Synthesis and X-ray crystal structure of two novel ester ferrocenophanes

Two novel ester ferrocenophanes have been prepared by esterification of 1,1′-ferrocenedi(carbonyl chloride) with glycol and 1,4-butanediol, respectively. Both of them have been characterized by IR, elemental analysis, MALDI-TOF MS and 1H NMR spectroscopic methods, and their structures have been elucidated by X-ray diffraction. The intermolecular associations based on C - H⋯O hydrogen bonds have also been discussed. These molecules are assembled into chains, and the chains are further assembled into a 3D structure through several hydrogen bonds. © 2007 Verlag der Zeitschrift für Naturforschung.