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Metal‐Dependent Topologies and Water Aggregations in Copper and Nickel Carboxycinnamate Coordination Polymers with a Long‐Spanning Dipyridylamide Ligand
Author(s) -
Rogers Ciana M.,
Glatz Erika J.,
LaDuca Robert L.
Publication year - 2015
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.201500051
Subject(s) - coordination polymer , nickel , piperazine , ligand (biochemistry) , crystallography , molecule , carboxylate , topology (electrical circuits) , metal , acentric factor , antiferromagnetism , copper , materials science , crystal structure , polymer , chemistry , stereochemistry , organic chemistry , physics , biochemistry , receptor , mathematics , combinatorics , metallurgy , condensed matter physics , composite material
Hydrothermal reaction of the requisite metal nitrate, carboxycinnamic acid (H 2 cca), and the long‐spanning dipyridylamide bis(4‐pyridylformyl)piperazine (4‐bpfp) generate crystalline coordination polymers whose topology depends critically on the metal coordination geometric preference. These two new phases were structurally characterized by single‐crystal X‐ray diffraction. {[Cu(cca)(4‐bpfp)] · 2.5H 2 O} n ( 1 ) manifests a non‐interpenetrated 6‐connected pcu net based on chain motifs featuring carboxylate‐bridged {Cu 2 (OCO) 2 } dinuclear units, with embedded D(5) water molecule chains. {[Ni(cca)(4‐bpfp)(H 2 O) 2 ] · 3H 2 O} n ( 2 ) displays an acentric twofold interpenetrated 4‐connected 6 6 dia network topology with entrapped R(4)A(1) water molecule rings. Variable temperature magnetic studies performed on 1 revealed very weak antiferromagnetic coupling within its dinuclear units. Thermal properties of these two new materials are also discussed.