Photochemische Umsetzungen von η5-Indenyl-tricarbonyl-methyl-molybdän und -wolfram, C9H7M(CO)3CH3 (M = Mo, W), mit Acetylenen / Photochemical Reactions of Indenyl-tricarbonyl-methyl-molybdenum and -tungsten, C9H7M(CO)3CH3 (M = Mo, W), with Acetylenes

Abstract

The photoreaction of the indenyl complexes C9H7M(CO)3CH3 (M = Mo, W) with alkynes (L) in solution leads to 1:1 adducts, which are found to be metallocyclic alkenylketone compounds C9H7M(CO)2(L-COCH3). UV irradiation of C9H7W(CO)3CH3 in the presence of either acetylene or methylacetylene also gives substituted derivatives C9H7W(CO)(L)CH3 in low yields. For these compounds, the intramolecular mobility of the π-bonded alkyne ligand can be demonstrated by temperature-dependent 1H NMR spectroscopy.