Extended Data Fig. 2: Geometric features of the ‘{Cf(Cp^tet)₂Cl₂}¹⁻’ anions and polymeric chain propagation.

a, View from the top of the metallocene fragment for Cf(1) showing the trans disposition of the Cp^tet C–H groups and the Cl–Cf–Cl bond angle. b, View from the top of the metallocene fragment for Cf(2) showing the cis disposition of the Cp^tet C–H groups and the Cl–Cf–Cl bond angle. c, d, View down the crystallographic c axis, showing that the Cf(1) and Cf(2) chains propagate parallel to the a axis—note that the arrangement of the panels is not indicative of their relative spatial arrangement.