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제107회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Stable Structures of Diastereomers of Hetaryl LTAM Molecules Depending on EWD Substituent Group

등록일
2011년 1월 28일 14시 43분 44초
접수번호
0002
발표코드
Ⅱ-ORGN.P-203 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
목 <발표Ⅱ>
발표형식
포스터
발표분야
유기화학
저자 및
공동저자
마소영, 김도경1, 금삼록1
고려대학교 소재화학과, Korea
1고려대학교 소재화학과, Korea

The unequivocal solid-state structure and stereochemistry of the hetaryl leuco-TAM dye, 2,2’-(2-phenyl propane-1,3-diylidene) bis(1,3,3-trimethylindoline) derivatives were established using X-ray single crystal analysis. The X-ray crystal analysis showed that the ZE-isomers only formed stereoselectively, with a so-called “three bladed propeller” conformation, from the reaction of a Fischer base and benzaldehyde derivatives. However, the stability and steroselectivity are completely inversed in the formation of hetaryl LTAM derivatives, when the LTAM molecules contain an electron withdrawing groups such as p-NO2, p-(N), p-CHO, etc on the para position of the aryl group. In that situation, the EE-isomers unusually are formed mainly and later equilibriated to the mixture of EE, ZE and ZZ isomers. These EE isomers were stacked in a juxtaposition to form a dimer of a double dimer, adopting either a triclinic, with P-1, of monoclinic crystal system with a space group P21/n in the unit cell of the crystal.


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