1, 01.01.1975, p. 1689-1696.

Research output: Contribution to journal › Article

Howe, RF 1975, 'Electron paramagnetic resonance studies of some supported organometallic catalysts' Journal of the Chemical Society, Faraday Transactions, vol. 71, no. 1, pp. 1689-1696. https://doi.org/10.1039/F19757101689
Howe RF. Electron paramagnetic resonance studies of some supported organometallic catalysts. Journal of the Chemical Society, Faraday Transactions. 1975 Jan 1;71(1):1689-1696. https://doi.org/10.1039/F19757101689
Howe, Russell Francis. / Electron paramagnetic resonance studies of some supported organometallic catalysts. In: Journal of the Chemical Society, Faraday Transactions. 1975 ; Vol. 71, No. 1. pp. 1689-1696.
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