Synthesis, Redox Properties, and EPR Spectroscopy of Manganese(III) Complexes of the Ligand N,N-Bis(2-hydroxybenzyl)-N'-2-hydroxybenzylidene-1,2-diaminoethane: Formation of Mononuclear, Dinuclear, and Even Higher Nuclearity Complexes

Heimo Schmitt; Reiner Lomoth; Ann Magnuson; Jonathan Park; Jacob Fryxelius; Mikael Kritikos; Jerker Martensson; Leif Hammarstrom; Licheng Sun; Bjorn Akermark

首页> 外文期刊>Chemistry: A European journal >Synthesis, Redox Properties, and EPR Spectroscopy of Manganese(III) Complexes of the Ligand N,N-Bis(2-hydroxybenzyl)-N'-2-hydroxybenzylidene-1,2-diaminoethane: Formation of Mononuclear, Dinuclear, and Even Higher Nuclearity Complexes

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Synthesis, Redox Properties, and EPR Spectroscopy of Manganese(III) Complexes of the Ligand N,N-Bis(2-hydroxybenzyl)-N'-2-hydroxybenzylidene-1,2-diaminoethane: Formation of Mononuclear, Dinuclear, and Even Higher Nuclearity Complexes

机译：N，N-双（2-羟基苄基）-N'-2-羟基苄叉基-1,2-二氨基乙烷配体的锰（III）配合物的合成，氧化还原性质和EPR光谱：单核，双核甚至更高价的形成核复合体

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The synthesis and characterization of the title trisphenolate ligand are described. From its reaction with manganese(III) three complexes were isolated. The crystal structures revealed one pentacoordinate monomer and two similar dimers with different solvents of crystallization. In the dimers the metal ions are hexacoordinate and connected through bridging of two phenolates. A combination of electrochemistry and EPR spectroscopy showed that, in acetonitrile, the isolated batches well all identical and mainly monomeric, indicating that the mononuclear complex is in equilibrium with the dimer and perhaps also with complexes of higher nuclearity, as suggested by the detection of both the trimer and the tetramer by electrospray ionization mass spectrometry (ESI-MS). The successful use of the monomer batch as an epoxidation catalyst indicated that a high-valent manganese-oxo species can be formed, although it is probably short-lived. This is also suggested by EPR studies of the species formed by electrochemical oxidation of the complex. Upon one-electron oxidation, a manganese(IV) species was formed, which was at least partly converted to another species containing a phenoxy radical.

机译：描述了标题三酚酸酯配体的合成和表征。从其与锰（III）的反应中分离出三种配合物。晶体结构显示一种五配位单体和两种相似的二聚体，具有不同的结晶溶剂。在二聚体中，金属离子是六配位的，并通过两个酚盐的桥连而连接。电化学和EPR光谱的结合表明，在乙腈中，分离出的批次完全相同且主要是单体，表明单核络合物与二聚体或更高核性的络合物处于平衡状态，这两种检测均表明通过电喷雾电离质谱（ESI-MS）分析三聚体和四聚体。单体批料作为环氧化催化剂的成功使用表明，尽管可能寿命很短，但仍可以形成高价的锰-氧代物质。 EPR研究也对复合物的电化学氧化形成的物质提出了建议。在单电子氧化后，形成了锰（IV）物种，该锰（IV）物种至少部分转化为另一个含有苯氧基的物种。

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《Chemistry: A European journal》 |2002年第16期|共12页
作者
Heimo Schmitt; Reiner Lomoth; Ann Magnuson; Jonathan Park; Jacob Fryxelius; Mikael Kritikos; Jerker Martensson; Leif Hammarstrom; Licheng Sun; Bjorn Akermark;
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正文语种 eng
中图分类化学;应用化学;
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EPR spectroscopy; manganese; redox chemistry; structure elucidation;

机译：EPR光谱;锰;氧化还原化学;结构阐明;

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1. Synthesis, Redox Properties, and EPR Spectroscopy of Manganese(III) Complexes of the Ligand N,N-Bis(2-hydroxybenzyl)-N'-2-hydroxybenzylidene-1,2-diaminoethane: Formation of Mononuclear, Dinuclear, and Even Higher Nuclearity Complexes [J] . Heimo Schmitt, Reiner Lomoth, Ann Magnuson, Chemistry: A European journal . 2002,第16期

机译：N，N-双（2-羟基苄基）-N'-2-羟基苄叉基-1,2-二氨基乙烷配体的锰（III）配合物的合成，氧化还原性质和EPR光谱：单核，双核甚至更高价的形成核复合体
2. New dinuclear cobalt (II, III) and tetranuclear manganese (III) complexes assembled by a polydentate Schiff-base ligand: synthesis, structure and magnetic properties [J] . Wanxia Zhu, Sheng Zhang, Chengmei Cui Inorganic Chemistry Communications . 2014,第Null期

机译：由多齿席夫碱配体组装的新型双核钴（II，III）和四核锰（III）配合物：合成，结构和磁性
3. Synthesis,spectroscopy and redox properties of mononuclear manganese(II) and manganese(IV) complexes with N-(aryl)-pyridine-2-aIdimine (L) and its amide derivatives.X-ray structural characterization of [Mn(MeL)_2(NCS)_2] (MeL = N-(4-methylphenyl)-pyr [J] . Kamala Mitra, Subhendu Biswas, Shyamal Kumar Chattopadhyay, Transition Metal Chemistry . 2005,第2期

机译：单核锰（II）和锰（IV）与N-（芳基）-吡啶-2-二亚胺（L）及其酰胺衍生物的配合物的合成，光谱学和氧化还原性质。[Mn（MeL）_2 （NCS）_2]（MeL = N-（4-甲基苯基）-pyr
4. Thermostability and luminescence properties of mononuclear Eu(III) complexes with aryl-extended diketonate ligands [C] . Toru Koizuka, Masanori Yamamoto, Yuichi Kitagawa 日本化学会春季年会講演予稿集 . 2018

机译：单核EU（III）配合物的热稳定性和发光性能与芳基延伸的二酮配体
5. The synthesis and characterization of mononuclear manganese(II), dinuclear manganese(III) and copper(II) complexes. [D] . Yisgedu, Teshome Beyene. 2001

机译：单核锰（II），双核锰（III）和铜（II）配合物的合成与表征。
6. Reactivity of uranium(iii) with H2E (E = S Se Te): synthesis of a series of mononuclear and dinuclear uranium(iv) hydrochalcogenido complexes [O] . Sebastian M. Franke, Michael W. Rosenzweig, Frank W. Heinemann, 2015

机译：铀（iii）与H2E（E = SSeTe）的反应性：合成一系列单核和双核铀（iv）硫代硫属化合物
7. Correction: Substituents drive ligand rearrangements, giving dinuclear rather than mononuclear complexes, and tune CoII/III redox potential [O] . Fabrice N. H. Karabulut, Humphrey L. C. Feltham, Sally Brooker 2019

机译：校正：取代基驱动配体重排，给予正核而不是单核复合物，并调整COII / III氧化还原电位
8. Synthesis, Structure, and Magnetic and Moessbauer Properties of Mononuclear and Asymmetric, Oxo-Bridged Trinuclear Iron(III) Complexes of a New Polyimidazole Ligand [R] . Gorun, S. M., Papaefthymiou, G. C., Frankel, R. B., 1987

机译：新型聚咪唑配体的单核和不对称，桥联三核铁（III）配合物的合成，结构，磁性和穆斯堡尔性质

Synthesis, Redox Properties, and EPR Spectroscopy of Manganese(III) Complexes of the Ligand N,N-Bis(2-hydroxybenzyl)-N'-2-hydroxybenzylidene-1,2-diaminoethane: Formation of Mononuclear, Dinuclear, and Even Higher Nuclearity Complexes

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