Publication Date:
2015-08-29
Description:
Based on the bis-triazole ligand 2, 6-bis(1, 2,4-triazole-4-yl)pyridine (L), the triazole-iron(II) complexes [Fe(L) 2 (dca) 2 (H 2 O) 2 ] · 2H 2 O ( 1 ) (Nadca = sodium dicyanamide), {[Fe(μ 2 -L) 2 (H 2 O) 2 ]Cl 2 } n ( 2 ), and {[Fe(μ 2 -L) 2 (H 2 O) 2 ](ClO 4 ) 2 · L · H 2 O} n ( 3 ) were isolated by solvent diffusion methods. When iron(II) salts and Nadca were used, compound 1 was isolated, which contains mononuclear Fe(L) 2 (dca) 2 (H 2 O) 2 units. When FeCl 2 or FeClO 4 were used, one-dimensional (1D) cation iron(II) chains ( 2 ) and two-dimensional (2D) cation iron(II) networks ( 3 ) were isolated indicating anion directing structural diversity. Moreover, variable-temperature magnetic susceptibility data of 1 – 3 were recorded in the temperature range 2–300 K. The magnetic curve of complex 2 was fitted by using the classical spin Heisenberg chain model indicating anti-ferromagnetic interactions ( J = –5.31 cm –1 ). Obviously complexes 1 – 3 show no detectable thermal spin crossover behaviors, the lack of spin-crossover behavior may be correlated with FeN 4 O 2 coordination spheres in 1 – 3 .
Print ISSN:
0044-2313
Electronic ISSN:
1521-3749
Topics:
Chemistry and Pharmacology
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