Related Experiment Video
Updated: Jan 9, 2026
The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
Published on: April 10, 2015
The complex stacking disorder of Fe- and Ru-based 1,1'-(3,6-pyrazabolyl)metallocenes
Berthold Stöger1, Alexandr Virovets2, Mischa Wenisch2
1X-Ray Centre, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria.
None:
1,1'-(3,6-Pyrazabolyl)ferrocene [Fc(BHpz)2] and the corresponding ruthenocene [Rc(BHpz)2] crystallize as order-disorder (OD) structures with layers of Pma(m) symmetry. Since the m[100] reflection and the a[010] glide reflection planes of adjacent layers do not overlap, given one layer, the adjacent layer can be placed in four distinct, but geometrically equivalent, positions. There are accordingly four polytypes of a maximum degree of order (MDO). One analyzed Fc(BHpz)2 crystal was composed of a mixture of the MDO1 polytype in four distinct orientations and the MDO3 polytype. A second crystal was essentially a single crystal of one out of two orientation of MDO3. In two analyzed crystals of Rc(BHpz)2, the MDO1 polytype (P1) was the major polytype and was observed in four or two orientation states, respectively. Pronounced diffuse scattering is attributed to a complex disorder, which cannot be explained by simple growth models. One Rc(BHpz)2 crystal features additional peaks in the diffraction pattern attributed to fragments of MDO3.
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