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Organic Chemistry – Some Basic Principles And Techniques

Question

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Which branched chain isomer of the hydrocarbon with molecular mass 72u gives only one isomer of mono substituted alkyl halide?

Tertiary butyl chloride

Neopentane

Isohexane

Neohexane

Solution

B.

Neopentane

C_nH2_n+2 = 12n+ (2n+2)
n=5
Thus, hydrocarbon is C₅H₁₂

Since it gives only single C₅H₁₁Cl, thus C₅H₁₂ is symmetrical. It is neo pentane.

Molar mass = 72

Some More Questions From Organic Chemistry – Some Basic Principles and Techniques Chapter

What are isomers?

How many chain isomers are possible for pentane?

Which characteristic is common to different isomers of a compound?

Name three alkanes which do not show chain isomerism.

Name the types of structural isomerism shown by alkanes.

Name the four main types of structural isomerism.

Write the three possible open chains of five carbon atoms

What types of structural isomerism is shown by the following pairs of organic compounds ?

Write the tautomer of acetaldehyde and write its IUPAC name.

Draw the structure of the tautomer of phenol and write its IUPAC name.

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