Recent Developments in Transition Metal-Catalyzed Polymerization I. Synthesis and Structure of Rh-Based Stereoregular Poly(N-propargylamide)s-Stabilization of Helical Structure by Means of Hydrogen Bond.

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  • NOMURA Ryoji
    Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University
  • TABEI Junichi
    Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University
  • YAMADA Katsuhiro
    Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University
  • MASUDA Toshio
    Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University

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Other Title
  • 遷移金属触媒重合の新展開　Ｉ　　ロジウム触媒による立体規則性ポリ（Ｎ‐プロパルギルアミド）の合成と構造　水素結合によるらせん構造の安定化
  • ロジウム ショクバイ ニ ヨル リッタイ キソクセイ ポリ N プロパルギルアミド ノ ゴウセイ ト コウゾウ スイソ ケツゴウ ニ ヨル ラセン コウゾウ ノ アンテイカ
  • Stabilization of Helical Structure by Means of Hydrogen Bond
  • 水素結合によるらせん構造の安定化

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Abstract

N-Propargylamides have proven to polymerize in the presence of Rh catalysts to give stereoregular (cis-transoidal) polymers in good yields. Intramolecular hydrogen bonds are constructed between the pendant amide groups, which induces and stabilizes the helical conformation of the main chain. The helical structure is readily deformed into the randomly coiled state, which is promoted by the external stimuli such as heating or adding polar solvents. The transition from the disordered to helical conformations was spectroscopically evidenced to involve negatively large entropy and enthalpy changes.

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 59 (4), 190-198, 2002

    The Society of Polymer Science, Japan

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