Adding the right (or left) twist to tris-chelate complexes - coordination chemistry of chiral oxazolylphenolates with M~(3+) ions (M = Al or lanthanide)

Helen C. Aspinall; John Bacsa; Oliver D. BeckinghamEdward G. B. EdenNicholas GreevesMatthew D. HobbsFrances PotjewydMarc SchmidtmannChristopher D. Thomas

首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Adding the right (or left) twist to tris-chelate complexes - coordination chemistry of chiral oxazolylphenolates with M~(3+) ions (M = Al or lanthanide)

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Adding the right (or left) twist to tris-chelate complexes - coordination chemistry of chiral oxazolylphenolates with M~(3+) ions (M = Al or lanthanide)

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A series of homoleptic tris-chelate complexes ML_3 (M = Al or rare earth; L = chiral or achiral oxazolyl phenolate or -naphtholate) is reported. In all cases, complexes crystallize as mer-isomers and complete diastereoselectivity is observed on crystallization of the complexes: ML_3 crystallize with Λ-helicity at the metal where L = (S)-oxazolylphenolate. Complexes have been characterized in solution by NMR spectroscopy, demonstrating rapid ligand exchange at ambient temperature for rare earth complexes, and slow exchange on the NMR timescale for complexes of Al; in all cases the mer-isomer is observed exclusively. Crystal structures are reported for YL_3_2 (L = (S)-2-(4-isopropyl-4,5-dihydrooxazol-2-yl)- phenolate), mer-YbL_3 (L = (S)-2-(4-isopropyl-4,5-dihydrooxazol-2-yl)-6-methylphenolate) and mer-AlL_3 (L = (S)-2-(4-isopropyl-4,5-dihydrooxazol-2-yl)-6-methylphenolate, L = (S)-2-(4-isopropyl-4,5-dihydrooxazol- 2-yl)-6-cyanophenolate), L = (S)-1-(4-isopropyl-4,5-dihydrooxazol-2-yl)naphthalen-2-olate, L = 1-(4,4- dimethyl-4,5-dihydrooxazol-2-yl)naphthalen-2-olate).

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《Dalton transactions: An international journal of inorganic chemistry 》 |2014年第3期| 1434-1442| 共9页
作者
Helen C. Aspinall; John Bacsa; Oliver D. BeckinghamEdward G. B. EdenNicholas GreevesMatthew D. HobbsFrances PotjewydMarc SchmidtmannChristopher D. Thomas;
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Department of Chemistry, University of Liverpool, Liverpool, L69 7ZD, UK;

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原文格式 PDF
正文语种英语
中图分类化学 ; 无机化学 ;
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crystallization; crystallize; Adding;

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Adding the right (or left) twist to tris-chelate complexes - coordination chemistry of chiral oxazolylphenolates with M~(3+) ions (M = Al or lanthanide)

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