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Chemistry / Organic Chemistry 7 / Chapter 14 / Problem 8P

Organic Chemistry | 7th Edition | ISBN: 9781269406772 | Authors: Paula Yurkanis Bruice

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Identify the hydrocarbon that has a molecular ion with an

Chapter 14, Problem 8P

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QUESTION:

Identify the hydrocarbon that has a molecular ion with an m/z value of 128, a base peak with an m/z value of 43, and significant peaks with m/z values of 57, 71, and 85.

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QUESTION:

Identify the hydrocarbon that has a molecular ion with an m/z value of 128, a base peak with an m/z value of 43, and significant peaks with m/z values of 57, 71, and 85.

ANSWER:

Solution 8P

The molecular ion has . The moleculy to contain C and H.

Calculate the possible number of carbons and hydrogens in the compound by dividing the of the molecular ion with 12.ar ion has an even mass.

Since, the compound is a hydrocarbon; it is likel

And the remainder is 8 that correspond to the Hydrogen atoms.

The molecular formula with 10 C and 8 H is not possible.

Now, remove 1 C and add 8 H to the derived molecular formula.

So, the possible molecular formula could be .

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