On the most probable differences occurring in the Lipson–Hesse difference method for indexing powder photographs
Lehel Zsoldos · Acta Crystallographica · 1963
THE STRUCTURE OF DIACETYLRUTHENOCENEfive-membered rings indicate a rotation of only a few degrees (which is however apparent on the a-axis electron-density projection) from the cis configuration.Accurate molecular dimensions are not available from this two-dimensional study, and since the object was the determination of the molecular configuration, no three-dimensional analysis was carried out.The acetocyclopentadienyl residues are approximately planar and parallel, and the mean molecular dimensions are 1~u-C=2.18~ (omitting one very short distance from the averaging), Car-Car = 1.41 A, other C-C = 1.48 ~., C=0 = 1"23 /~, AC--C--C (in five membered rings) = 108 °.The author is indebted to Dr M. D. Rausch for suggesting the problem and for the crystal sample,