IR10.  Additional Problems

Problem IR10.1.

For each of the following hand-drawn cartoons of IR spectra, identify the bond(s) that correspond to the indicated peaks.

i.

ii.

iii.

iv.

v.

vi.

vii.

viii.

ix.

x.

xi.

xii.

xiii.

Problem IR10.2.

For each of the following hand-drawn cartoons of IR spectra, identify the functional group suggested by the spectrum.

a)

b)

c)

d)

e)

f)

g)

h)

i)

j)

k)

Problem IR10.3.

a) Identify at least three important peaks/bonds in each of the following IR spectra.

b) Identify the functional group present in each of these samples. See the Functional Group Section

for help.

c) Draw a possible structure for each of these compounds (there may be many, many correct answers).

problem i)

problem iii)

problem iv)

problem v)

Problem IR10.4.

Sketch an approximate IR spectrum for each of the following compounds:

Problem IR10.5.

The oop bends are sometimes useful in distinguishing substitution pattrens around a benzene ring. Using the spectra of o-, m-, and p-xylene, formulate some guidelines about what the oop bends look like when substituents are one, two or three carbons away on a benzene ring.

Figure IR18. IR spectrum of m-xylene.

Source: SDBSWeb : http://riodb01.ibase.aist.go.jp/sdbs/ (National Institute of Advanced Industrial Science and Technology of Japan, 14 July 2008)

Figure IR19. IR spectrum of o-xylene.

Source: SDBSWeb : http://riodb01.ibase.aist.go.jp/sdbs/ (National Institute of Advanced Industrial Science and Technology of Japan, 14 July 2008)

Figure IR20. IR spectrum of p-xylene.

Source: SDBSWeb : http://riodb01.ibase.aist.go.jp/sdbs/ (National Institute of Advanced Industrial Science and Technology of Japan, 14 July 2008)