Thermally stable manganese(III) peroxido complexes with hindered N3 tripodal ligands: Structures and their physicochemical properties

被引：5

作者：

Fujisawa, Kiyoshi ^{[1
]}

Sakuma, Syuhei ^{[1
]}

Ikarugi, Riko ^{[1
]}

Jose, Anex ^{[2
]}

Solomon, Edward I. ^{[2
,3
]}

机构：

[1] Ibaraki Univ, Dept Chem, Mito, Ibaraki 3108512, Japan

[2] Stanford Univ, Dept Chem, Stanford, CA 94305 USA

[3] Stanford Univ, SLAC, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA

来源：

JOURNAL OF INORGANIC BIOCHEMISTRY | 2021年 / 225卷

关键词：

Mononuclear manganese(II) complexes; Manganese(III) complexes; Peroxido complexes; X-ray crystallography; Infrared spectroscopy; DFT calculations; I RIBONUCLEOTIDE REDUCTASES; SUPEROXIDE DISMUTASES; ELECTRONIC-STRUCTURE; METAL-COMPLEXES; BOND OXIDATION; WATER; IRON; REACTIVITY; CRYSTAL; BEARING;

D O I：

10.1016/j.jinorgbio.2021.111597

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Mononuclear manganese(III) peroxido complexes are candidates for the reaction intermediates in manganese containing proteins, such as manganese superoxide dismutase (Mn-SOD) etc. In this study, manganese(III) peroxido complexes [Mn(O-2)(L3)] and [Mn(O-2)(L10)] ligated by anionic N3 type ligands with sterically hindered substituents, hydrotris(3-tertiary butyl-5-isopropyl-1-pyrazolyl)borate (L3(-)) and hydrotris(3-adamantyl-5-isopropyl-1-pyrazolyl)borate (L10(-)), respectively, were structurally characterized. These complexes are the first examples of structurally characterized five-coordinate manganese(III) peroxido complexes. Their characteristic nu(O-O) and nu(Mn-O) stretchings were determined by using (H2O2)-O-18 for the first time. Theoretical calculations were performed to obtain further insight into their structural parameters. The decomposed products were obtained as [{Mn-III(mu-O)(L3)}(2)Mn-IV] and [Mn-III(OH){L10(O)}] from [Mn(O-2)(L3)] and [Mn(O-2)(L10)], respectively.

引用

页数：9

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