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Chapter 13: Q 5. (page 501)

Question: What molecular ions would you expect for the compound depicted in the ball-and-stick model?

Short Answer

Expert verified

Answer

For the given compound, 162 and 164 molecular ions are expected.

Step by step solution

01

Identify the elements by analyzing the model

The tetravalent black ball symbolizes a carbon atom, the white ball symbolizes a hydrogen atom.

The red ball with only one bond, that is double the size of a carbon atom, must be a bromine atom.

02

Predicting the molecular ion

The molecular ion is predicted by calculating the molecular weight of the compound. A molecular ion is formed when a molecule experiences either the removal or addition of one/multiple electrons.

03

Determination of the molecular ions

The given molecular formula is C6H11Br. Bromine has two isotopes,79叠谤鈥塧苍诲鈥�81Br.

The molecular weight is calculated below:

C6H1179叠谤鈥夆赌�=鈥�6脳12+11脳1+79脳1=72+11+79=162

C6H1181叠谤鈥夆赌�=鈥�6脳12+11脳1+81脳1=72+11+81=164

Hence, the molecular ions are 162 and 164.

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Most popular questions from this chapter

Question: How do the IR spectra of the isomers cyclopentane and pent-1-ene differ?

Question:Match each structure to its mass spectrum.

Question:Like alcohols, ethers undergo 伪 cleavage by breaking a carbon鈥揷arbon bond between an alkyl group and the carbon bonded to the ether oxygen atom; that is, the red C鈥揅 bond in R鈥�CH2OR'is broken. With this in mind, propose structures for the fragments formed by 伪 cleavage of(CH3)2CHCH2OCH2CH3. Suggest a reason why an ether fragments by 伪 cleavage.

Question:Propose four possible structures for a hydrocarbon with a molecular ion at m/z= 112.

Question:Propose a structure consistent with each set of data.

a. a compound that contains a benzene ring and has a molecular ion at m/z= 107

b. a hydrocarbon that contains only sp3 hybridized carbons and a molecular ion at m/z= 84

c. a compound that contains a carbonyl group and gives a molecular ion at m/z= 114

d. a compound that contains C, H, N, and O and has an exact mass for the molecular ion at

101.0841
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