Helical Structure and Optical Rotation of Two Conformers of L-(+)-2,3-O-Isopropylidene Threitol Phathalate

Chem. J. Chinese Universities ›› 2000, Vol. 21 ›› Issue (4): 552.

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Helical Structure and Optical Rotation of Two Conformers of L-(+)-2,3-O-Isopropylidene Threitol Phathalate

FENG Feng², ZHANG Hong³, HUANG Ji-Jun¹, CHEN Liang-Wei¹, ZHANG Yong-Mei¹, DENG Bing ¹

1. Departmentof Chemistry, Shanxi University, Taiyuan 030006, China;
2. Yanbei Teachers College, Datong 037000, China;
3. Shanxi Staff Medical College, Taiyuan 030012, China

Received:1999-04-12 Online:2000-04-24 Published:2000-04-24

Abstract

Abstract: In the state of crystal L (+)-2,3-Oisopropylidene threitol phathalate 1 exists in the form of two conformational isomer. Dealing with its structure and torsion angles we found and analyzed all of helical segments in the two conformational isomer with “the Judging Rule of Determining Rule of Identifying Rule of Helical Segments” and ω values. Although the two conformational isomers have opposite net helicities, we still come to the conclusion that the total net helicity of compound 1 was consistent with its direction of optical rotation.

Key words: Helical structure, Optical rotation, Conformation, L-(+)-2,3-O-Isopropylidene threitol phathalate

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FENG Feng, ZHANG Hong, HUANG Ji-Jun, CHEN Liang-Wei, ZHANG Yong-Mei, DENG Bing  . Helical Structure and Optical Rotation of Two Conformers of L-(+)-2,3-O-Isopropylidene Threitol Phathalate[J]. Chem. J. Chinese Universities, 2000, 21(4): 552.

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Helical Structure and Optical Rotation of Two Conformers of L-(+)-2,3-O-Isopropylidene Threitol Phathalate

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