The Crystal Structures of Methyl Bromide and Methyl Iodide

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概要

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• The crystal structures of methyl bromide and methyl iodide have been determined by the X-ray diffraction method at about −120°C and about −80°C respectively. Both the crystals are isomorphous, with orthorhombic space group <I>D</I><SUB>2<I>h</I></SUB><SUP>16</SUP>–<I>Pnma</I>. Unit cells containing four molecules have the dimensions: <I>a</I>=4.47<SUB>4</SUB>(1), <I>b</I>=6.42<SUB>0</SUB>(2), and <I>c</I>=9.15<SUB>0</SUB>(1) Å for methyl bromide, and: <I>a</I>=4.59<SUB>7</SUB>(2), <I>b</I>=6.98<SUB>7</SUB>(1), and <I>c</I>=10.11<SUB>7</SUB>(1) Å for methyl iodide. These structures are quite different from that of methyl chloride, which has a symmetry of <I>C</I><SUB>2<I>v</I></SUB><SUP>12</SUP>–<I>Cmc</I>2<SUB>1</SUB>. In the three crystals, all the molecules are found on the mirror planes; the difference lies in the mutual orientations of the molecules.

• 公益社団法人 日本化学会の論文

著者

• Tomiie Yujiro

  Faculty Of Science Osaka University

• Hayafuji Yoshinori

  Faculty of Science, Kwansei Gakuin University

• Kawaguchi Takemi

  Faculty of Science, Kwansei Gakuin University

• Hijikigawa Masaya

  Faculty of Science, Kwansei Gakuin University

• Ikeda Masashi

  Faculty of Science, Kwansei Gakuin University

• Fukushima Reizo

  Faculty of Science, Kwansei Gakuin University

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• The Crystal Structures of Methyl Bromide and Methyl Iodide
• The Crystal and Molecular Structure of O,O′,N-Trimethylpyoluteorin, C14H13O3NCl2
• The Crystal and Molecular Structure of Demycarosyl Leucomycin A3 Hydrobromide

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