Intermolecular interactions in N-(ferrocenylmethyl)anthracene- 9-carboxamide

The title compound, [Fe(C5H5)(C21H16NO)], was synthesized from the coupling reaction of anthracene-9-carboxylic acid and ferrocenylmethylamine. The ferrocenyl (Fc) group and the anthracene ring system both lie approximately orthogonal to the amide moiety. An amide±amide interaction (along the a axis) is the principal interaction [N O = 2.910 (2) AÊ]. A CÐ H (arene) interaction [C centroid = 3.573 (2) AÊ] and a CÐH O interaction [C O = 3.275 (3) AÊ] complete the hydrogen bonding; two short (Fc)C C(anthracene) contacts are also present. Comment Applications of novel redox-active ligands in diverse research ®elds, such as medicinal chemistry and materials science, have recently engaged scientists. Ferrocene continues to attract much interest as an electroactive group, with potential appli-cations ranging from sensors to new optical materials to liqui