Interpretation:
The reason for the use of silica gel columns with smaller particle sizes in chromatographic separation should be stated.
Concept introduction:
Liquid chromatography is used for purification of high boiling compounds. It is known as column chromatography. In liquid chromatography, column is packed by stationary phase. Usually, a solid adsorbent with a liquid coated on it is used as stationary phase. Often a pure liquid or solution of liquids composes the mobile phase. It is also called the elution solvent.
The elution solvent comes down the column under the influence of gravity. Selective interactions are responsible for separation of the sample among stationary and mobile phase. The sequence of elution of compounds from sample depends on the polarity of mobile and stationary phases.

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Chapter 19 Solutions
LABORATORY TECHNIQUES IN ORGANIC CHEMIS
- If a reaction occurs, what would be the major products? Please include a detailed explanation as well as a drawing showing how the reaction occurs and what the final product is.arrow_forwardWould the following organic synthesis occur in one step? Add any missing products, required catalysts, inorganic reagents, and other important conditions. Please include a detailed explanation and drawings showing how the reaction may occur in one step.arrow_forward(a) Sketch the 'H NMR of the following chemical including the approximate chemical shifts, the multiplicity (splitting) of all signals and the integration (b) How many signals would you expect in the 13C NMR? CH3arrow_forward
- Draw the Show the major and minor product(s) for the following reaction mechanisms for both reactions and show all resonance structures for any Explain why the major product is favoured? intermediates H-Brarrow_forwardChoose the right answerarrow_forward8. What is the major product of the following reaction? KMnO4 b a TOH OH OH C d OH "OH HO OH OHarrow_forward
- Choose the right answerarrow_forward3. Draw ALL THE POSSBILE PRODUCTS AND THE MECHANISMS WITH ALL RESONANCE STRUCTURES. Explain using the resonance structures why the major product(s) are formed over the minor product(s). H₂SO4, HONO CHarrow_forward7. Provide the product(s), starting material(s) and/or condition(s) required for the No mechanisms required. below reaction HO + H-I CI FO Br2, FeBr3 O I-Oarrow_forward
- 6. Design the most efficient synthesis of the following product starting from phenot Provide the reaction conditions for each step (more than one step is required) and explain the selectivity of each reaction. NO MECHANISMS ARE REQUIRED. OH step(s) CIarrow_forwardWhat is the skeletal structure of the product of the following organic reaction?arrow_forwardIf a reaction occurs, what would be the major products? Please include a detailed explanation as well as a drawing showing how the reaction occurs and what the final product is.arrow_forward
- Principles of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage LearningEBK A SMALL SCALE APPROACH TO ORGANIC LChemistryISBN:9781305446021Author:LampmanPublisher:CENGAGE LEARNING - CONSIGNMENT

