Temperature-Dependent in Situ Ligand Cyclization via C=C Coupling and Formation of a Spin-Crossover Iron(II) Coordination Polymer
- 化学化工－已发表论文 
The reaction of N(1),N(2)-bis(pyridin-4-ylmethylene)ethane-1,2-diamine (L) with Fe(NCS)(2) under various temperatures gave rise to three iron(II) coordination polymers, namely, one-dimensional [Fe(L')(NCS)(2)] (1), two-dimensional [Fe(L)(2)(NCS)(2)]center dot H(2)O (2), and one-dimensional [Fe(L)(2)(NCS)(2)]center dot 2CH(2)Cl(2)center dot 4MeOH (3). The formation of 1 involved an in situ C=C coupling reaction, L to L' [L' = 5,6-di(pyridin-4-yl)-1,2,3,4-tetrahydropyrazine], which was catalyzed by cyanide ions decomposed from thiocyanates; the manganese(II) (1a) and zinc(II) (1b) analogues of 1 were also synthesized for comparison. Magnetic studies showed that complex 1 underwent a pressure-dependent one-step incomplete spin transition whereas complexes 2 and 3 were paramagnetic in the whole temperature range.
CitationInorg. Chem., 2011, 50 (3）：911–917