Question

An alkane with the formula C6H14 can be prepared by hydrogenation of either of two precursor alkenes having the formula C6H12.
Write the structure of this alkane.
What is the Iupac name for the alkane.
Show on of the reactions that form this alkane.

The alkane is not hexane and it does not look like a six carbon chain.

Answer 1

two precursor alkenes

    H₃C  CH₃
         I   I
H₂C=C-CH-CH₃    2,3-dimethyl-1-butene

   H₃C      CH₃
        I       I
H₃C-CH=CH-CH₃    2,3-dimethyl-2-butene


alkane

   H₃C     CH₃
        I      I
H₃C-CH-CH-CH₃    2,3-dimethylbutane

    H₃C  CH₃                        H₃C     CH₃
         I   I                                   I      I
H₂C=C-CH-CH₃  + H₂ → H₃C-CH-CH-CH₃ 
  
    H₃C   CH₃                       H₃C     CH₃
        I    I                                   I      I
H₂C-C=CH-CH₃  + H₂ → H₃C-CH-CH-CH₃ 

Answer 2

Answer:

2-methylpentane

Explanation:

Hello,

On the attached document, you will find the solution for this exercise. It is important for you to notice that at the reactions there are two possible precursors, 2-methylpentene and 4-methylpentene which are suitable to form 2-methylpentane via hydrogenation.

Best regards.