Molecular structures of dicyclopentadienylmagnesium and dicyclopentadienylchromium by gas-phase electron diffraction

Abstract
The molecular structures of (C5H5)2Mg and (C5H5)2Cr have been determined by gas-phase electron diffraction; the C–H bonds in (C5H5)2Cr are bent 2·9(1·1)° out of the plane of the C5 ring towards the metal atom.