Neutral tetranuclear Cu(II) complex of 2,6-di(5-trifluoromethylpyrazol-3-yl)pyridine: Synthesis, characterization and its transformation with selected aza-ligands
摘要:
New tetranuclear Cu(II) complex [Cu-4(L)(4)]center dot MeCN (1) with 2,6-di(5-trifluoromethyl-1H-pyrazol-3-yl)pyridine (H2L) was synthesized. It has been shown that treatment of 1 with selected aza-ligands (pyridine, 2,2'- and 4,4'-bipyridyl, 2,3,5,6-tetra-(pyridine-2-yl)pyrazine, 2,2';6',2 ''-terpyridine and 1,4-diazabicyclo[2.2.2]octane) leads to formation of other Cu(II) complexes with different nuclearity: [Cu(L)py(2)] (2), [Cu(L)(2,2'-bpy)] (3), [Cu(L)(2)(tPPz)]center dot THF (5), [Cu(L)tpy]center dot C6H5CN (4), {[Cu-2(L)(2)(4,4'-bpy)(2)]center dot(C6H5CH3)center dot MeCN}(n) (6) and {[Cu(L)DABCO]center dot 2MeCN}(n) (7). Obtained compounds were characterized by IR spectroscopy, X-ray crystallography data, EPR and SQUID magnetic measurements. (C) 2013 Elsevier Ltd. All rights reserved.