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Chemisorption of cycloalkenes on metal surfaces is followed by dehydrogenation processes that often give chemisorbed C/sub n/H/sub n/ species e.g., cyclohexene ..-->.. benzene and cyclooctadiene ..-->.. cyclooctatetraene. Because these transformations are facile, this report explores the reactions of organosilanes with single-crystal metal surfaces as routes to compounds in which there are Si-C bonds of mutliple bond order. With platinum and nickel, we observed either no dehydrogenation or gross degradation of the silaalkane. Palladium, however, has furnished dehydrogenation syntheses of silaethylenes, silabenzene, and what appears to be silacyclobutadiene.

Silane surface chemistry of palladium: synthesis of silaethylene, silacyclobutadiene and silabenzene