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

Question

BlackTom AI · Accepted Answer

The question asks us to determine how many chiral centers are present in the given semi-structural formula: CH3CH2CHClCHOHCH3.

Option a. 1: This would be true if only one carbon in the chain had four distinct substituents. However, we need to examine each potential stereocenter carefully before concluding.

Option b. 2: This is plausible because two different carbons may each be bonded to four different groups, creating two stereocenters. Specifically, consider the carbon labeled as CHCl (the third carbon from the left): it is attached to H, Cl, the ethyl group (CH2CH3), and the remaining fragment (CHOHCH3). All four substituents are distinct, so this carbon is a stereocenter. Next, look at the carbon labeled as CHOH (the fourth carbon): it is bonded to OH, H, a CH3 group, and the previous carbon (CHCl-...), which are all different, making this carbon also a stereocenter.

Option c. 3: To reach three chiral centers, there would need to be three carbons with four distinct substituents. In this molecule, only two carbons meet the criterion described above; the remaining carbons (terminal CH3, CH2, and possibly others) do not have four different substituents.

Option d. 4: This would require all four carbons in the chain to be stereocenters. In this structure, the terminal methyl carbon (CH3) and the second carbon (CH2) are not chiral, since they have at least one pair of identical substituents or insufficient connectivity for four distinct groups.

To recap the reasoning: the third carbon (the one bearing Cl) has four different substituents (H, Cl, ethyl group, and the rest of the chain), making it chiral. The fourth carbon (the one bearing OH) also has four different substituents (OH, H, methyl group, and the preceding carbon fragment), making it chiral as well. Therefore, there are two chiral centers in total, and option b is correct. The other options miscount or misclassify the chirality of one or both of these centers.

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

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

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?

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

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