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Use of Different Unsaturated Dicarboxylates Toward the Design of New 3D and 2D Networks of Copper( II )
Author(s) -
Mukherjee Partha Sarathi,
Ghoshal Debajyoti,
Zangrando Ennio,
Mallah Talal,
Chaudhuri Nirmalendu Ray
Publication year - 2004
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200400328
Subject(s) - chemistry , denticity , copper , molecule , chelation , crystallography , ion , metal ions in aqueous solution , antiferromagnetism , magnetic susceptibility , metal , carboxylate , coordination polymer , polymer chemistry , polyethylene terephthalate , stereochemistry , inorganic chemistry , organic chemistry , crystal structure , materials science , condensed matter physics , physics , composite material
Two new polymeric complexes of copper( II ), [Cu(L1)(μ‐fum)(μ‐H 2 O)] n ( 1 ) (fum = fumarate dianion; L1 = N , N′ ‐dimethylethane‐1,2‐diamine) and [Cu(L2)(μ‐tp)] n ( 2 ) [tp = terephthalate dianion; L2 = N ‐(2‐aminoethyl)‐3‐amino‐1‐propanol], have been synthesized. The molecular structures are determined by X‐ray crystallography. Complex 1 is a fumarato‐bridged zig‐zag 1D chain of Cu II −L1, which is extended to a 3D coordination polymer through bridging water molecules. Complex 2 is a chain of Cu II in which the terephthalate anions bridge in alternate bis(bidentate) and bis(monodentate) fashions. The coexistence of such types of bridging modes of terephthalate ions in a single molecule is unprecedented. The chelating terephthalate ion is linked to an equatorial and an axial site of consecutive metal ions, while the other terephthalate ion is axially linked to Cu II centers. Both the complexes are characterized by variable‐temperature susceptibility measurements at room temperature down to 4 K. Fitting of the magnetic data reveals the existence of weak antiferromagnetic interactions through the bridging dicarboxylate pathways. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)