Structural, electrochemical and oxygen atom transfer properties of a molybdenum selenoether complex [Mo2O4(OC3H 6SeC3H6O)2] and its thioether analogue [Mo2O4(OC3H6SC 3H6O)2]

Xiaoli Ma, Carola Schulzke*, Hans Georg Schmidt, Mathias Noltemeyer

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

20 引用 (Scopus)

摘要

The first crystallographically characterized molybdenum(vi) selenoether complex [Mo2O4(OC3H6SeC 3H6O)2] and its thioether analogue [Mo 2O4(OC3H6SC3H 6O)2] were synthesised. Their structural, electrochemical and oxygen atom transfer properties are compared. This is relevant for the molybdenum cofactors of the DMSO reductase family where the coordination of the active site metal occurs through O (serine/aspartate), S (cysteine) or Se (selenocysteine). Both structures are almost identical except for those parameters that are directly derived from the different sizes of the varied ligand atoms (Se and S). No trans influence was observed. The metal centered redox process (MoV↔MoVI) is at slightly lower voltage for the sulfur than for the selenium complex. The selenium compound catalyses the oxygen atom transfer from DMSO to PPh3 by a different mechanism and at a higher rate than the sulfur compound, which is an indication that cysteine and selenocysteine might be used for a purpose in the different molybdenum and tungsten cofactors.

源语言英语
页(从-至)1773-1780
页数8
期刊Dalton Transactions
18
DOI
出版状态已出版 - 2007
已对外发布

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Ma, X., Schulzke, C., Schmidt, H. G., & Noltemeyer, M. (2007). Structural, electrochemical and oxygen atom transfer properties of a molybdenum selenoether complex [Mo2O4(OC3H 6SeC3H6O)2] and its thioether analogue [Mo2O4(OC3H6SC 3H6O)2]. Dalton Transactions, (18), 1773-1780. https://doi.org/10.1039/b617652f