Propynylferrocene and (phenylethynyl)ferrocene

Abstract

The title compounds, propynylferrocene, [Fe(C5H5)(C8H7)], (I), and (phenylethynyl) ferrocene, [Fe(C5H5)(C13H9)], (II), are stabilized by weak C-H center dot center dot center dot pi interactions. The C C bond distances in these molecules are in the range 1.182 (3)-1.192 (3) angstrom. In (II), the ferrocenyl and phenyl groups are perpendicular, making an angle of 89.06 (13)degrees, which is a rare occurrence.