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Anion Binding of a Protonated Tripodal Tris(ferrocenylurea) Receptor
Author(s) -
Li Minrui,
Wu Biao,
Cui Fengjuan,
Hao Yongjing,
Huang Xiaojuan,
Yang XiaoJuan
Publication year - 2011
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201100214
Subject(s) - chemistry , protonation , tripodal ligand , tris , hydrogen bond , amine gas treating , triflic acid , ion , sulfuric acid , crystallography , crystal structure , stereochemistry , medicinal chemistry , molecule , inorganic chemistry , organic chemistry , biochemistry , catalysis
Two anion complexes of a tripodal tris(ferrocenylurea) receptor (L), (LH) · CF 3 SO 3 ( 1 ) and (LH) · HSO 4 ( 2 ), were obtained from L and triflic acid or sulfuric acid, respectively. Crystal structural analyses show that the receptor in the two 1:1 (host/guest) complexes is protonated (on the bridgehead tertiary amine), and the CF 3 SO 3 – or HSO 4 – anion is located outside the tripodal cavity and anchored by the urea and CH groups of the receptor by hydrogen bonds. 1 H NMR spectroscopic studies confirmed the binding mode in solution.