کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1339970 | 1500292 | 2016 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Chemical assembly of an antiferromagnetic macrocyclic molecule containing two inner CoII centers from polymeric cobalt pivalate Chemical assembly of an antiferromagnetic macrocyclic molecule containing two inner CoII centers from polymeric cobalt pivalate](/preview/png/1339970.png)
The reaction of the polymer {Co(Piv)2}n (Piv is the pivalic acid anion) with triethylenetetramine (L1) (M:L1 = 2:1) in MeCN affords the polymeric compound [Co2L1(η2-Piv)2(μ-Piv)2]n (1) containing asymmetric dicobalt units coordinated by one chelate ligand L1. The reaction of 1 with an additional amount of L1 (M:L1 = 1:1) in MeCN gives rise to the binuclear molecule Co2L12(Piv)4 (2), where L1 acts as a chelate-bridging ligand. Compounds analogous to 2 with M = Fe (3) were prepared by the reaction of the polymer {Fe(Piv)2}n with L1 in MeCN using the reagent ratio M:L1 = 1:1. The reaction of the compound CoL12(Piv)4 (2) with isophthalaldehyde (L2) produces the binuclear complex Co2L3(Piv)4 (4) containing the new [2 + 2] macrocyclic ligand L3 as a result of condensation of L1 with L2. All newly synthesized compounds were characterized by X-ray diffraction and magnetic measurements.
New high spin binuclear of CoII and FeII with chelate-bridging triethylenetetramine were synthesized. The formation of macrocyclic molecule at the cobalt centers as the mediators chemical assembling was found.Figure optionsDownload as PowerPoint slide
Journal: Polyhedron - Volume 28, Issues 9–10, 22 June 2009, Pages 2010–2016