Chemistry of the metal carbonyls. IV. Reactions between certain metal carbonyls and some condensed polycyclic organic systems

Molybdenum and tungsten hexacarbonyls react with 8,9-dihydroindene to give red solids of composition C9H10 center dot M(CO)(a) [M = Mo, W]. Hydrogenation studies suggest that the molybdenurn compound is cyclononatetraene-molybdenum tricarbonyl. An iron compound, an unstable yellow oil C9H10 center dot Fe(CO)(a), has also been prepared from 8,9-dihydroindene, but in this complex the organic moiety appears not to have changed to its monocyclic form. Reactions between chromium carbonyl and anthracene, phenanthrene and pyrene have been investigated. Treatment of thianaphthene with chromium carbonyl or triron dodecacarbonyl, under the appropriate conditions, affords yellow C8H6S center dot Cr(CO)(8) and red-orange (CO)(2)center dot Fe center dot C8H6S center dot Fe(CO)(a), respectively. Similarly, acenaphthylene reacts with chromium hexacarbonyl to give purple-black C12H8 center dot Cr(CO)(8), and with triiron dodecacarbonyl to give (CO)(8)Fe center dot C12H8 center dot Fe(CO)(3). The probable structures of the new compounds are discussed.