Synthesis and complexing properties of a double-calix[4]arene crown ether
✍ Scribed by Zouhair Asfari; Rym Abidi; Françoise Arnaud; Jacques Vicens
- Publisher
- Springer Netherlands
- Year
- 1992
- Tongue
- English
- Weight
- 350 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0923-0750
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The synthesis of methylated calix[4](aza)crowns and their complexing properties towards Co 2+ , Ni 2+ and Cu 2+ are described. The crystal structure of one of those ligands, hydrogen bonded to a picric acid molecule via a water molecule, is given.
## Abstract Four __p‐tert__‐butylcalix[4]arene derivatives with different Schiff base groups at the lower rim were efficiently prepared in three steps. __p‐tert__‐Butylcalix[4]arene was firstly __O‐__peralkylated with __ω__‐haloalkylphthalimide in the system of NaH/DMF to give calixarene tetraalkyl