The compound that is a structural isomer of CH3CH2COOH is

Question

BlackTom AI · Accepted Answer

Question restatement: The compound that is a structural isomer of CH3CH2COOH is

Options:
 a. HCOOCH2CH3
 b. CH3COOCH2CH3
 c. CH3CH(OH)CH2OH
 d. CH3CH2CH2OH

Now, evaluate each choice in turn:

Option a: HCOOCH2CH3. This molecule is ethyl formate, an ester with the formula C3H6O2. The given reactant CH3CH2COOH (propanoic acid) also has the formula C3H6O2. Since both have identical molecular formula and share the same connectivity class (they are not the same compound, but they can be considered structural isomers, i.e., same formula but different bonding/connectivity), this option matches the criterion of being a structural isomer of CH3CH2COOH.

Option b: CH3COOCH2CH3. This compound is ethyl acetate, which contains four carbon atoms in total (two from acetyl CH3CO– and two from the ethyl CH2CH3 group), giving the formula C4H8O2. Because its carbon count differs from CH3CH2COOH (C3H6O2), it cannot be a structural isomer of CH3CH2COOH. The discrepancy in molecular formula rules this one out.

Option c: CH3CH(OH)CH2OH. This is a molecule with three carbons and two hydroxyl groups, i.e., a propanediol, with a formula around C3H8O2. While it has the same carbon count as propanoic acid, the presence and placement of two hydroxyl groups indicate a different functional group and connectivity. The formula suggests C3H8O2 rather than C3H6O2, so it is not a structural isomer of CH3CH2COOH.

Option d: CH3CH2CH2OH. This is propanol, an alcohol with formula C3H8O. Again, the hydrogen and oxygen counts differ from CH3CH2COOH, which has C3H6O2. Therefore, this is not a structural isomer of the given carboxylic acid.

Summary: Among all options, only option a (HCOOCH2CH3, ethyl formate) shares the same molecular formula as CH3CH2COOH and differs in connectivity, meeting the definition of a structural isomer. The other options either have a different carbon count or a different functional group, leading to different molecular formulas or connectivity patterns that disqualify them as structural isomers of CH3CH2COOH.

The compound that is a structural isomer of CH3CH2COOH is单项选择题

类似问题

Which of the following is not a structural isomer of but-1-ene

Which of the following compounds is not a structural isomer of 2,2,4-trimethylpentane?

Which of the following alkanes is a structural isomer of cis-hex-3-ene?

Choose a, b, c or d as the best answer. 2. Which statement about Brutalist buildings would the author, most probably, agree with?

Question 30 Choose a, b, c or d as the best answer. The author’s main argument is that the 100:80:100 model __________.

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单