Linkage Isomers of 4-Methylimidazolate Mn(II) Porphyrinates: Hindered or Unhindered?
Linkage Isomers of 4-Methylimidazolate Mn(II) Porphyrinates: Hindered or Unhindered?
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4-甲基咪唑锰(II)卟啉盐的连接异构体：受阻还是无阻？
DOI：
10.1021/acs.inorgchem.1c00755
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发表时间：
2021-05
影响因子：
4.6
通讯作者：
Lin Zeyuan
中科院分区：
文献类型：
--
作者：
Zhao Jianping;Qian Fei;Guo Wenping;Li Jianfeng;Lin Zeyuan
三种不同的锰（II）卟啉已被用于与4 - 甲基咪唑（4 - MeIm⁻）反应，并且通过紫外 - 可见光谱、单晶X射线和电子顺磁共振波谱对五配位产物进行了表征。
Three different manganese(II) porphyrins have been exploited to react with 4-methylimidazolate (4-MeIm-), and the five-coordinate products are characterized by ultraviolet-visible, single-crystal X-ray, and electronic paramagnetic resonance spectroscopies. Interestingly, 4-MeIm- is found to bond to the metal center through either of the two N atoms (N1 or N3), which yielded two linkage isomers with either an unhindered or a hindered ligand conformation, respectively. Investigations revealed it is the large metal out-of-plane displacements (Δ24 and Δ4 ≥ 0.59 Å) that have rendered the equivalence of two isomers with a small energy difference (5.2-8.3 kJ/mol). The nonbonded intra- and intermolecular interactions thus become crucial factors in the balance of linkage isomerization. All of the products in both solution and solid states show the same characteristic resonances of high-spin Mn(II) (S = 5/2) with g⊥ ≈ 5.9 and g∥ ≈ 2.0 at 4 K, consistent with the weak effects of the axial ligand on core conformation and metal electronic configurations. Zero-field splitting parameters obtained through simulations are also reported.
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影响因子：
6.1
作者：
Krause L;Herbst-Irmer R;Sheldrick GM;Stalke D
通讯作者：
Stalke D
影响因子：
15
作者：
Kirner Jf;Reed Ch;S. Wr
通讯作者：
Kirner Jf;Reed Ch;S. Wr
五配位铁卟啉卡宾配合物的电子构型和配体性质：实验研究
影响因子：
15
作者：
Liu, Yulong;Xu, Wei;Li, Jianfeng
通讯作者：
Li, Jianfeng
影响因子：
4.5
作者：
W. Zheng;N. Shan;Lian-xiang Yu;Xingqiao Wang
通讯作者：
W. Zheng;N. Shan;Lian-xiang Yu;Xingqiao Wang
DOI：
10.1098/rspa.1924.0081
发表时间：
1924-10-01
期刊：
PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-CONTAINING PAPERS OF A MATHEMATICAL AND PHYSICAL CHARACTER
影响因子：
--
作者：
Jones, JE
通讯作者：
Jones, JE