Reactions of Fe2(CO)9 with various biscycloalka-1,4-diselena-2,5-cyclohexadienes lead to a variety of products: (diselenato)diiron hexacarbonyls, ferracyclohexadienones, ferracyclopentadienes, cycloalkeno-benzenes, and unique diiron diselenametallapropellanes. These latter complexes are intermediates in the fragmentation of the starting heterocycles to the other observed products. The nature of the exact product distribution from the reactions depends upon the ring size of the starting heterocycle. An X-ray crystallographic analysis of a metallapropellane is reported. Reactions of 1,4-diselenafulvenes are also reported, leading to a related asymmetric cleavage to form (diselenato)diiron hexacarbonyl complexes but with no isolable or observable products from the remaining organic fragment. With a styryl-substituted diselenafulvene, an unusual triiron nonacarbonyl complex is isolated.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry