(IUCr) Crystallography Journals Online

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Acta Cryst. (2009). E65, m298-m299 [ doi:10.1107/S1600536809005522 ]

Ferrocenylbutadiyne

V. N. Nemykin, J. D. Dorweiler and R. I. Subbotin

Abstract: The title compound, [Fe(C₅H₅)(C₉H₅)], crystallizes in a form of a [pi] - [pi] -stacked assembly formed as a result of strong intermolecular [pi] - [pi] interactions between (a) the triple bonds of two neighboring butadiyne substituents overlapping in a `head-to-tail' fashion [characterized by CC short contacts of 3.622 (5), 3.567 (6) and 3.556 (6) Å] and (b) the triple bonds of the butadiyne substituent and substituted cyclopendadiene ring of neighboring molecules [CC = 3.474 (5) and 3.492 (6) Å]. The linear butadiyne substituent has alternating C-C triple and single bonds, while the unsubstituted cyclopentadiene ring is slightly positionally disordered (although the structure reported here was solved as non-disordered) and retains a close to eclipsed conformation.

Online 21 February 2009