final examination- quad 4

part b: short answers

1. write electron configuration of following ion. (a-2 marks)
$\text{sn}^{4+}$

2. for each of the following:
$\text{h}_3\text{o}^+$ $\text{po}_4^{3-}$
a) draw lewis dot diagrams along with its proper shape (a-3marks)
b) predict the polarity of both molecules. show your work. (t/i-2marks)

3. name the following organic compounds. identify the organic family. (c-8 marks)
a)
\
\begin{array}{c}
\text{ch}_2\text{ch}_2\text{ch}_2\text{ch}_3 \\
| \\
\text{ch}_3\text{ch}_2\text{ch}_2\text{ch}_2\text{c}-\text{o}-\text{ch}_2\text{ch}_2\text{ch}_3 \\
| \\
\text{ch}_2\text{ch}_2\text{ch}_2\text{ch}_3
\end{array}
\

b)
\
\begin{array}{c}
\text{o} \\
|| \\
\text{ch}_3\text{chch}_2\text{c}-\text{o}-\text{ch}_2-\text{ch}_2-\text{ch}_2-\text{ch}_2-\text{ch}_2-\text{ch}_3 \\
| \\
\text{ch}_2\text{ch}_3
\end{array}
\

c)
\
\begin{array}{cc}
\text{ch}_3 & \text{cooh} \\
| & | \\
\text{ch}_2-\text{ch}_2-\text{ch}_2-\text{ch}-\text{ch}- & \text{ch}-\text{ch}_2-\text{ch}_3 \\
| & \\
\text{ch}_2\text{ch}_3 &
\end{array}
\

d)
\
\begin{array}{c}
\text{o} \\
|| \\
\text{ch}_3\text{cchch}_2\text{ch}_2 \\
| \quad | \\
\text{ch}_3 \quad \text{ch}_3
\end{array}
\

e) $\text{ch}_3\text{chch}_2\text{ch}_2\text{chch}_2\text{ch}_2\text{ch}_3$ with $-\text{oh}$ attached to carbon 2 and $-\text{ch}_2\text{ch}_2\text{ch}_3$ attached to carbon 5.

f)
\
\begin{array}{c}
\text{o} \\
|| \\
\text{hcchch}_2\text{ch}_2 \\
| \quad | \\
\text{ch}_3 \quad \text{ch}_2\text{ch}_2\text{ch}_3
\end{array}
\

Question

final examination- quad 4

part b: short answers

1. write electron configuration of following ion. (a-2 marks)
$\text{sn}^{4+}$

2. for each of the following:
$\text{h}_3\text{o}^+$ $\text{po}_4^{3-}$
a) draw lewis dot diagrams along with its proper shape (a-3marks)
b) predict the polarity of both molecules. show your work. (t/i-2marks)

3. name the following organic compounds. identify the organic family. (c-8 marks)
a)
\
\begin{array}{c}
\text{ch}_2\text{ch}_2\text{ch}_2\text{ch}_3 \\
| \\
\text{ch}_3\text{ch}_2\text{ch}_2\text{ch}_2\text{c}-\text{o}-\text{ch}_2\text{ch}_2\text{ch}_3 \\
| \\
\text{ch}_2\text{ch}_2\text{ch}_2\text{ch}_3
\end{array}
\

b)
\
\begin{array}{c}
\text{o} \\
|| \\
\text{ch}_3\text{chch}_2\text{c}-\text{o}-\text{ch}_2-\text{ch}_2-\text{ch}_2-\text{ch}_2-\text{ch}_2-\text{ch}_3 \\
| \\
\text{ch}_2\text{ch}_3
\end{array}
\

c)
\
\begin{array}{cc}
\text{ch}_3 & \text{cooh} \\
| & | \\
\text{ch}_2-\text{ch}_2-\text{ch}_2-\text{ch}-\text{ch}- & \text{ch}-\text{ch}_2-\text{ch}_3 \\
| & \\
\text{ch}_2\text{ch}_3 &
\end{array}
\

d)
\
\begin{array}{c}
\text{o} \\
|| \\
\text{ch}_3\text{cchch}_2\text{ch}_2 \\
| \quad | \\
\text{ch}_3 \quad \text{ch}_3
\end{array}
\

e) $\text{ch}_3\text{chch}_2\text{ch}_2\text{chch}_2\text{ch}_2\text{ch}_3$ with $-\text{oh}$ attached to carbon 2 and $-\text{ch}_2\text{ch}_2\text{ch}_3$ attached to carbon 5.

f)
\
\begin{array}{c}
\text{o} \\
|| \\
\text{hcchch}_2\text{ch}_2 \\
| \quad | \\
\text{ch}_3 \quad \text{ch}_2\text{ch}_2\text{ch}_3
\end{array}
\

Accepted Answer

{ "quality": "clear", "question_count": 6, "skills_matched": [ "direct_cot", "explain_then_answer", "tutor" ], "needs_drawing": false, "concepts_used": [], "new_concepts": [ "IUPAC Nomenclature", "Organic Chemistry Families", "Functional Groups" ], "current_concepts": [ "IUPAC Nomenclature", "Organic Chemistry Families", "Ethers", "Esters", "Carboxylic Acids", "Ketones", "Alcohols", "Aldehydes" ] } ## Identify functional groups We analyze the main functional group in each molecule to determine its organic family. - **a)** Contains an oxygen atom single-bonded to two carbon groups: $\text{R-O-R'}$. This is an **ether**. - **b)** Contains a carbonyl group adjacent to an ether-like oxygen: $\text{R-C(=O)-O-R'}$. This is an **ester**. - **c)** Contains a carboxyl group: $\text{-COOH}$. This is a **carboxylic acid**. - **d)** Contains a carbonyl group bonded to two carbons: $\text{R-C(=O)-R'}$. This is a **ketone**. - **e)** Contains a hydroxyl group: $\text{-OH}$. This is an **alcohol**. - **f)** Contains a carbonyl group at the end of a chain: $\text{-CHO}$. This is an **aldehyde**. ## Name compound (a) - **Structure:** An oxygen atom connected to a propyl group on the right ($\text{-CH}_2\text{CH}_2\text{CH}_3$) and a highly branched carbon on the left. - **Left group analysis:** The central carbon is bonded to three butyl groups ($\text{-CH}_2\text{CH}_2\text{CH}_2\text{CH}_3$). - **IUPAC naming:** The longest continuous carbon chain containing the central carbon is 9 carbons (nonane). The central carbon is carbon-5. At carbon-5, we have a butyl group and a propoxy group ($\text{-O-CH}_2\text{CH}_2\text{CH}_3$). - **Name:** 5-butyl-5-propoxynonane. - **Family:** Ether. ## Name compound (b) - **Structure:** $\text{CH}_3\text{CH}(\text{CH}_2\text{CH}_3)\text{CH}_2\text{-C(=O)-O-CH}_2\text{CH}_2\text{CH}_2\text{CH}_2\text{CH}_2\text{CH}_3$ - **Alcohol part (right of O):** Hexyl group (6 carbons). - **Acid part (left of O, including carbonyl):** The carbonyl carbon is C1. The chain is $\text{C}^1\text{(=O)-C}^2\text{H}_2\text{-C}^3\text{H}(\text{CH}_2\text{CH}_3)\text{-C}^4\text{H}_3$. The longest chain starting from C1 is 5 carbons (pentanoate) with a methyl group at C3, or 4 carbons with an ethyl group at C3. The longest chain is 5 carbons: $\text{C}^1\text{-C}^2\text{-C}^3\text{-C}^4\text{-C}^5$ (where C4-C5 is the ethyl group $\text{-CH}_2\text{CH}_3$). Thus, it is a 3-methylpentanoate. - **Name:** hexyl 3-methylpentanoate. - **Family:** Ester. ## Name compound (c) - **Structure:** $\text{CH}_3\text{-CH}_2\text{-CH}_2\text{-CH}(\text{CH}_2\text{CH}_3)\text{-CH}(\text{COOH})\text{-CH}_2\text{-CH}_3$ - **IUPAC naming:** The carboxylic acid carbon ($\text{-COOH}$) is C1. The longest chain starting from C1 goes through the $\text{-CH}(\text{CH}_2\text{CH}_3)$ and then the propyl chain: $\text{C}^1\text{OOH - C}^2\text{H}(\text{CH}_2\text{CH}_3)\text{ - C}^3\text{H}(\text{CH}_2\text{CH}_3)\text{ - C}^4\text{H}_2\text{ - C}^5\text{H}_2\text{ - C}^6\text{H}_3$. This is a hexanoic acid. - **Substituents:** At C2 we have an ethyl group. At C3 we have an ethyl group. - **Name:** 2,3-diethylhexanoic acid. - **Family:** Carboxylic acid. ## Name compound (d) - **Structure:** $\text{CH}_3\text{-C(=O)-CH}(\text{CH}_3)\text{-CH}_2\text{-CH}_2(\text{CH}_3)$ (Note: the rightmost part is written as $\text{CH}_2\text{CH}_2$ with a $\text{CH}_3$ branch below, making it a pentane chain). - **IUPAC naming:** Longest chain containing the carbonyl group is 6 carbons (hexane). Numbering from the left to give the carbonyl the lowest number (C2): $\text{C}^1\text{H}_3\text{-C}^2\text{(=O)-C}^3\text{H}(\text{CH}_3)\text{-C}^4\text{H}_2\text{-C}^5\text{H}(\text{CH}_3)_2$. - **Substituents:** Methyl groups at C3 and C5. - **Name:** 3,5-dimethylhexan-2-one (or 3,5-dimethyl-2-hexanone). - **Family:** Ketone. ## Name compound (e) - **Structure:** $\text{CH}_3\text{-CH}(\text{OH})\text{-CH}_2\text{-CH}_2\text{-CH}(\text{CH}_2\text{CH}_2\text{CH}_3)\text{-CH}_2\text{-CH}_2\text{-CH}_3$ - **IUPAC naming:** Longest chain containing the $\text{-OH}$ group: start from the left $\text{CH}_3$ (C1), go to C2(OH), C3, C4, C5. At C5, we can go either way along the propyl chains. The longest continuous chain is 8 carbons (octanol). - **Substituents:** At C5, there is a propyl group. The $\text{-OH}$ is at C2. - **Name:** 5-propyloctan-2-ol (or 5-propyl-2-octanol). - **Family:** Alcohol. ## Name compound (f) - **Structure:** $\text{H-C(=O)-CH}(\text{CH}_3)\text{-CH}_2\text{-CH}_2\text{-CH}(\text{CH}_2\text{CH}_2\text{CH}_3)_2$ (Note: C1 is the aldehyde carbon $\text{-CHO}$. C2 has a methyl group. C3, C4 are $\text{-CH}_2\text{-CH}_2\text{-}$. C5 is bonded to two propyl groups). - **IUPAC naming:** Longest chain starting from C1: $\text{C}^1\text{HO - C}^2\text{H}(\text{CH}_3)\text{ - C}^3\text{H}_2\text{ - C}^4\text{H}_2\text{ - C}^5\text{H}(\text{CH}_2\text{CH}_2\text{CH}_3)\text{ - C}^6\text{H}_2\text{ - C}^7\text{H}_2\text{ - C}^8\text{H}_3$. This is an octanal chain. - **Substituents:** Methyl at C2, propyl at C5. - **Name:** 2-methyl-5-propyloctanal. - **Family:** Aldehyde. ## Question 3 | Part | IUPAC Name | Organic Family | | :--- | :--- | :--- | | **a)** | 5-butyl-5-propoxynonane | Ether | | **b)** | hexyl 3-methylpentanoate | Ester | | **c)** | 2,3-diethylhexanoic acid | Carboxylic acid | | **d)** | 3,5-dimethylhexan-2-one | Ketone | | **e)** | 5-propyloctan-2-ol | Alcohol | | **f)** | 2-methyl-5-propyloctanal | Aldehyde | { "subject": "Natural Science", "question_type": "Fill-in-the-blank", "knowledge_point": [ "Natural Science", "Chemistry", "IUPAC Nomenclature of Organic Compounds" ] }

Sovi.AI - AI Math Tutor

QUESTION IMAGE

Question

Explanation:

Identify functional groups

Name compound (a)

Name compound (b)

Name compound (c)

Name compound (d)

Answer:

Question 3

Part	IUPAC Name	Organic Family
b)	hexyl 3-methylpentanoate	Ester
c)	2,3-diethylhexanoic acid	Carboxylic acid
d)	3,5-dimethylhexan-2-one	Ketone
e)	5-propyloctan-2-ol	Alcohol
f)	2-methyl-5-propyloctanal	Aldehyde