Crystal and molecular structure of α,α,γ-trimethyl-γ-ferrocenyl-1,2-tri-methyleneferrocene

Abstract

An X-ray crystallographic study has shown that in the title compound the second ferrocenyl group is exo- and is aligned as indicated in Figure 1 (a). It is confirmed that deformation of the molecular structure is necessary to accommodate the two endo-methyl groups. The unit cell of the crystals is orthorhombic with a= 14·719 ± 0·007, b= 24·630 ± 0·112, c= 11·354 ± 0·005 Å, space group Pbca, Z= 8. The structure was solved by direct methods from diffractometer data, and refined to R 0·117 for the 4075 observed structure factors. Mean Fe–C is 2·045 Å.