Bis(η-cyclopentadienyl)molybdenum chemistry: synthesis and reactions of ring-functionalised compounds

Abstract

Co-condensation of molybdenum atoms with spiro[2.4]hepta-4,6-diene gives the compound [[graphic omitted]H₂)₂]. Treatment of [[graphic omitted]H₂)₂] with iodine gives the tetraiodo-derivative [Mo(η-C₅H₄CH₂CH₂I)₂I₂](2). The tetrabromo- and tetrachloro-analogues of (2) are similarly prepared. The iodo-groups of (2) can be exchanged with the SPh radical to give [Mo(η-C₅H₄CH₂CH₂SPh)₂(SPh)₂] which reacts with hydrogen chloride to form the compound [Mo(η-C₅H₄CH₂CH₂SPh)₂Cl₂](4). Abstraction of a halide ion from (4) gives [[graphic omitted]Ph)(η-C₅H₄CH₂CH₂SPh)Cl]PF₆. Complex (2) reacts with dimethylamine to give [[graphic omitted]Me₂)(η-C₅H₄CH₂CH₂NMe₂H)H][PF₆]₂.