Formation of pseudo[3]rotaxanes containing calix-bis-crowns and secondary ammonium ions and their thermodynamic stabilities in a solution: preorganization by second macrocycle and nonallosteric behavior exhibited by large crown cavities

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Abstract

This paper describes the formation of pseudo[3]rotaxanes containing calix[4]-bis-crowns, exhibiting a 1,3-alternate conformation and large crown cavities, and secondary ammonium ions. The first and second association constants of pseudo[3]rotaxane formation are moderate (K1 = 175, K2 = 100 M-1) and are higher than that of the corresponding pseudo[2]rotaxane (K = 24 M-1), consisting of a calix[4]-mono-crown and the same secondary ammonium ion.

Journal

  • Tetrahedron Letters

    Tetrahedron Letters 54(60), 6829-6833, 2013-12

    Elsevier

Codes

  • NII Article ID (NAID)
    120005422967
  • Text Lang
    ENG
  • Article Type
    journal article
  • Data Source
    IR 
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