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Syntheses, Structures, and Magnetic Properties of Two Novel Cobalt(II) Coordination Polymers Constructed from Pyridine‐2,6‐dicarboxylic Acid N‐oxide (PDCO)
Author(s) -
Wen LiLi,
Tian ZhengFang,
Lin JianGuo,
Zhu HuiZhen,
Meng QingJin
Publication year - 2006
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.200500480
Subject(s) - crystallography , chemistry , hydrogen bond , antiferromagnetism , dicarboxylic acid , pyridine , cobalt , oxide , metal organic framework , coordination polymer , zigzag , crystal structure , inorganic chemistry , polymer chemistry , molecule , medicinal chemistry , organic chemistry , physics , geometry , mathematics , adsorption , condensed matter physics
Two new cobalt(II) coordination polymers, [Co(PDCO)(H 2 O) 2 ] n ( 1 ) and [Co(PDCO)(bix)(2H 2 O) 2 ·H 2 O] n ( 2 ) ( PDCO= pyridine‐2,6‐dicarboxylic acid N‐oxide, bix = 1,4‐bis(imidazol‐1‐ylmethyl)‐benzene) have been synthesized under hydrothermal conditions. Single‐crystal X‐ray analyses show that compound 1 is a 1D helical chainlike structure with 4 1 screw axes parallel to the crystallographic c‐ axis and interchain hydrogen‐bonding interactions further result in a 3D framework; for compound 2 , each bix ligand connects two Co1 atoms (or two Co2 atoms) to give a zigzag chain structure and these 1D chains are connected by offset face‐to‐face π ··· π and hydrogen bond interactions to generate a 3D architecture. The thermogravimetric analyses were investigated for 1 and 2 . The determination of variable temperature magnetic susceptibilities indicates an antiferromagnetic interaction between the metal atoms for 1 and 2 .