Question 18.c of 20 Aldehydes and ketones are common carbonyl functional groups. Identify the structures and provide names of these molecules. Provide a systematic name for this structure. H sa

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### Question 18.c of 20

#### Aldehydes and Ketones

Aldehydes and ketones are common carbonyl functional groups. Identify the structures and provide names of these molecules.

#### Task

Provide a systematic name for the following structure:

**Molecular Structure:**

- The image contains a molecular structure with a carbon chain and a carbonyl functional group (C=O) attached to one end of the chain.
- The structure has a total of five carbon atoms in a straight chain with a branched ethyl group attached to the fourth carbon. Specifically:
  - The first carbon is double-bonded to an oxygen atom (carbonyl group) and bonded to a hydrogen atom.
  - The second carbon in the chain is bonded to two hydrogen atoms.
  - The third carbon is bonded to two hydrogen atoms.
  - The fourth carbon is bonded to a hydrogen atom and an ethyl group (two-carbon chain).
  - The fifth carbon at the end of the chain bonded to three hydrogen atoms.

#### Interactive Naming Options:

- POSITIONS: 5-, 1-, 4-, 6-, 3-, 2-
- PREFIXES: cyclo, tert-, di, sec-, n-, tri
- ROOTS: hex, eth, but

Below the molecular structure, there are interactive buttons for selecting positions, prefixes, and roots to help systematically name the molecule.

#### Note:

The correct systematic name for the structure, adhering to IUPAC nomenclature guidelines, will help ensure clear communication and understanding in the field of organic chemistry.

---

**Example for Educational Context:**

This task provides practice with identifying and naming aldehydes and ketones, essential skills in organic chemistry. By systematically naming the molecular structure provided, students reinforce their understanding of carbonyl functional groups and IUPAC nomenclature rules.
Transcribed Image Text:### Question 18.c of 20 #### Aldehydes and Ketones Aldehydes and ketones are common carbonyl functional groups. Identify the structures and provide names of these molecules. #### Task Provide a systematic name for the following structure: **Molecular Structure:** - The image contains a molecular structure with a carbon chain and a carbonyl functional group (C=O) attached to one end of the chain. - The structure has a total of five carbon atoms in a straight chain with a branched ethyl group attached to the fourth carbon. Specifically: - The first carbon is double-bonded to an oxygen atom (carbonyl group) and bonded to a hydrogen atom. - The second carbon in the chain is bonded to two hydrogen atoms. - The third carbon is bonded to two hydrogen atoms. - The fourth carbon is bonded to a hydrogen atom and an ethyl group (two-carbon chain). - The fifth carbon at the end of the chain bonded to three hydrogen atoms. #### Interactive Naming Options: - POSITIONS: 5-, 1-, 4-, 6-, 3-, 2- - PREFIXES: cyclo, tert-, di, sec-, n-, tri - ROOTS: hex, eth, but Below the molecular structure, there are interactive buttons for selecting positions, prefixes, and roots to help systematically name the molecule. #### Note: The correct systematic name for the structure, adhering to IUPAC nomenclature guidelines, will help ensure clear communication and understanding in the field of organic chemistry. --- **Example for Educational Context:** This task provides practice with identifying and naming aldehydes and ketones, essential skills in organic chemistry. By systematically naming the molecular structure provided, students reinforce their understanding of carbonyl functional groups and IUPAC nomenclature rules.
### Formation of Acetals and Ketals

**Question 15.a of 20**

Aldehydes and ketones can react with alcohols to form acetals and hemiacetals.

**Question: Choose the molecule(s) with an acetal or ketal group.**

**Molecular Structures:**
- Molecule I
- Molecule II
- Molecule III
- Molecule IV
- Molecule V

**Options:**
- A) I
- B) II
- C) III
- D) IV
- E) V

**Explanation of Molecular Structures:**

Each molecule is depicted with various functional groups. The task is to identify which of these molecules contain either an acetal or ketal group.

- **Molecule I:** Features an ether functional group (R-O-R').
- **Molecule II:** Also contains an ether functional group.
- **Molecule III:** Shows a hydroxyl group (-OH) attached to the carbon chain.
- **Molecule IV:** Contains an ether functional group.
- **Molecule V:** Displays a characteristic acetal group with a central carbon bonded to two -OR groups.

When considering the reaction of aldehydes or ketones with alcohols, it's important to remember that:
- **Acetals** form when aldehydes react with alcohols.
- **Ketals** form when ketones react with alcohols.

These transformations typically result in a structure where a single carbon is bonded to two oxygen atoms (both bearing alkyl groups).

**Answer:**
To find the molecule(s) carrying an acetal or ketal group, look for the structures where a central carbon atom is bonded to two -OR groups.

The correct answer is:

- **E) V** – Molecule V contains an acetal or ketal group.
Transcribed Image Text:### Formation of Acetals and Ketals **Question 15.a of 20** Aldehydes and ketones can react with alcohols to form acetals and hemiacetals. **Question: Choose the molecule(s) with an acetal or ketal group.** **Molecular Structures:** - Molecule I - Molecule II - Molecule III - Molecule IV - Molecule V **Options:** - A) I - B) II - C) III - D) IV - E) V **Explanation of Molecular Structures:** Each molecule is depicted with various functional groups. The task is to identify which of these molecules contain either an acetal or ketal group. - **Molecule I:** Features an ether functional group (R-O-R'). - **Molecule II:** Also contains an ether functional group. - **Molecule III:** Shows a hydroxyl group (-OH) attached to the carbon chain. - **Molecule IV:** Contains an ether functional group. - **Molecule V:** Displays a characteristic acetal group with a central carbon bonded to two -OR groups. When considering the reaction of aldehydes or ketones with alcohols, it's important to remember that: - **Acetals** form when aldehydes react with alcohols. - **Ketals** form when ketones react with alcohols. These transformations typically result in a structure where a single carbon is bonded to two oxygen atoms (both bearing alkyl groups). **Answer:** To find the molecule(s) carrying an acetal or ketal group, look for the structures where a central carbon atom is bonded to two -OR groups. The correct answer is: - **E) V** – Molecule V contains an acetal or ketal group.
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