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  • 02월 19일 10시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제121회 대한화학회 학술발표회, 총회 및 기기전시회 안내 A remarkably stable radical zwitterion derived from N-heterocyclic carbene nitric oxide

2018년 2월 7일 13시 20분 25초
INOR.P-145 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 19일 (목요일) 11:00~12:30
Inorganic Chemistry
저자 및
Youngsuk Kim, Eunsung Lee*
Department of Chemistry, Pohang University of Science and Technology, Korea

For the past few years, N-heterocyclic carbene (NHC) have been introduced to stabilize various organic radicals and radical ions, as a variety of previously inaccessible organic radicals have been successfully prepared and characterized with an aid of NHCs.[1] These radicals were successfully stabilized due to the π-accepting properties of NHCs that delocalize the spin density, as well as the steric protection of the bulky NHC substituents. Here we report the synthesis and characterization of a remarkably stable radical zwitterion A. It is notable that A shows remarkable stability toward air and moisture. For example, solution of A in wet technical-grade benzene showed no detectable decomposition over 12 days. In addition, A is stable even under chromatographic condition as shown in the clean TLC spot in Figure 1. Also, benzene solution of 2 was still EPR active even after the filtration through silica gel under air. With the help from the novel properties of NHCs, this work clearly shows a successful example of designing a stable radical. Possible applications of the stable radical A is currently under investigation. Reference [1] Kim, Y.; Kim, K.; Lee, E., Angew. Chem. Int. Ed. 2018, 57, 262-265.