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https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/25311
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| Title: | Synthesis, crystal structure and magnetic properties of bis(1,1,1,5,5,5-hexafluoropentane-2,4-dionato) manganese(II) complexes with diazine ligands |
| Authors: | Hong, D. M.;魏和祥;Wei, Ho-hsiang;Chang, K. H.;Lee, G. H.;Wang, Yu |
| Contributors: | 淡江大學化學學系 |
| Keywords: | crystal structure;magnetic properties;manganese complexes;binuclear complexes;diazine complexes |
| Date: | 1998-09-30 |
| Issue Date: | 2009-12-01 |
| Publisher: | Elsevier |
| Abstract: | One dinuclear [Mn2(hfac)4(μ-pyz)(H2O)2]2H2O (1) and three mononuclear complexes [Mn(hfac)2 (pym)(H2O)] (2), [Mn(hfac)2(pydz)2] (3), and [Mn(hfac)2(mpydz)2] (4) (Hhfac=1,1,1,5,5,5-hexafluoropentane-2,4-dione, pyz=pyrazine, pym=pyrimidine, pydz=pyridazine, and mpydz=3-methylpyridazine) have been synthesized and their crystal structures and cryomagnetic properties have been investigated. Complex 1 has a centrosymmetric dinuclear structure with two adjacent manganese atoms linked by a pyz ligand. The geometry about each manganese atom is distorted octahedral with NO5 coordination sphere. The structure of complex 2 is a mononuclear manganese complex with a distorted octahedral geometry of NO5 coordination sphere. The crystal structures of complexes 3 and 4 consist of mononuclear manganese complex with the cis-N2O4 six-coordination sphere. The temperature dependence of magnetic data for 1 revealed a dinuclear spin (S1=S2=5\2) weak antiferromagnetic exchange interaction with J= −0.47 cm−1. Complexes 2–4 play a cryomagnetic behaviour followed the Curie–Weiss law. |
| Relation: | Polyhedron 17(20), pp.3565-3573 |
| DOI: | 10.1016/S0277-5387(98)00150-8 |
| Appears in Collections: | [Graduate Institute & Department of Chemistry] Journal Article
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