Chemistry Letters
Online ISSN : 1348-0715
Print ISSN : 0366-7022
最新号
選択された号の論文の27件中1~27を表示しています
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  • Sangeeta Yadav, Rajesh Deka, Harkesh B. Singh
    2019 年 48 巻 2 号 p. 65-79
    発行日: 2019/02/05
    公開日: 2019/02/05
    ジャーナル 認証あり

    Selones, since their first report in 1963, have attracted significant interest with respect to their bonding, structure and more importantly as an ancillary ligand for complexation with various metals. Starting as an analogue of N-heterocyclic carbene (NHC), selones are considered as promising molecules in chemistry with numerous applications in various important processes. Herein, a brief overview of selone, its genesis and relevance in contemporary chemistry is given, particularly focusing on its syntheses, reactivity and applications.

    Selones, since after its first report in 1963, have attracted significant interest with respect to their bonding, structure and more importantly as an ancillary ligand for complexion with various metals. Starting as an analogue of N-heterocyclic carbene (NHC), selones are considered as promising molecules in chemistry with numerous applications in various important processes. Herein, a brief overview of selone; its genesis and relevance in contemporary chemistry is given, particularly, focusing on its syntheses, reactivity, and applications. Fullsize Image
     
  • Hyeri Jeon, Seungwoo Hong
    2019 年 48 巻 2 号 p. 80-85
    発行日: 2019/02/05
    公開日: 2019/02/05
    ジャーナル 認証あり

    The O–O bond cleavage of peroxide ligands such as hydroperoxide and alkylperoxide within metalloenzymes has been extensively investigated because this process constitutes the key step of dioxygen activation and cellular respiration in all forms of aerobic organisms. Herein, we have provided mechanistic insights into the O–O bond cleavage of iron-(hydro/alkyl)peroxo complexes that was promoted by endogenous and exogenous factors such as spin-state, axial ligand, and electron donors. It has been shown that these factors can effectively direct the O–O bond cleaving pathways (e.g., Fe–O bond cleavage vs O–O bond cleavage or homolysis vs heterolysis). These results support that the peroxide bond cleavage process might proceed via diverse pathways under biological reaction conditions.

    Understanding the mechanistic pathways for the formation of high-valent metaloxo intermediates has been of critical subjects in bioinorganic research because they have been proposed as key intermediates in dioxygen activation paradigm of O2-activating enzymes. In this review, we discuss the peroxide bond cleavage processes of iron-(hydro/alkyl)peroxo complexes induced by endogenous and exogenous factors. Fullsize Image
     
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