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Bis(triethanolamine)bis(μ 2 ‐trimesato)dicobalt(II): a Co II dimer with an unreported two‐dimensional supramolecular topology formed from triethanolamine and trimesic acid ligands
Author(s) -
Xie Min,
Xu Guo-Hai
Publication year - 2016
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229616000504
Subject(s) - trimesic acid , supramolecular chemistry , triethanolamine , hydrogen bond , crystallography , dimer , carboxylate , crystal structure , topology (electrical circuits) , molecule , crystal engineering , chemistry , materials science , stereochemistry , organic chemistry , analytical chemistry (journal) , mathematics , combinatorics
Supramolecular networks are an important subset in the field of coordination polymer (CP) frameworks and are widely encountered in crystal engineering research. The search for novel topologies continues to be a significant goal in CP chemistry. The dimeric compound bis(μ‐5‐carboxybenzene‐1,3‐dicarboxylato‐κ 2 O 1 : O 3 )bis[(triethanolamine‐κ 4 N , O , O ′, O ′′)cobalt(II)], [Co 2 (C 9 H 4 O 6 ) 2 (C 6 H 15 NO 3 ) 2 ], formed from the coligands 5‐carboxybenzene‐1,3‐dicarboxylate (tmaH 2− ) and triethanolamine (teaH 3 ), namely [Co(μ 2 ‐tmaH)(teaH 3 )] 2 , was synthesized and characterized by single‐crystal and powder X‐ray diffraction analyses, IR spectroscopy, thermogravimetric analysis (TGA) and magnetic measurements. The crystal structure features a zero‐dimensional molecular structure consisting of centrosymmetric macrocyclic dinuclear complexes. Four classical hydrogen bonds between carboxylate groups and hydroxyethyl arms stabilize and extend the molecules into a two‐dimensional supramolecular network. The topological analysis indicates that an unreported (3,5)‐binodal supramolecular topology with a short Schläfli symbol of (4.5.6)(4.5 5 .6 3 .7) can be achieved by means of intermolecular hydrogen bonds. The crystal structure accounts for the potential to obtain unique topological types from two excellent hydrogen‐bonding candidates, i.e. tmaH 3 and teaH 3 . A variable‐temperature magnetic study shows the existence of antiferromagnetic behaviour in the complex.