A mechanism for the formation of a purple-colored compound from ninhydrin has to be proposed. Concept introduction: Ninhydrin reacts with amino acid to form a purple-colored compound. The reaction is thus used to identify amines. It is a test given by all amino acids. Ninhydrin acts as an oxidizing agent and the product formed is a reduced form of ninhydrin, carbon dioxide, and an aldehyde .

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Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 18, Problem 76P

Interpretation Introduction

Interpretation: A mechanism for the formation of a purple-colored compound from ninhydrin has to be proposed.

Concept introduction: Ninhydrin reacts with amino acid to form a purple-colored compound. The reaction is thus used to identify amines. It is a test given by all amino acids. Ninhydrin acts as an oxidizing agent and the product formed is a reduced form of ninhydrin, carbon dioxide, and an aldehyde.

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2) (4 pt) After the reaction was completed, the student collected the following data. Crude product data is the data collected after the reaction is finished, but before the product is purified. "Pure" product data is the data collected after attempted purification using recrystallization. Student B's data: Crude product data "Pure" product data after recrystallization Crude mass: 0.93 g grey solid Crude mp: 96-106 °C Crude % yield: Pure mass: 0.39 g white solid Pure mp: 111-113 °C Pure % yield: a) Calculate the crude and pure percent yields for the student's reaction. b) Summarize what is indicated by the crude and pure melting points.

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Answer 2

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Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 18, Problem 76P

Interpretation Introduction

Interpretation: A mechanism for the formation of a purple-colored compound from ninhydrin has to be proposed.

Concept introduction: Ninhydrin reacts with amino acid to form a purple-colored compound. The reaction is thus used to identify amines. It is a test given by all amino acids. Ninhydrin acts as an oxidizing agent and the product formed is a reduced form of ninhydrin, carbon dioxide, and an aldehyde.

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Answer 3

Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 18, Problem 76P

Interpretation Introduction

Interpretation: A mechanism for the formation of a purple-colored compound from ninhydrin has to be proposed.

Concept introduction: Ninhydrin reacts with amino acid to form a purple-colored compound. The reaction is thus used to identify amines. It is a test given by all amino acids. Ninhydrin acts as an oxidizing agent and the product formed is a reduced form of ninhydrin, carbon dioxide, and an aldehyde.

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 4

Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 18, Problem 76P

Interpretation Introduction