期刊
JOURNAL OF MOLECULAR STRUCTURE
卷 994, 期 1-3, 页码 289-294出版社
ELSEVIER
DOI: 10.1016/j.molstruc.2011.03.035
关键词
[La(acac)(3)]; Iodine; DDQ; Triiodide; Charge-transfer; Spectra
The interaction of the donor La(III)acetylacetonate, [La(acac)(3)], with iodine as a sigma-acceptor and with 2,3-dichloro-5,6 dicyano-1,4-benzoquinone, (DDQ) as a pi-acceptor have been studied in the solvents CH2Cl2, CHCl3 and CCl4 at room temperature. The obtained results indicate the formation of 1:1 charge-transfer complexes. The electronic and infrared absorptions and elemental analysis of the formed complexes indicate that the complexes are formulated as the triiodide [(La(acac)(3))(2)I](+)center dot I-3(-) and [La(acac)(3)(DDQ)]. Far-infrared spectrum shows that the triiodide ion is nonlinear with C-2v symmetry. The values of the equilibrium constants (K) and obsorptivities (epsilon) for both the formed CT-complexes are calculated and discussed in term of reaction stoichiometry values and molecular steric hindrance. Mid infrared spectra suggest that the electron donation from [La(acac)(3)] to the donors I-2 or DDQ could mainly take place through the oxygen atoms in addition to the acac ring pi-molecular orbitals. (c) 2011 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据