How many asymmetric carbons are there in pentan-2-one?

Question

BlackTom AI · Accepted Answer

Question restatement: How many asymmetric carbons are there in pentan-2-one?

Option analysis:
Option a: 'a. 0' — This is correct in the sense that pentan-2-one has no chiral (asymmetric) carbons. A carbon is chiral if it has four different substituents. In pentan-2-one (CH3-CO-CH2-CH2-CH3), examine each carbon: the carbonyl carbon is attached to oxygen (double bond) and two carbons, not four different groups, so it is not chiral. The methyl carbon on the left is a CH3 group with three hydrogens, not four different substituents, so not chiral. The two interior carbons (both CH2 groups) each have two hydrogens, so they cannot be attached to four different substituents. The terminal carbon is a CH3 group, also not chiral. Therefore, none of the carbons in this molecule meets the criteria for chirality.

Option b: 'b. 3' — This would imply three of the carbons are chiral. The molecule lacks any carbon with four different substituents; assigning three chiral centers would require three carbons with distinct four-substituent environments, which is not the case here.

Option c: 'c. 2' — This would imply two chiral centers. As explained, none of the carbons possess four different substituents, so having two chiral centers would be incorrect.

Option d: 'd. 1' — This would imply one chiral center. Again, there is no carbon in pentan-2-one that has four different substituents, so this option overstates chirality in the molecule.

Overall, the reasoning shows that none of the carbon atoms carries four distinct substituents, which rules out any chiral center in pentan-2-one, aligning with the expectation that the count is zero.

MUF0042 Chemistry Unit 2 - Semester 1, 2025 2.6 Quiz: Asymmetric Carbons

How many asymmetric carbons are there in pentan-2-one?

查看解析

登录即可查看完整答案

类似问题

How many asymmetric carbon atoms are present in the following compounds?CH3 CH2 CH2 CH(CH3) CH2 CH2 CH2 CH3

How many asymmetric carbon atoms are present in the following compound? CH3 CH2 CHCl CHCl CH2 CH2OH

How many chiral carbons are in the following semi-structural formula?CH3CH2CHClCHOHCH3

Q3 V3Which molecule possess a chiral centre?

How many asymmetric carbons are there in pentan-2-one?

How many asymmetric carbons are in the following molecule?

In a consumer society, many adults channel creativity into buying things

Economic stress and unpredictable times have resulted in a booming industry for self-help products

更多留学生实用工具

考试浏览器助手

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