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  • 03월 02일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Synthesis, Characterization, and Reactivity Studies of Cobalt(III)-Oxygen Complexes Bearing a Macrocyclic TMC Ligand

등록일
2012년 2월 9일 20시 51분 00초
접수번호
0117
발표코드
INOR.P-132 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
4월 25일 (수요일) 18:00~21:00
발표형식
포스터
발표분야
무기화학
저자 및
공동저자
김도연, 조재흥1, 남원우2
이화여자대학교 바이오융합과학과, Korea
1이화여자대학교 나노과학부, Korea
2이화여자대학교 화학과, Korea

Mononuclear metal-dioxygen adducts such as metal-superoxo and peroxo species are generated as key intermediates in the catalytic cycles of dioxygen activation by metalloenzymes and their model complexes have been characterized and investigated in electrophilic and nucleophilic reactions. Recently, we reported that the synthesis and structural and spectroscopic characterization of side-on cobalt(III)-peroxo complexes with 12- and 13-membered macrocyclic ligands which show the O2-transfer reactivity. Herein, we have shown the synthesis, spectroscopic characterization, and reactivity of cobalt(III)-peroxo complex, [CoIII(15-TMC)(O2)]+ (2) (15-TMC = 1,4,8,12-tetramethyl-1,4,8,12-tetraazacyclopentadecane), obtained by the reaction of [CoII(15-TMC)(CH3CN)2]2+ (1) with ten equiv. of H2O2 in the presence of five equiv. of triethylamine (Et3N) in CH3CN at 0 °C . In addition, 2 gradually decomposes, leading to aliphatic hydroxylation of the ligand side arm at its methyl position to give [CoIII(15-TMC-O)(CH3CN)]2+ (3) (15-TMC-O = (4,8,12-trimethyl-1,4,8,12-tetraazacyclopentadecan-1-yl)methanolate), which was confirmed by UV-vis, ESI-MS and X-ray analysis.


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