38814-48-1Relevant articles and documents
PHOTOCHEMISCHE REAKTIONEN VON UEBERGANGSMETALL-OLEFIN-KOMPLEXEN. IX. ADDITIONS-SUBSTITUTIONS-REAKTION VON 2,3-DIMETHYL-1,3-BUTADIEN AN TRICARBONYL(η6-8,8-DIMETHYL-HEPTAFULVEN)CHROM(0)
Michels, Eduard,Kreiter, Cornelius G.
, p. C1 - C4 (1983)
Under UV irradiation tricarbonyl(η6-8,8-dimethylheptafulvene)chromium(0) (I) reacts with 2,3-dimethyl-1,3-butadiene (II) in an unusual addition-substitution manner.A dicarbonylchromium(0) complex with a η3:5-butenylenecycloheptadienyl chelating ligand (III) is formed in good yield.Treatment of III with CO at 273 K and atmospheric pressure yields the corresponding substituted tricarbonyl(η6-bicycloundeca-2,4,8-triene)chromium(0) complex (IV), which is the formal -cycloadduct of I and II.The structures of III and IV are elucidated by IR, 1H NMR and 13C NMR spectroscopy.