名称:
Novel one-dimensional cyano-bridged chain complexes [Ln(bet)2(H2O)3Fe(CN)6]n (Ln=Nd, Pr, Sm, Gd; bet=betaine): synthesis, crystal structure and magnetochemistry
摘要:
Using betaine ((CH3)(3)N+CH3CO2-) as the hybrid ligand, some novel isomorphous cyano-bridged complexes [Ln(bet)(2)(H2O)(3)Fe(CN)(6)](n) (Ln = Pr, Sm, Eu, Gd, Tb, Dy; bet = betaine) (abbreviated as LnFe) have been synthesized, which possess a chain structure through two approximately parallel trans-cyano-bridges between Pr (and Gd) and Fe atoms and C-N . . .H-O hydrogen bonding. Variable temperature susceptibilities show that there exist weak antiferromagnetic interactions between rare earth ions (Pr, Nd, Sm, Gd) and the Fe atom mainly through CN bridges. (C) 2001 Elsevier Science B.V. All rights reserved.