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X‐ray and Solution Structures of the First Zn Funnel Complex Based on a Calix[6]aza‐cryptand
Author(s) -
Darbost Ulrich,
Zeng Xianshun,
Rager MarieNoëlle,
Giorgi Michel,
Jabin Ivan,
Reinaud Olivia
Publication year - 2004
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200400619
Subject(s) - chemistry , cryptand , calixarene , ligand (biochemistry) , perchlorate , molecule , metal , supramolecular chemistry , crystallography , zinc , coordination complex , homoleptic , metal ions in aqueous solution , inorganic chemistry , ion , stereochemistry , crystal structure , organic chemistry , biochemistry , receptor
First insights into the coordinative behavior of a calix[6]tren ligand are presented. Reaction with zinc perchlorate led to a dicationic complex with the metal ion strongly bound to the tren cap. It presents a unique coordination site accessible for a small coordinating molecule that is controlled by the calixarene cavity. Hence, X‐ray analysis and solution 1 H NMR studies evidenced a five‐coordinate complex thanks to the coordination of a guest ligand, MeCN, included deep inside the calixarene cavity. Interestingly, the metal ion is bound in an asymmetrical environment in both the solid state and in solution. It is also particularly reluctant, and resistant, to anion binding. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)