Organic Chemistry
Organic Chemistry
8th Edition
ISBN: 9781305580350
Author: William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher: Cengage Learning
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Chapter 14, Problem 14.10P
Interpretation Introduction

Interpretation:

In which rule expect for the m/z values of fragment ions resulting from the cleavage of one bond in a compound with an odd number of nitrogen atoms. The reason behind this has to be given.

Concept Introduction:

Nitrogen rule: The nitrogen rule states, that a molecule that has no or even number of nitrogen atoms has an even nominal mass, whereas a molecule that has a odd number of nitrogen atoms has an odd nominal mass.

Organic Chemistry, Chapter 14, Problem 14.10P , additional homework tip  1Molecularformula=CH4ONominalmass=(1×12)+(4×1)+(1×16)=32Thenitrogenatoms=0Nominalmass=32itiseven
Organic Chemistry, Chapter 14, Problem 14.10P , additional homework tip  2Molecularformula=CH5NNominalmass=(1×12)+(5×1)+(1×14)=31Thenitrogenatoms=0Nominalmass=31itisodd

Nominal mass: The nominal mass for an element is the mass number of it is most abundant naturally occurring stable isotope and for an ion or given molecule the nominal mass is the sum of the nominal masses of the constituent atoms.

Example: The exact mass of the most abundant isotopes of each element

For example hydrogen  H=1.007825

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What rule would you expect for the m/z values of fragment ions resulting from the cleavage of one bond in a compound with an odd number of nitrogen atoms?
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Chapter 14 Solutions

Organic Chemistry

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