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One‐ and two‐dimensional Cd II coordination polymers constructed from 2‐(2‐methyl‐1 H ‐benzimidazol‐1‐yl)acetate ligands
Author(s) -
Li Qiang,
Wang HuiTing,
Ye Qiong
Publication year - 2014
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/s2053229614020853
Subject(s) - stacking , crystallography , chemistry , atom (system on chip) , supramolecular chemistry , ring (chemistry) , stereochemistry , crystal structure , coordination polymer , cadmium , computer science , embedded system , organic chemistry
The one‐ and two‐dimensional polymorphic cadmium polycarboxylate coordination polymers, catena ‐poly[bis[μ 2 ‐2‐(2‐methyl‐1 H ‐benzimidazol‐1‐yl)acetato‐κ 3 N 3 : O , O ′]cadmium(II)], [Cd(C 10 H 9 N 2 O 2 ) 2 ] n , and poly[bis[μ 2 ‐2‐(2‐methyl‐1 H ‐benzimidazol‐1‐yl)acetato‐κ 3 N 3 : O , O ′]cadmium(II)], also [Cd(C 10 H 9 N 2 O 2 ) 2 ] n , were prepared under solvothermal conditions. In each structure, each Cd II atom is coordinated by four O atoms and two N atoms from four different ligands. In the former structure, two crystallographically independent Cd II atoms are located on twofold symmetry axes and doubly bridged in a μ 2 ‐ N : O , O ′‐mode by the ligands into correspondingly independent chains that run in the [100] and [010] directions. Chains containing crystallographically related Cd II atoms are linked into sheets via π–π stacking interactions. Sheets containing one of the distinct types of Cd II atom are stacked perpendicular to [001] and alternate with sheets containing the other type of Cd II atom. The second complex is a two‐dimensional homometallic Cd II (4,4) net structure in which each Cd II atom is singly bridged to four neighbouring Cd II atoms by four ligands also acting in a μ 2 ‐ N : O , O ′‐mode. A square‐grid network results and the three‐dimensional supramolecular framework is completed by π–π stacking interactions between the aromatic ring systems.