Nonequilibrium Nuclear Spin States of Ethylene during Acetylene Hydrogenation with Parahydrogen over Immobilized Iridium Complexes

IF 1.1 4区化学 Q4 CHEMISTRY, PHYSICAL

Doklady Physical Chemistry Pub Date : 2023-12-25 DOI:10.1134/s0012501623600237

I. V. Skovpin, S. V. Sviyazov, D. B. Burueva, L. M. Kovtunova, A. V. Nartova, R. I. Kvon, V. I. Bukhtiyarov, I. V. Koptyug

引用次数: 0

Abstract

Immobilized rhodium and iridium complexes have been prepared and characterized by X-ray photoelectron spectroscopy. For the first time, hyperpolarized ¹³C-ethylene was detected directly in the gas phase during acetylene hydrogenation with parahydrogen over immobilized iridium complexes. The line shape of polarized ¹³С‑ethylene unambiguously indicates that the hydrogen addition to the triple bond of acetylene over immobilized iridium complexes proceeds stereoselectively via syn-addition. It has been shown that the selective acetylene hydrogenation with parahydrogen over immobilized iridium complexes is an efficient chemical method for enriching the nuclear spin isomers of ethylene.

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固定化铱络合物在乙炔与对氢氢化过程中乙烯的非平衡核自旋态

摘要制备了固定化铑和铱络合物，并通过 X 射线光电子能谱进行了表征。在固定化铱络合物上用对氢氢化乙炔的过程中，首次在气相中直接检测到了超极化 13C-乙烯。极化 13С-乙烯的线形明确表明，固定化铱络合物上乙炔三键的氢加成是通过同步加成立体选择性进行的。研究表明，在固定化铱络合物上用对氢选择性地进行乙炔加氢是一种富集乙烯核自旋异构体的有效化学方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Doklady Physical Chemistry 化学-物理化学

CiteScore

1.50

自引率

0.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Doklady Physical Chemistry is a monthly journal containing English translations of current Russian research in physical chemistry from the Physical Chemistry sections of the Doklady Akademii Nauk (Proceedings of the Russian Academy of Sciences). The journal publishes the most significant new research in physical chemistry being done in Russia, thus ensuring its scientific priority. Doklady Physical Chemistry presents short preliminary accounts of the application of the state-of-the-art physical chemistry ideas and methods to the study of organic and inorganic compounds and macromolecules; polymeric, inorganic and composite materials as well as corresponding processes. The journal is intended for scientists in all fields of chemistry and in interdisciplinary sciences.