HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
工学研究科  >
雑誌発表論文等  >

Pulse radiolysis studies of the reactions of bromine atoms and dimethyl sulfoxide-bromine atom complexes with alcohols

フルテキスト
RPC76-5.pdf434.72 kBPDF見る/開く
この文献へのリンクには次のURLを使用してください:http://hdl.handle.net/2115/22085

タイトル: Pulse radiolysis studies of the reactions of bromine atoms and dimethyl sulfoxide-bromine atom complexes with alcohols
著者: Sumiyoshi, Takashi 著作を一覧する
Fujiyoshi, Ryoko 著作を一覧する
Katagiri, Miho 著作を一覧する
Sawamura, Sadashi 著作を一覧する
キーワード: Pulse radiolysis
Rate constant
Br
DMSO–Br complex
Alcohol
発行日: 2007年 5月
出版者: Elsevier
誌名: Radiation Physics and Chemistry
巻: 76
号: 5
開始ページ: 779
終了ページ: 786
出版社 DOI: 10.1016/j.radphyschem.2006.04.011
抄録: Dimethylsulfoxide (DMSO)–Br complexes were generated by pulse radiolysis of DMSO/bromomethane mixtures and the formation mechanism and spectral characteristics of the formed complexes were investigated in detail. The rate constant for the reaction of bromine atoms with DMSO and the extinction coefficient of the complex were obtained to be 4.6×109 M−1 s−1 and 6300 M−1 cm−1 at the absorption maximum of 430 nm. Rate constants for the reaction of bromine atoms with a series of alcohols were determined in CBrCl3 solutions applying a competitive kinetic method using the DMSO–Br complex as the reference system. The obtained rate constants were 108 M−1 s−1, one or two orders larger than those reported for highly polar solvents. Rate constants of DMSO–Br complexes with alcohols were determined to be 107 M−1 s−1. A comparison of the reactivities of Br atoms and DMSO–Br complexes with those of chlorine atoms and chlorine atom complexes which are ascribed to hydrogen abstracting reactants strongly indicates that hydrogen abstraction from alcohols is not the rate determining step in the case of Br atoms and DMSO–Br complexes.
Relation (URI): http://www.sciencedirect.com/science/journal/0969806X
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/22085
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 住吉 孝

 

本サイトに関するご意見・お問い合わせは repo at lib.hokudai.ac.jp へお願いします。 - 北海道大学