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Nickel Complexes of Alanine Having a Preference for One Chiral Form over Another upon Crystallization
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  • Nickel Complexes of Alanine Having a Preference for One Chiral Form over Another upon Crystallization
  • Nickel Complexes of Alanine Having a Preference for One Chiral Form over Another upon Crystallization
저자명
Khatib. Awni,Aqra. Fathi
간행물명
Bulletin of the Korean Chemical Society
권/호정보
2009년|30권 9호|pp.2017-2020 (4 pages)
발행정보
대한화학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

Three complexes, [bis(L-, D- and DL-alaninato)(diaqua)]nickel(II) di-hydrate, were prepared and characterized by X-ray crystallography, gas chromatography, UV-Visible spectroscopy and isothermal calorimetry. Small deviations from the 50:50 distribution of the enantiomers assigned to chiral preferences of the ligands in the complexes were observed. The surprising and unexpected results indicate that complexing alanine with nickel(II) ion alters the racemization rates of D and L isomers of the amino acid. The precipitated complex due to change in pH resulted in preferential precipitation of one isomer with respect to the other. It has been observed that this alternation is ogmented by the long time span which would result in preferential protein forming from the L-isomer. Although the results are bizarre and perplexing, they are fascinating and sound scientifically.