Syntheses and Structures of New Trinuclear MIILnMII (M = Ni,Co; Ln = Gd,Ce) Complexes with 2, 6‐Bis(acetobenzoyl)pyridine |
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| Authors: | Thi Nguyet Trieu Minh Hai Nguyen Ulrich Abram Hung Huy Nguyen |
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| Affiliation: | 1. Department of Chemistry, Hanoi University of Science, Le Thanh Tong str.19, Hanoi, Vietnam;2. Institute of Chemistry and Biochemistry, Freie Universit?t Berlin, Fabeckstrasse 34–36, 14195 Berlin, Germany |
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| Abstract: | One‐pot reactions of 2, 6‐bis(acetobenzoyl)pyridine (H2L) with a mixture of LnCl3 (Ln = Ce, Gd) and Ni(CH3COO)2 (ratio 2:1:2) in CH2Cl2/MeOH in the presence of a supporting base like Et3N give trinuclear complexes with the general composition [Ni2Ln(L)2(CH3COO)3(MeOH)2/3] ( 1 ) in high yields. Trinuclear [Ni2Ln(L)2(PhCOO)3(MeOH)2] ( 2 ) complexes are formed when similar reactions are performed starting from NiCl2, and benzoic acid (PhCOOH) is added subsequently. Under the same conditions, reactions with the corresponding cobalt(II) salts result in the formation of a neutral [Co8(μ3‐O)2(L)6] complex, which has a bis(triple‐helical) structure. The cobalt(II) analogues to compounds 1 and 2 , however, can be synthesized by a pre‐treatment of the lanthanide salts with H2L and subsequent addition of the cobalt salts, and benzoic acid (in the case of 2 ). |
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| Keywords: | Lanthanide complexes Trinuclear complexes d‐f Mixed metal complexes β ‐Diketonate X‐ray structure |
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