Transformation of Small Molecules at the Five Coordinate Iron Center
소속 :
연사 : Prof. Yunho Lee(KAIST, Department of Chemistry)
일시 : 2011-09-15 17:00 ~
장소 : 25-1동 국제회의실
일 시 : 2011년 9월 15일, 오후 5:00
장 소 : 25-1동 국제회의실
-Abstract-
There has been a surge of interest in the chemistry of low-valent, redox-active complexes of the mid-to-late first – row transition metals in recent years. This interest has been in part motivated by a desire to generate species that feature uncommon metal-to-ligand multiply bonded species such as oxos, imides, carbynes and nitrides via partial or complete group transfer. Particular study of such species will be presented to show their respective roles in small-molecule transformations that include, dinitrogen reduction for Nitrogenase chemistry and CO reduction as a key step for Fisher-Tropsch synthesis. To test the validity of hypotheses concerning iron’s direct role in the stepwise reduction of N2 and CO, iron model systems are needed. Such systems can test the chemical compatibility of iron with various proposed intermediates, and the reactivity patterns of such species. A TBP (SiPR3)Fe-L scaffold (SiPR3 represents [Si(o-C6H4PR2)3–; R=PhandiPr) where the apical site is occupied by ligands such as N2, H2, CO, N2H4, NH3, N2R and COR will be described. The systems accommodating terminally bound both N2 and CO in the three formal oxidation states (iron(0), +1, and +2) and their functionalization will be illustrated.
장 소 : 25-1동 국제회의실
-Abstract-
There has been a surge of interest in the chemistry of low-valent, redox-active complexes of the mid-to-late first – row transition metals in recent years. This interest has been in part motivated by a desire to generate species that feature uncommon metal-to-ligand multiply bonded species such as oxos, imides, carbynes and nitrides via partial or complete group transfer. Particular study of such species will be presented to show their respective roles in small-molecule transformations that include, dinitrogen reduction for Nitrogenase chemistry and CO reduction as a key step for Fisher-Tropsch synthesis. To test the validity of hypotheses concerning iron’s direct role in the stepwise reduction of N2 and CO, iron model systems are needed. Such systems can test the chemical compatibility of iron with various proposed intermediates, and the reactivity patterns of such species. A TBP (SiPR3)Fe-L scaffold (SiPR3 represents [Si(o-C6H4PR2)3–; R=PhandiPr) where the apical site is occupied by ligands such as N2, H2, CO, N2H4, NH3, N2R and COR will be described. The systems accommodating terminally bound both N2 and CO in the three formal oxidation states (iron(0), +1, and +2) and their functionalization will be illustrated.
