Interpretation: The order of elution of a mixture of triphenylmethanol, biphenyl, benzoic acid, and methyl benzoate from an alumina column should be predicted.
Concept introduction: A separation technique used for the segregation of components of chemical mixture based on the difference between the adsorption of different components in stationary and mobile phase is called column chromatography.
It is used for purification or segregation of compounds. It consists of two phases namely:
1. Stationary phase (solid)
2. Mobile phase (generally liquid)
Silica gel is commonly used as the stationary phase.
Elution is the process of extraction of one component from another with the help of the solvent. Eluent is the carrier part of mobile phase. Eluate is the material that comes up through the chromatogram.
Answer to Problem 1Q
The order of elution of the compounds in the given mixture is,
Explanation of Solution
The structures of the given compounds are as follows:
Triphenylmethanol has
The order of polarity of the given compounds is as follows:
Biphenyl is the least polar and therefore it is eluted first, followed by methyl benzoate, triphenylmethanol, and benzoic acid.
So the order of elution of the mixture of the given compounds is as follows:
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Chapter 9 Solutions
Macroscale and Microscale Organic Experiments
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