Influence of polyether chain on the non-covalent interactions and stability of the conformers of calix[4]crown ethers

  • Satish Kumar
  • Jaspreet Kaur
  • Anjai Verma
  • Mukesh
  • Arun Kumar
  • Sojkumar Dominic
Original Article


Conformational preferences of the calix[4]crown-(4,5,6,7)-ethers were studied utilizing HF/6-31G(d), B3LYP/6-31G(d), B3LYP/6-311G(d), MPWB95/6-31G(d), MPWIPW91/6-31G(d) and M062X/6-31G(d) methods. DFT-D3 (Becke–Johnson) dispersion correction method was also employed. The results acquired from the analysis of the computational data indicated that the stability of conformers of calix[4]crown-(4,5,6,7)-ethers follows the order; cone conformer > partial cone conformer > 1,3-alternate conformer. It was initially assessed, in general, that both hydrogen bond and OH⋯π interactions play a crucial role in determining the stability of the different conformers. It was further observed that the strength of both H-bond and OH⋯π interactions, are dependent on the length of the polyether bridge. Hence, in order to comprehend them better, the effect of these interactions was studied systematically on the conformational stability of different isomers. It is found that both intramolecular hydrogen bonds and O–H⋯π interactions are mainly responsible for relative stabilities of these conformers, which in turn is also dependent on the length of the polyether bridges.

Graphical Abstract

The computational study reported here demonstrate that the size of the polyether bridge along with non-covalent interactions such as hydrogen bond and OH⋯π interactions play an important role in determining the stability of the conformers of calix[4]crown ethers.


Calix[4]crown ether Calixarenes Computational methods Calix[4]crown ether conformers Crown ether 



The authors sincerely thank DRDO (ERIP/ER/DG-NSM/990116702/M01/1645) and DST-SERB (EMR/2016/005022) for financial support. Authors are thankful to the Principal, St. Stephen’s College for providing the facilities. The authors are also thankful to Mr. K. M. Mathew for the support.

Supplementary material

10847_2018_801_MOESM1_ESM.docx (2.2 mb)
Supplementary material 1 (DOCX 2287 KB)


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Copyright information

© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  • Satish Kumar
    • 1
  • Jaspreet Kaur
    • 1
  • Anjai Verma
    • 2
  • Mukesh
    • 3
  • Arun Kumar
    • 1
  • Sojkumar Dominic
    • 1
  1. 1.Department of Chemistry, St. Stephen’s CollegeUniversity EnclaveDelhiIndia
  2. 2.Department of ChemistryAtma Ram Sanatan Dharma College (University of Delhi)DelhiIndia
  3. 3.Department of ChemistryKeshav Mahavidyalaya (University of Delhi)DelhiIndia

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