2311 lec 5 - Liquid Column Chromatography Separation of...

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Liquid Column Chromatography Separation of Ferrocene and Acetylferrocene Organometallic compounds mpt 172-174 o C mpt 81-83 o C Brightly colored compounds Fe Fe CH 3 O Ferrocene Acetylferrocene H H H H H Cyclopentadienylanion
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Example of another organometallic compound
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Goals Learn the technique of column chromatography to separate a mixture of ferrocene and acetylferrocene Determine quantity (mass) of each compound in original sample Analyze purity of fractions by melting point Analyze efficiency of separation and purity of fractions by thin-layer chromatography
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Chr oma togr aphy Separation based on the distribution between two phases Solid and Liquid (column, TLC, paper) Liquid and Liquid (HPLC) Gas and Liquid (GC)
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Principles One phase is stationary Examples: solid adsorbent (silica gel and alumina) Examples: liquids (high MW silicone oils) One phase is moving or mobile Examples: liquids (organic solvents are elution solvents) Examples: gas (helium, argon) All must be inert (not react with) to the solutes/compounds being separated
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Technique 17 Separation based on adsorptivity and solubility Stationary phase is silica gel (SiO
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2311 lec 5 - Liquid Column Chromatography Separation of...

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