Lower rim substituted tert-butylcalix[4]arenes (II). Complexing ability of 5,11,17,23-tetra-tert-butyl-25,26,27,28-tetrakis-O-(piperidinylcarbonyl)me thylenecalix[4]arene. The crystal structures of the ligand and its sodium complex

摘要

The sodium(I) chloride and yttrium(III), lanthanum(III), samarium(III) and gadolinium(III) nitrate complexes of 5,11,17,23-tetra-tert-butyl-25,26,27,28-tetrakis(piperidinylcarbonyl)methy lene)calix[4]arene were prepared in direct reaction of the ligand and appriopriate metal salts and characterized by spectral data (IR, UV-Vis, H-1 NMR, FAB MS), and elemental analysis. The transmetallation reactions of the sodium complex by the lanthanide ions was also achieved. The crystal structures of the ligand and its sodium complex were determinated by single X-ray analysis. (C) 2002 Published by Elsevier Science Ltd. [References: 15]