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Different Metal Aggregation in Copper Acetate Chain Coordination Polymers with Dipyridyl Tethers Bearing Hydrogen Bonding Capable Functional Groups
Author(s) -
Uebler Jacob W.,
Stone Brandon S.,
LaDuca Robert L.
Publication year - 2013
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.201300199
Subject(s) - copper , chemistry , crystallography , hydrogen bond , ligand (biochemistry) , spin canting , amide , ferrimagnetism , antiferromagnetism , dissociation (chemistry) , coordination polymer , stereochemistry , polymer chemistry , molecule , crystal structure , organic chemistry , physics , biochemistry , receptor , magnetization , quantum mechanics , magnetic field , condensed matter physics
Hydrothermal synthesis has afforded a pair of divalent copper acetate coordination polymers containing either 4, 4′‐dipyridylamine (dpa) or 4‐pyridylisonicotinamide (4‐pina), both of which hydrogen‐bonding capable central functional groups. X‐ray crystallography revealed that both exhibit a 1D chain dimensionality. Use of the kinked tethering ligand dpa produced [Cu(OAc) 2 (dpa)] n ( 1 ), which possesses a simple chain based on dpa linkage of isolated copper ions. On the other hand, employing the straighter amide ligand 4‐pina generated {[Cu(OAc) 2 (4‐pina)] · 0.5H 2 O} n ( 2 ), which exhibits {Cu 2 O 2 } rhomboid dimers formed through bridging acetate ligands. Weak antiferromagnetic coupling [ g = 1.984(3), J = –3.2(3) cm –1 ] was observed within the axial‐equatorial bridged {Cu 2 O 2 } dimers in 2 , with possible ferrimagnetism due to spin canting below 11 K.