Q3 V3Which molecule possess a chiral centre?

Question

BlackTom AI · Accepted Answer

To determine which molecule has a chiral centre, we examine the carbon atoms to see if any one carbon is bonded to four different groups.
Option a: CH2CHNH2. The carbon in question is CH2, which has two hydrogens attached, so it cannot be a chiral centre. Therefore this molecule cannot have a chiral centre at that position.
Option b: CH2(NH2)COOH. This structure corresponds to glycine, where the central carbon is CH2 bonded to NH2 and COOH but also to two hydrogens. With two identical substituents (two hydrogens), that carbon is not stereogenic, so no chiral centre here.
Option c: CH3CH(NH2)COOH. This is an alanine-like structure where the second carbon (the one bearing NH2) is bonded to four different groups: a methyl group (CH3), an amino group (NH2), a carboxyl group (COOH), and a hydrogen (implied). Since all four substituents are distinct, this carbon is a chiral centre, making the molecule chiral.
Option d: CH3CH(NH2)CH3. Here the second carbon bears NH2, but its other substituents are two methyl groups (both CH3) on either side, which are identical. A carbon with two identical groups cannot be a stereocentre, so this molecule is not chiral.
In summary, only option c presents a carbon atom bonded to four different substituents, satisfying the definition of a chiral centre, while the other options fail that criterion for various reasons.

Q3 V3Which molecule possess a chiral centre?

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

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