Syntheses and Magnetism of μ-1, 3, 5-Benzenetricarboxylato Trinuclear Manganese(Ⅱ) and Nickel (Ⅱ) Complexes

Abstract

Abstract: Two new manganese(Ⅱ) trinuclear complexes and two new nickel (Ⅱ) trinuclear compIexes, namely, [Mn₃(BZT)(Phen)₆] (ClO₄)₃(complex 1), [Mn (BZT)· (Nphen)₆] (ClO₄)₃(complex 2), [Ni₃(BZT) (Phen)₆] (ClO₄)₃· 5H₂O (complex3) and [Ni₃(BZT) (Nphen)₆] (ClO₄)₃(complex 4) (BZT=1, 3, 5-benzenetricarboxylato, Phen=1, 10-phenthroline, Nphen=5-nitro-1, 10-phenanthroline)have been synthesized. The complexes were characterized using elemental analysis,IRand electronic reflection spectra. These complexes are proposed to have extended 1, 3, 5-benzenetricarboxylato-bridged structure and to consist of three manganese (Ⅱ) or three nickel(Ⅱ). The X-band ESRspectra of the complex 1 and complex 2were recorded at room temperature. The variable-temperature magnetic susceptibilities of complex 1 and complex 3 were measured over 4. 2-300 K. According to experimental results of the variable-temperature magnetic susceptibility, the magnetic interaction between the paramagnetic centers is too weak to be detected using the usual magnetic susceptibility technique.

Key words: Manganese (Ⅱ) complex, Nickel (Ⅱ) complex, 1,3,5-benzenetricarboxylic acid, Magnetism

SHI Jing-min, LIAO Dai-zheng, CHENG Peng, JIANG Zong-hui, MIAO Ming-ming, WANG Geng-lin. Syntheses and Magnetism of μ-1, 3, 5-Benzenetricarboxylato Trinuclear Manganese(Ⅱ) and Nickel (Ⅱ) Complexes[J]. Chemical Research in Chinese Universities, 1996, 12(1): 1-5.

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Syntheses and Magnetism of μ-1, 3, 5-Benzenetricarboxylato Trinuclear Manganese(Ⅱ) and Nickel (Ⅱ) Complexes

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