The question asks if the following are chiral or achiral. Asfar as I know, chira

Question

The question asks if the following are chiral or achiral. Asfar as I know, chiral is a molecule that it's mirror image isnon-superimposible on the original and achiral is identical to itsmirror image with a plane of symmetry. So... How do I know ifthese are chiral or a achiral? These are the products of radicalclorination of 2-methylpentane.
a)CH3CH2CH2CHCH2Cl                                  c) CH3CH2CHCHCH3
                                  |             |       |
                         CH3                                                                                 Cl   CH3
                          Cl
     |                                       
b)CH3CH2CH2CCH3                                                         d) CH3CHCH2CHCH3
                                  |                                                                                     |               |
                                  CH3                                                                          Cl              CH3

e) ClCH2CH2CH2CHCH3
                             |
                            CH3

It says in the answer that b and e are achiral and therest are chiral, can someone explain to me how they got thisanswer? Thanks! Sorry I couldn't get all the linesstraight on here, but I'm pretty sure you can figure out whichCarbons the cl and ch3 are attached to in the chain. Thanks!

Explanation / Answer

To be chiral a carbon needs to have 4 differentsubstituants a) the second carbon (starting from right) is chiral, it has aCH3, a H, a Cl and the rest of the chain as subsituant. b) none of them c)the third carbon (starting from right) is chiral d)the third carbon e)none of them Also, you see that when Cl is added at the end of themolecule, it doesn't give a chiral molecule, because the carbonstill has 2 H's on it.

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