A novel tridentate co-ordination mode for the carbonatonickel system
A novel tridentate co-ordination mode for the carbonatonickel system
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DOI：
10.1039/a605466h
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发表时间：
1997-02-07
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影响因子：
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通讯作者：
FontBardia, M
中科院分区：
文献类型：
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作者：
Escuer, A;Vicente, R;FontBardia, M
三核化合物[Ni-2（mu-Co-3）（dmpd）（4）（H2O）][Ni（dmpd）（2）（H2O）（2）][ClO 4]（4）。高氯酸镍（Ⅱ）和2，2-二甲基丙-1，3-二胺（dmpd）的碱性溶液与大气中的CO2反应生成H2O，属正交晶系，空间群Pcab，a = 18.634（10），B = 25.447（8），c = 25.598（4）埃，Z = 8，R = 0.0437。三个镍原子在三种不同的环境中显示出八面体配位; Ni（CO 3-O，O '）（dmpd）（2）、Ni（CO 3-O“）（dmpd）（2）（H2O）和Ni（dmpd）（2）（H2O）（2）。碳酸根阴离子作为两个镍离子之间的桥，而[Ni（dmpd）（2）（H2O）（2）]（2+）亚基通过氢键连接到双核基团。双核[Ni-2（mu-CO 3）（dmpd）（4）（H2O）]（2+）亚基显示出中等弱的反铁磁耦合，J值为-7.8 cm（-1）。在碳酸酯配体中发现的三齿配位模式以前没有报道过镍。讨论了它的磁性。
The trinuclear compound [Ni-2(mu-Co-3)(dmpd)(4)(H2O)][Ni(dmpd)(2)(H2O)(2)][ClO4](4) . H2O was obtained from the reaction of basic solutions of nickel(II) perchlorate and 2,2-dimethylpropane-1,3-diamine (dmpd) with atmospheric CO2 It crystallises in the orthorhombic system, space group Pcab, with a = 18.634(10), b = 25.447(8), c = 25.598(4) Angstrom, Z = 8, R = 0.0437. The three nickel atoms show octahedral co-ordination with three different environments; Ni(CO3-O,O')(dmpd)(2), Ni(CO3-O '')(dmpd)(2)(H2O) and Ni(dmpd)(2)(H2O)(2). The carbonate anion acts as a bridge between two nickel ions whereas the [Ni(dmpd)(2)(H2O)(2)](2+) subunit is linked by hydrogen bonds to the dinuclear group. The dinuclear [Ni-2(mu-CO3)(dmpd)(4)(H2O)](2+) subunit shows a moderately weak antiferromagnetic coupling with a J value of -7.8 cm(-1). The tridentate co-ordination mode found in the carbonate ligand has not previously been reported for nickel. Its magnetic behaviour is discussed.