Abstract
This review highlights the binding and structural aspects of halide complexes with synthetic macrocyclic receptors with different functional groups including charged amine (protonated or quaternary form), amide, thioamide and pyrrole. Different binding modes in solution and solid states in terms of monotopic, ditopic, cascade and sandwich complexes of halides are discussed. The sizes and functional groups of the macrocycles, as well as solvents have been shown to play a critical role in binding and selectivity for anionic guests. In general, macrobicyclic or tricyclic hosts tend to form monotopic complexes with anions of comparable sizes, while an expanded cavity is needed for the higher degree of complexation (e.g., ditopic or cascade). On the other hand, the formation of a sandwich complex is favored by monocyclic ligands with hydrogen donor groups.
Keywords: Macrocyclic Receptors, Inclusion Complexes, Halide Anions, thioamide, pyrrole, monotopic complexes, sandwich complex, hydrogen donor groups
Current Organic Chemistry
Title: Inclusion Complexes of Halide Anions with Macrocyclic Receptors
Volume: 12 Issue: 14
Author(s): Md. Alamgir Hossain
Affiliation:
Keywords: Macrocyclic Receptors, Inclusion Complexes, Halide Anions, thioamide, pyrrole, monotopic complexes, sandwich complex, hydrogen donor groups
Abstract: This review highlights the binding and structural aspects of halide complexes with synthetic macrocyclic receptors with different functional groups including charged amine (protonated or quaternary form), amide, thioamide and pyrrole. Different binding modes in solution and solid states in terms of monotopic, ditopic, cascade and sandwich complexes of halides are discussed. The sizes and functional groups of the macrocycles, as well as solvents have been shown to play a critical role in binding and selectivity for anionic guests. In general, macrobicyclic or tricyclic hosts tend to form monotopic complexes with anions of comparable sizes, while an expanded cavity is needed for the higher degree of complexation (e.g., ditopic or cascade). On the other hand, the formation of a sandwich complex is favored by monocyclic ligands with hydrogen donor groups.
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Cite this article as:
Hossain Alamgir Md., Inclusion Complexes of Halide Anions with Macrocyclic Receptors, Current Organic Chemistry 2008; 12 (14) . https://dx.doi.org/10.2174/138527208785740265
DOI https://dx.doi.org/10.2174/138527208785740265 |
Print ISSN 1385-2728 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-5348 |
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