Why Does Proline Not Give a Positive Test with Ninhydrin

question 23

Multiple Choice

Why does proline not give a positive test with ninhydrin?

• A) The secondary amine of proline is too weak a nucleophile to add to ninhydrin.
• B) The of the ammonium in proline (10.6) is too high to react with ninhydrin.
• C) Hydrolysis of the second imine in the reaction mechanism cannot occur with proline.
• D) The first imine cannot form in the reaction between proline and ninhydrin.
• E) The second imine formed by decarboxylation in the mechanism is too unstable to form.

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Definitions:

Marginal Returns

denotes the additional output obtained by adding one more unit of a specific input, while keeping other inputs constant.

Diseconomies of Scale

The scenario where costs start increasing as a company or project becomes too large, leading to inefficiency.

Bureaucratic

Relating to a system of government in which most of the important decisions are made by state officials rather than by elected representatives.

Large Management

Refers to the administration and execution of strategic objectives within large organizations, involving complex structures and substantial resource allocation.