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合成了一个新型草酸根桥联的二维配合物{[Cu(en)_2]_4[KFe(C_2O_4)_3]_4}_n,并进行了晶体结构测试和磁性研究.晶体结构分析显示:K~+离子为罕见的八配位环境,2个C_2O_4~(2-)和2个或1个K~+离子长程桥联2个Fe~Ⅲ离子,形成一个二维网状的[KFe(C_2O_4)_3]_n~(2n-)骨架,[Cu(en)_2]~(2+)单元通过(en)N—H…O(C_2O_4)氢键与[KFe(C_2O_4)_3]_n~(2n-)骨架连接.变温磁化率测量表明:Fe~Ⅲ与Fe~Ⅲ间存在着弱的磁相互作用,J=-0.17cm~(-1).
A new oxalate bridged two dimensional complex {[Cu (en) _2] _4 [KFe (C_2O_4) _3] _4} _n was synthesized and its crystal structure and magnetic properties were studied. + Ions are rare octahedral coordination environments. Two C_2O_4 ~ (2-) and two or one K ~ + ions bridge two Fe ~ Ⅲ ions in a long distance to form a two-dimensional network [KFe (C_2O_4) The structure of [Cu (en) _2] ~ (2+) units is connected with [KFe (C_2O_4) _3] _n ~ (2n- ) Skeletal connections.The measurement of the temperature-dependent magnetic susceptibility shows that there is a weak magnetic interaction between Fe ~ Ⅲ and Fe ~ Ⅲ, J = -0.17cm -1.