有機硫黄化合物の研究(第6報)cis-およびtrans-1-Thioniabicyclo[4.4.0]-decane Bromide結晶中における熱異性化の平衡と, これら2種の陽イオン異性体を含む異常結晶構造の生成

スポンサーリンク

概要

• 論文の詳細を見る

• The phase transition, thermal isomerization and formation of a novel crystal structure out of cis-1-thioniabicyclo [4. 4. 0] decane bromide (cis-TBD-Br) and its trans isomer (trans-TBD-Br) were investigated by means of differential thermal analysis, X-ray diffraction and infrared absorption spectrometry. The cis-TBD-Br having a monoclinic C-lattice at room temperature is transformed into an orthorhombic F-lattice at 126℃. With continuous heating up to 180℃, the cis-TBD cations in this lattice are gradually isomerized into the cis and trans equilibrium state. This equilibrated compound forms a novel α-TBD-Br crystal, in which the ratio of the cis-and trans-TBD cations are approximately 3 : 2. The trans-TBD-Br having an orthorhombic C-lattice at room temperature is transformed into an orthorhombic F-lattice at 108℃, and then also isomerized into the α-TBD-Br. At room temperature, the α-TBD-Br can be kept for several days in a desiccator over silica gel. After that it gradually decomposes into its component crystals, cis-and trans-TBD-Br. As the α-TBD-Br lattice contains four formular units, C_9H_<11>SBr, the space group is restricted to one of Fmmm, Fmm2 and F222. It is concluded that, since the isomeric cis-and trans-TBD cations are distributed statistically around four equivalent positions having a site symmetry (mmm, mm2 or 222) given by the space group, these cations should have statistical orientations.

• 公益社団法人日本薬学会の論文
• 1981-10-25

著者

• 三由 文久

  金沢医科大学

関連論文

• 有機硫黄化合物の研究(第4報)1-Methylthiolanium Iodideの相転移
• 有機硫黄化合物の研究(第3報)cis-およびtrans-1-Thioniabicyclo-[4.4.0]decane Bromideの反応
• 有機硫黄化合物の研究(第7報)cis-およびtrans-1-Thioniabicyclo-[4.4.0]decane Iodide結晶の熱異性化反応
• 有機硫黄化合物の研究(第6報)cis-およびtrans-1-Thioniabicyclo[4.4.0]-decane Bromide結晶中における熱異性化の平衡と, これら2種の陽イオン異性体を含む異常結晶構造の生成

スポンサーリンク