INFRARED SPECTRA OF CHEMISORBED MOLECULES .2. BENZENE ON SILICA-SUPPORTED METALS

被引:30
作者
ERKELENS, J
EGGINKDU.SH
机构
[1] Unilever Research Laboratory, Vlaardingen
关键词
D O I
10.1016/0021-9517(69)90008-6
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Infrared spectra of benzene adsorbed on silica-supported nickel, copper, palladium, platinum and iron were studied. A broad band in the 2760-3060 cm-1 region was obtained for nickel and copper. From this it may be concluded that benzene is chemisorbed with loss of its aromatic character and not by formation of a π-complex as with organometallic complexes. Nor is it probable that, for geometric reasons, benzene is chemisorbed on the surface by a linking of six carbon to six metal atoms. The bonding of the molecule to the surface seems therefore more complex. No infrared absorption bands due to initially adsorbed species were observed for hydrogen-covered palladium and iron. This may indicate the presence of chemisorbed species of which a large number of the CH-bonds have been dissociated. On platinum, cyclohexane was formed during adsorption. © 1969.
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页码:62 / &
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