Structural Studies of a Liquid Crystalline Compound, 2-(4-Cyanophenyl)-5-(4-butylphenyl)-1,3,2-dioxaborinane, by Means of Nuclear Magnetic Resonance and X-Ray Analyses.

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概要

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• The crystal and molecular structure of the title nematogen (<B>1</B>), has been determined by an X-ray analysis. Compound <B>1</B> belongs to the triclinic system with space group <I>P</I>-1, <I>a</I>=9.798(2), <I>b</I>=11.579(2), <I>c</I>=9.716(2) Å, α=74.081(13), β=117.766(14), γ=108.179(13)°, and with two molecules in the unit cell. The geometry around the boron atom is planar, and the plane defined by O2BC is parallel to the phenyl ring bonded to the boron atom. The angle between two phenyl rings is 74.3°. The molecules are in their most extended conformation, with nearest neighbors oriented antiparallel to each other. The <SUP>1</SUP>H NMR studies have indicated that the half-chair conformation of the dioxaborinane is kept in a solution even at 125°C where <B>1</B> forms a nematic phase, and the rigidity is essential for the formation of mesophases.

• 公益社団法人 日本化学会の論文

著者

• Seto Koji

  Research Center For Coastal Lagoon Environments Shimane University

• Takai Yoshio

  The Institute Of Scientific And Industrial Research Osaka University

• SAWADA Masami

  The Institute of Scientific and Industrial Research, Osaka University

• TANAKA Takanori

  The Institute of Scientific and Industrial Research, Osaka University

• Takahashi Shigetoshi

  The Institute Of Scientific And Industrial Research Osaka University

• Imazaki Hideyuki

  Research & Development Division, Nitto Kasei Co., Ltd.

• Matsubara Hiroshi

  The Institute of Scientific and Industrial Research, Osaka University

• Seto Koji

  Research & Development Division, Nitto Kasei Co., Ltd.

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