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1. N-tert-Butyl Sulfinyl Squaramide Receptors for Anion Recognition through Assisted tert-Butyl C–H Hydrogen Bonding

Author

Li, Yao, Yang, Guo-Hui, Shen, Ye-Ye, Xue, Xiao-Song, Li, Xin, and Cheng, Jin-Pei

Abstract

A series of novel N-tert-butyl sulfinyl squaramide receptors have been designed and synthesized. Their interactions with a range of inorganic anions were studied in solution by 1H NMR spectroscopy. This new type of squaramide displayed better anion-binding abilities over conventional diphenyl squaramides. The single crystal analysis and DFT calulations implied the role of the tert-butyl C–H protons in binding Cl–. The energies of C–H···Cl–interactions were estimated to be 1.4–1.6 kcal/mol in solution.

Published
2024
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