Consider a sample that is a mixture composed of biphenyl, benzoic acid, and benzyl alcohol. The sample is spotted on a TLC plate and developed in a dichloromethane– cyclohexane solvent mixture. Predict the relative Rf values for the three components in the sample. Hint: See Table . Table 19.3 Elution sequence for compoundsHydrocarbonsFastest (will elute with nonpolar solvent)OlefinsEthersHalocarbonsAromaticsKetonesOrder of elutionAldehydesEstersAlcoholsAminesAcids, strong basesSlowest (need a polar solvent)

Answered: Table 19.3 Elution sequence for…

Introductory Chemistry: An Active Learning Approach

6th Edition

ISBN:9781305079250

Author:Mark S. Cracolice, Ed Peters

Publisher:Mark S. Cracolice, Ed Peters

Chapter22: Biochemistry

Section: Chapter Questions

Problem 68E

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Consider a sample that is a mixture composed of biphenyl, benzoic acid, and benzyl alcohol. The sample is spotted on a TLC plate and developed in a dichloromethane– cyclohexane solvent mixture. Predict the relative R_f values for the three components in the sample. Hint: See Table .

Table 19.3 Elution sequence for compounds
Hydrocarbons
Fastest (will elute with nonpolar solvent)
Olefins
Ethers
Halocarbons
Aromatics
Ketones
Order of elution
Aldehydes
Esters
Alcohols
Amines
Acids, strong bases
Slowest (need a polar solvent)

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Consider a sample that is a mixture composed of biphenyl, benzoic acid, and benzyl alcohol. The sample is spotted on a TLC plate and developed in a dichloromethane-cyclohexane solvent mixture.

The relative R_f values for the three components in the sample have to be predicted.

The formula for the calculating relative R_f value has to be given below,

$R_{f} = \frac{Distance travelled by the compound}{Distance travelled by the solvent}$

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