Assembly of a mononuclear ferrous site using a bulky aldehyde-imidazole ligand.

Assembly of a mononuclear ferrous site using a bulky aldehyde-imidazole ligand.
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DOI:
10.1016/j.ica.2017.05.028
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发表时间:
2017-08-01
影响因子:
2.8
通讯作者:
Chavez FA
Chavez FA
中科院分区:
化学3区
文献类型:
--
作者:
Li J;Molenda MA;Biros SM;Staples RJ;Chavez FA

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一种新的铁(II)配合物已制备和表征。[Fe(TrImA)2(OTf)2](1,TrImA = 1-三苯甲基咪唑-4-甲醛)。用X射线晶体学方法测定了1的固态结构。化合物1属于单斜晶系,空间群为P21/c,a = 10.8323(18)B = 8.1606(13),c = 24.818(4)。铁中心配位到两个咪唑基团、两个侧链咪唑衍生的羰基氧和两个三氟甲磺酸酯氧。该复合物是高自旋之间的300和20 K的可变场变温磁性测量表明。磁测数据的拟合结果为g = 2.17,D = 4.05 cm−1。对于1存在大的HOMO-LUMO带隙能量(4.49eV),表明高稳定性。
A new iron(II) complex has been prepared and characterized. [Fe(TrImA)2(OTf)2] (1, TrImA = 1-Tritylimidazole-4-carboxaldehyde). The solid state structure of 1 has been determined by X-ray crystallography. Compound 1 crystallizes in monoclinic space group P21/c, with a = 10.8323(18) Å, b = 8.1606(13) Å and c = 24.818(4) Å. The iron center is coordinated to two imidazole groups, two pendant aldehyde-derived carbonyl oxygens and two triflate oxygens. The complex is high spin between 300 and 20 K as indicated by variable field variable temperature magnetic measurements. A fit of the magnetic data yielded g = 2.17 and D = 4.05 cm−1. A large HOMO-LUMO gap energy (4.49 eV) exists for 1 indicating high stability.
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