1994年
OPTICAL ENRICHMENT OF CHIRAL RACEMIC CRYSTALS ON EXPOSURE TO VISIBLE-LIGHT
MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS
- ,
- ,
- 巻
- 242
- 号
- 開始ページ
- 103
- 終了ページ
- 108
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- 出版者・発行元
- GORDON BREACH SCI PUBL LTD
The racemic complex of (1-cyanoethyl)(piperidine)cobalozime crystallizes in an isomorphous structure to its chiral one. In either crystal one of the two crystallographically independent molecules is gradually inverted to have the opposite configuration on exposure to visible light retaining the single crystal form. This brings about optical enrichment for the crystal of racemic complex. The final structures produced by the complete irradiation for the chiral and racemic crystals are converged to the same one. The ratio of the R and S configuration of the partly inverted molecule in the final structure is not 50:50 but 60:40, which is well explained by the shape of the reaction cavities for the cyanoethyl group before and after the partial inversion. Another racemic complex crystal with pyrrolidine instead of piperidine seems to exhibit a similar optical enrichment.
- リンク情報
- ID情報
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- ISSN : 1058-725X
- Web of Science ID : WOS:A1994PU40200010