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Hydrogen Bond and π–π Interactions in a 3D Supramolecular Structure Containing 1D Helical Chains
Author(s) -
Bai Fenghua,
Xu Jinjin,
Su Haiquan,
Gu Xiaojun
Publication year - 2012
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.201200071
Subject(s) - supramolecular chemistry , chemistry , hydrogen bond , decarboxylation , crystallography , molecule , ligand (biochemistry) , intermolecular force , stereochemistry , crystal structure , catalysis , organic chemistry , biochemistry , receptor
The reaction of 2, 2′‐bipyridine‐6, 6′‐dicarboxylic acid (H 2 bpdc) with zinc nitrate and different rare earth chlorides generates two novel three‐dimensional supramolecules Zn(6‐bpc) 2 · 2H 2 O ( 1 ) and Ce(bpdc) 2 · H 2 O ( 2 ) (6‐Hbpc = 2, 2′‐bipyridine‐6‐carboxylic acid). The left‐and right‐handed helical chains give rise to a 3D supramolecular framework through hydrogen‐bond and weak π–π interactions in complex 1 . Interestingly, the decarboxylation occurred and the bpdc ligand was transformed into 6‐bpc species under the hydrothermal reaction in the presence of Nd III ions, while the decarboxylation did not occur when Ce III ions were used. In the structure of 2 , one central Ce(IV) atom coordinates to two bpdc ligands, resulting in a discrete molecule. These discrete units are further extended into a 3D supramolecular structure through intermolecular hydrogen bonds and π–π interactions.