The crystal and molecular structure of two triple-layered metaparacyclophanes.

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概要

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• Molecular structures of triple-layered metaparacyclophanes containing two and one para-bridged, outside benzene rings([2.2]paracyclo(4,6)[2.2]metaparacyclophane (PMP) and [2.2]metacyclo(4,6)[2.2]metaparacyclophane (MMP), respectively) have been determined by means of X-ray diffraction. PMP: monoclinic, space group P2<SUB>1</SUB>/a, <I>a</I>=15.989(1), <I>b</I>=9.932(1), <I>c</I>=5.991(1) Å, β=100.61(1)°, <I>Z</I>=2. MMP: monoclinic, space group P2<SUB>1</SUB>/c, <I>a</I>=8.969(2), <I>b</I>=22.774(4), <I>c</I>=10.339(2) Å, β=119.32(1)°, <I>Z</I>=4. The structure of PMP was solved by the vector search method and that of MMP by the direct method. They are refined anisotropically by the least-squares procedure, final <I>R</I> values are 0.066 for PMP and 0.096 for MMP. Of the two possible conformers PMP has a centrosymmetric staircase structure(anti-form) whereas MMP takes a platform shape(syn-form).

• 公益社団法人 日本化学会の論文

著者

• Misumi Soichi

  The Institute Of Scientific And Industrial Research Osaka University

• Kasai Nobutami

  Department Of Applied Biological Science Tokyo University Of Science

• Koizumi Yosuke

  The Institute of Scientific and Industrial Research, Osaka University

• Toyoda Toshihiro

  The Institute of Scientific and Industrial Research, Osaka University

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