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首页> 外文期刊>Acta crystallographica. Section C, Structural chemistry. >Structures and packing of ferrocenylmethyl methacrylate and ferrocene-1,1′-diylbis(methylene) dimethacrylate
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Structures and packing of ferrocenylmethyl methacrylate and ferrocene-1,1′-diylbis(methylene) dimethacrylate

机译:甲基丙烯酸二茂铁基甲基丙烯酸酯和二甲基丙烯酸二茂铁-1,1'-二基双(亚甲基)二甲基丙烯酸酯的结构和堆积

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摘要

Electroactive metallocene polymers are of interest due to the possibility that they offer a muscle-like response, and in gel systems very large volume changes are possible. The ferrocenyl moiety exhibits physical and electrochemical stability of the neutral and oxidized forms and could be a candidate for use as the redox-active group in these materials. The title compounds, [Fe(C5H5)(C10H11O2)], (I), and [Fe(C10H11O2)2], (II), comprise a typical ferrocene core with coplanar and approximately eclipsed cyclopentadienyl (Cp) rings. In (I), there is a single methyl methacrylate substituent, with the other Cp ring unsubstituted. In (II), a methyl methacrylate substituent on each Cp ring completes the structure. In both compounds, there is an s-trans geometry of the vinyl and carbonyl components of the methacrylate group. Inversion dimers formed through C—H...O contacts dominate the crystal packing of both molecules. Weak C—H...π(ring) contacts and, in the case of (I), an unusual C—H...π(alkene) contact further stabilize the structures.
机译:电活性茂金属聚合物由于具有提供类似肌肉的反应的可能性而备受关注,并且在凝胶体系中,非常大的体积变化是可能的。二茂铁基部分表现出中性和氧化形式的物理和电化学稳定性,并且可以用作在这些材料中用作氧化还原活性基团的候选者。标题化合物[Fe(C5H5)(C10H11O2)],(I)和[Fe(C10H11O2)2](II)包含典型的二茂铁核,其共平面和近似偏光的环戊二烯基(Cp)环。在(I)中,有一个甲基丙烯酸甲酯取代基,另一个Cp环未被取代。在(II)中,每个Cp环上的甲基丙烯酸甲酯取代基使结构完整。在这两种化合物中,甲基丙烯酸酯基团的乙烯基和羰基组分均具有s-trans几何形状。通过CH ... O接触形成的反相二聚体主导着两个分子的晶体堆积。弱的CH-π(环)接触,在(I)的情况下,不常见的CH-π(烯烃)接触进一步稳定了结构。

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