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The structures of [Nd 2 (O 2 C(CH 2 ) 4 CO 2 ) 3 (H 2 O) 4 ]·6 H 2 O and [Nd 2 (O 2 C(CH 2 ) 4 CO 2 ) 3 (H 2 O) 2 ]·H 2 O synthesized from solutions at 293 and 353 K, respectively, have been solved, at 120 and 293 K. In both compounds infinite chains built of Nd(III) cations bridged by carboxylates and linked by adipate dianions have been found. Hydration and coordination waters are inside channels parallel to the chains. Both compounds exhibit a magnetic ordering transition, T C = 280(2) K, a ferromagnetic coupled Curie–Weiss behavior above T C , and a χ ′ –1 non-linear thermal dependence at low temperatures. The number of coordination and hydration waters strongly affects channels size and geometry, and, in addition, seems to influence the overall magnetic behavior. To cite this article: G. Punte et al., C.R. Chimie 8 ( 2005 ) . |
