Discussion and Conclusion

Discussion and Conclusion - D iscussion and Conclusion...

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Discussion and Conclusion: Column Function: The column is used to separate Fluorene from Fluorenone in a bench-top chromatography. The polarity of the materials used and of the compounds to be separated plays an important role in this experiment. Silica gel (the stationary phase) is more polar than hexane (the moving phase). At the same time, since Fluorenone belongs to the Ketone family, the extra double bond with oxygen makes it more polar than Fluorene. Therefore, when the non-polar hexane gets poured into the column, Fluourene gets eluted first due to the match in polarity with hexane while the polar Fluourenone sticks to the polar silica gel. When the mixture of ether/hexane gets poured into the column, the yellow flourenone gets eluted since ether is slightly more polar than silica gel and so polar flourenone tends to stick with it. TLC function: Thin-layer chromatography is used in this experiment to check the purity of the fluorene and fluorenone separated by column chromatography in the first part. Here, two aluminium plates (pre-coated with polar silica gel) were used and drops
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This note was uploaded on 09/09/2010 for the course CHEM CHEM 2204 taught by Professor Peterbuist during the Summer '10 term at Carleton.

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Discussion and Conclusion - D iscussion and Conclusion...

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