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Theoretical Study of Ni(N_4)_2, Ni(C_4H_4)_2, and Ni(C_2O_2)_2 Complexes

机译:Ni(N_4)_2,Ni(C_4H_4)_2和Ni(C_2O_2)_2配合物的理论研究

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摘要

Ab initio molecular orbital theory and density functional theory have been applied to study the isoelectronic-liganded NiL_2 (L = N_4~(2-), C_4H_4~(2-), and C_2O_2~(2-)) sandwich complexes at the MP2/6-31G~*. B3LYP/6-31G~*, B3LYP/6-311+G~*, and BHLYP/6-311+G (3df, 3pd) levels of theory. The stable structure for Ni(N_4)_2 is a staggered conformer with D_(4d) symmetry. The dissociation barriers for one N_2 elimination and two N_2 eliminations for Ni(N_4)_2 are 37.1 and 84.9 kcal/mol, respectively, at the B3LYP/6-31G~* level of theory, which suggest that Ni(N_4)_2 is kinetically stable enough to resist dissociation. The calculated reaction energies for the dissociation of Ni(N_4)_2 is kinetically stable enough to resist dissociation. The calculated reaction energies for the dissociation of Ni(N_4)_2, Ni(C_4H_4)_2, and Ni(C_2O_2)_2 at the B3LYP/6-31G~* level of theory suggest that both Ni(N_4)_2 and Ni(C_2O_2)_2 are high-energy species; however, Ni(C_4H_4)_2 is not.
机译:从头算分子轨道理论和密度泛函理论已被用于研究等位电子配体的NiL_2(L = N_4〜(2-),C_4H_4〜(2-)和C_2O_2〜(2-))夹心复合物6-31G〜*。 B3LYP / 6-31G〜*,B3LYP / 6-311 + G〜*和BHLYP / 6-311 + G(3df,3pd)的理论水平。 Ni(N_4)_2的稳定结构是具有D_(4d)对称性的交错构象异构体。在理论上的B3LYP / 6-31G〜*水平上,Ni(N_4)_2的一个N_2消除和两个N_2消除的解离势垒分别为37.1和84.9 kcal / mol,这表明Ni(N_4)_2在动力学上足够稳定以抵抗解离。 Ni(N_4)_2的解离计算出的反应能在动力学上足够稳定,可以抵抗解离。 Ni(N_4)_2,Ni(C_4H_4)_2和Ni(C_2O_2)_2在理论上的B3LYP / 6-31G〜*能级解离的反应能表明,Ni(N_4)_2和Ni(C_2O_2 )_2是高能物种;但是,Ni(C_4H_4)_2不是。

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