Acta Cryst. (2007). E63, m1297-m1299  [ doi:10.1107/S1600536807016169 ]

A monoclinic polymorph of 1-(chloridomercurio)ferrocene

A. S. Romanov, A. A. Yakovenko, M. Yu. Antipin, J. Lindline and T. V. Timofeeva

Abstract: A monoclinic modification of chloridomercurioferrocene, [FeHgCl(C₅H₄)(C₅H₅)], was found on its crystallization from acetonitrile. A triclinic form of the title compound [Sunkel & Kiessling (2001). J. Organomet. Chem. 637, 796-799] was crystallized from chloroform. Both forms have two molecules per asymmetric unit. In the monoclinic form, both molecules have an eclipsed conformation, while in the triclinic form one of them has an eclipsed and the other a staggered conformation. In the monoclinic crystals, molecules form infinite ribbons due to intermolecular secondary coordination between Hg and Cl atoms, while in the triclinic form molecules are arranged in tetramers.

Online 18 April 2007

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