Synthesis and Structure of the Potassium Salt with Monodeprotonated 1,2,3-Tri(ethoxycarbonylpropyl)-p-t-butylcalix[6]arene

Ze-Bao Zheng; Ren-Tao Wu; Ji-Kun Li; Yi-Feng Sun

doi:10.1071/CH07307

RESEARCH ARTICLE

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Synthesis and Structure of the Potassium Salt with Monodeprotonated 1,2,3-Tri(ethoxycarbonylpropyl)-p-t-butylcalix[6]arene

Ze-Bao Zheng ^A ^C , Ren-Tao Wu ^A , Ji-Kun Li ^B and Yi-Feng Sun ^A

+ Author Affiliations

- Author Affiliations

^A Department of Chemistry, Taishan University, Taian, Shandong, 271021, China.

^B Department of Materials and Chemical Engineering, Taishan University, Taian, Shandong, 271021, China.

^C Corresponding author. Email: zhengzebao@163.com

Australian Journal of Chemistry 61(7) 537-540 https://doi.org/10.1071/CH07307
Submitted: 28 August 2007 Accepted: 18 May 2008 Published: 16 July 2008

Abstract

Alkylation of p-t-butylcalix[6]arene with ethyl 4-bromobutanoate in the presence of K₂CO₃ results in a potassium salt of the monodeprotonated 1,2,3-tri(ethoxycarbonylpropyl)-p-t-butylcalix[6]arene in high yield. X-Ray crystallographic analysis shows that this compound exists as a double partial cone conformation. The potassium ion is positioned near the centre of the cavity of the macrocycle and binds to four phenolic oxygens. Close contacts between the potassium ion and phenyl rings observed in this compound are indicative of the presence of the cation–π interaction. The molecules are connected via intermolecular K⁺···O interactions into infinite chains.

Acknowledgements

The authors gratefully acknowledged the Postgraduate Foundation of Taishan University (grant no. Y05–2–02).

References

Synthesis and Structure of the Potassium Salt with Monodeprotonated 1,2,3-Tri(ethoxycarbonylpropyl)-p-t-butylcalix[6]arene

Abstract

Acknowledgements

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