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Chapter 13: Q43P (page 611)

Draw structures for a saturated hydrocarbon that has a molecular ion with an m/zvalue of 128.

Short Answer

Expert verified

The first compound is nonane, second compound is 2-methyloctane and the third compound is 4-methyloctane.

Step by step solution

01

Step-by-step-solutionStep 1: Saturated hydrocarbons

Saturated hydrocarbons constitute hydrocarbons where the carbon-carbon bonds are single bonds. This is used to indicate alkanes, an acyclic hydrocarbon comprising only sp3 hybridized carbon atoms. An example of a saturated hydrocarbon is propane.

02

Structure of a saturated hydrocarbon with m/z value of 128

Dividing 128 by 13 gives 9 and the remaining part is 11. So the base value is C9H20.As the compound is a saturated hydrocarbon, the base value is the molecular formula of the compound. Some of the possible structures can be given as:

Possible structures of the compound

The first compound is nonane, second compound is 2-methyloctane and the third compound is 4-methyloctane.

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Most popular questions from this chapter

Question:How can IR spectroscopy be used to distinguish between the following compounds?

  1. a ketone and an aldehyde
  2. cyclic ketone and an open-chain ketone
  3. benzene and cyclohexane
  4. cis-2-hexene and trans-2-hexene
  5. cyclohexene and cyclohexane
  6. a primary amine and a tertiary amine

Question: a. An oxygen containing compound shows absorption band at1700cm-1and no absorption bands at -3300cm-1, -2700cm-1 or -1100cm-1. what class of compound is it?

b. A nitrogen containing compound shows no absorption at -3400cm-1 and no absorption bands between -1700cm-1 and -1600cm-1 or between 2260cm-1 and 2220cm-1. What class of compounds is it?

Question: for each of the following pairs of compounds, name one absorption band that can be used to distinguish between them.

a.

A mass spectrum shows significant peaks at m/z = 87, 115, 140, and 143. Which of the following compounds is responsible for that mass spectrum?

Question:Rank the following compounds from highest wavenumber to lowest wavenumber for their C=O absorption bands:

a.

b.
See all solutions

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