Bimetallic complexes in zeolites: Reactivity of tetracarbonyl(trimethylstannyl)cobalt in acidic zeolite Y

Journal Article · Wed Dec 21 23:00:00 EST 1994 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100102a035· OSTI ID:6617835

Huber, C; Moller, K; Ogunwumi, S B; Bein, T ^[1]

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1. Purdue Univ., West Lafayette, IN (United States)

Stabilization techniques for low-valent organometallic species in acidic forms of large-pore zeolite Y are reported. The intrazeolite surface chemistry and thermal stability of Me[sub 3]SnCo(CO)[sub 4] in HY zeolites (H[sub 45]Na[sub 10]Al[sub 55]Si[sub 137]O[sub 384] and H[sub 16]Na[sub 39]Al[sub 55]Si[sub 137]O[sub 384]) were studied with X-ray absorption spectroscopy (Sn, Co edge EXAFS) and in-situ FTIR/TPD-MS techniques. The acidic zeolite Y host offers a chemically reactive surface that can interact with the Me[sub 3]Sn moiety of the bimetallic complex. FTIR and EXAFS data indicate attachment of the complex to the zeolite framework. The intrazeolite SnCo complex is accessible toward carbonyl substitution with PMe[sub 3]. One observes growing attachment of the precursor (progressive substitution of methyl ligands at tin) to the zeolite with increasing temperature, while the Sn-Co bond and the Co-carbonyl moiety remain stable up to about 90[degree]C. At higher temperatures the Sn-Co bond is cleaved, the carbonyl ligands are dissociated, and cobalt is oxidized in a reaction with the zeolite protons. 25 refs., 13 figs., 1 tab.

• OSTI ID: 6617835
• Journal Information: Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 98:51; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400201* -- Chemical & Physicochemical Properties
ABSORPTION SPECTROSCOPY
CATALYSTS
CHEMICAL BONDS
CHEMICAL REACTIONS
COBALT COMPLEXES
COMPLEXES
INFRARED SPECTRA
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
MINERALS
ORGANIC COMPOUNDS
ORGANOMETALLIC COMPOUNDS
SILICATE MINERALS
SPECTRA
SPECTROSCOPY
STABILITY
SURFACE PROPERTIES
TIN COMPLEXES
TRANSITION ELEMENT COMPLEXES
X-RAY SPECTROSCOPY
ZEOLITES