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Crystal structure of (2-acetyl-ferrocen-1-yl)boronic acid
Andrea Preuss1, Marcus Korb1, Heinrich Lang1
1Technische Universität Chemnitz, Faculty of Natural Sciences, Institute of Chemistry, Inorganic Chemistry, D-09107 Chemnitz, Germany.
Abstract:
(2-Acetyl-ferrocen-1-yl)boronic acid, [Fe(C5H5)(C7H8BO3)] or 2-C(O)CH3-1-B(OH)2-Fc [Fc = Fe(η5-C5H3)(η5-C5H5)], crystallizes in the centrosymmetric space group P21/n. The boronic acid functionality inter-acts via intra-molecular hydrogen bonds with the acetyl group and with the -B(OH)2 functionality of an adjacent mol-ecule. The resulting centrosymmetric dimer exhibits an anti-positioning of the ferrocenyl moieties towards the central B2O4 plane. Consequently, an (R ,S )-, i.e. a meso configuration is present for this dimer. In the crystal, weak C-H⋯O hydrogen bonds consolidate the mol-ecular packing.
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