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PRACTICAL
ORGANIC CHEMISTRY
by
FREDERICK GEORGE MANN
Sc-D.
(Cantab.),
D.Sc.
(Lond.),
F.R.I.C.,
F.R.S.
FELLOW,
TRINITY COLLEGE,
CAMBRIDGE,
UNIVERSITY
EMERITUS
READER
IN
ORGANIC CHEMISTRY
and
BERNARD
CHARLES SAUNDERS
C.B.E.,
M.A.,
Sc.D.
(Cantab.),
D.Sc.
(Lond.),
F.R.I.C.,
F.R.C.
Path.
LONGMAN
London
and New
York
LONGMAN
GROUP
LIMITED
London
Associated
companies,
branches
and
representatives
throughout
the
world
Published
in the
United
States
of
America
by
Longman
Inc.,
New
York
Fourth Edition
©
Frederick George Mann
and
Bernard Charles Saunders
1960
All
rights reserved.
No
part
of
this publication
may be
reproduced, stored
in a
retrieval system,
or
transmitted
in any
form
or by any
means, electronic, mechanical, photocopying,
recording,
or
otherwise, without
the
prior permission
of the
Copyright owner.
First Published
1936
Second
Edition
1938
New
Impressions
1941,1942,
1943,
I
944,
X
94
6
,
1
947,
T
949,
*95
2
Third
Edition
1952
New
Impressions
1954,
*955,
I95
6
,
I
957>
J
95<?
Fourth Edition
1960
New
Impressions
1961,
1962,
1964,
1967,
/970,
/977
Neiv
Impression with revisions
1974
New
Impression
KJ/5
Reprinted
in
paper
covers,
igj8
British Library
Cataloguing
in
Publication
Data
XEW
IMPRESSION,
1974
The
last
(4th)
Edition
of
this book appeared
in
1960,
and has
been
followed
by
four
New
Impressions,
the
last
in
1967.
The
rapid
and
ceaseless changing
of the
presentation
of
organic
chemistry—
both theoretical
and
practical—warranted
an
entirely
new
edition,
but
this would have entailed
a
massive task,
for
which neither
Dr. B. C.
Saunders
nor I had
time
or
opportunity
to
undertake.
The
publishers therefore suggested that
a new
impression
should
be
prepared.
This
also proved
a
laborious task, partly
because
of the
many minor changes
in
nomenclature
and—more
particularly—the
presentation
of
names that
the
recommenda-
tions
of the
LU.P.A.C.
required,
and
partly because
all
correc-
tions
and
additions were necessarily limited
in
length
to the
space which
the
original
text
had
occupied.
Several
of my
chemical
colleagues have suggested
that
a new
edition
of
'M.
and
S.'
should
now
deal
also with
the
chief
branches
of
modern spectroscopy.
This
would
be an aim
both
excellent
and
impracticable. Students have their
own
mono-
graphs
on
spectroscopy
and
their
own
teachers, whose exposition
should
clarify
the
branches
of
this subject more rapidly
and
easily
than
the
printed
text.
An
attempt
to
deal adequately with
spectroscopy
in
this volume would greatly increase
its
size
and
probably
fail
in
purpose—the
fate
of
several books whose authors
have
attempted this ambitious programme.
Wc are
greatly
indebted
to Dr. D. K. C.
Cooper,
F.R.C.S.,
who has
critically
examined
the
section
on
First-Aid
to
ensure
that
it now
harmonises with
modern
medical practice.
F. G.
Mann,
University
Chemical
Laboratory,
Cambridge.
March
1973.
PREFACE
TO
FOURTH
EDITION
IN
the
preparation
of
this revised
and
extended edition,
we
have
had
in
mind
two
major factors.
First,
considerably greater emphasis
has
been placed
on
semi-
micro techniques
and
their application
to
preparations, separa-
tions, analysis
and
physical determinations such
as
those
of
molecular weight.
We
have therefore greatly expanded
the
section
on
Manipulation
on a
semi-micro
scale which
was in the
Third
Edition,
and we
have described many more preparations
on
this
scale, some independent
and
others
as
alternatives
to
the
larger-scale preparations which immediately precede them.
Some
40
separate preparations
on the
semi-micro
scale
are
described
in
detail,
in
addition
to
specific
directions
for the
preparation
of
many classes
of
crystalline derivatives required
for
identification
purposes.
The
equipment required
for
these
small-scale reactions
has
been selected
on a
realistic basis,
and
care
has
been taken
not to
include
the
very curious pieces
of
apparatus sometimes suggested
as
necessary
for
working
on the
semi-micro scale.
Secondly, whilst retaining undiminished
the
full
and
clear
directions provided
for
students
who are
starting
the
study
of
practical organic chemistry,
we
have extended
the
scope
of the
work
so
that
it
covers most
of the
needs
of
students working
for
an
Honours
or
Special Degree.
To
meet
the
needs
of the
advanced students, preparations
have
now
been included
to
illustrate,
for
example, reduction
by
lithium aluminium hydride
and by the
Meerwein-Ponndorf-
Verley method, oxidation
by
selenium dioxide
and by
periodate,
the
Michael, Hoesch,
Leuckart
and
Doebner-Miller
Reactions,
the
Knorr pyrrole
and the
Hantzsch
collidine syntheses,
various
Free
Radical reactions,
the
Pinacol-Pinacolone, Beckmann
and
Arbusov Rearrangements,
and the
Bart
and the
Meyer Reactions,
together with many others.
These
preparations, with those noted
in the
Preface
to the
Third
Edition, cover
a
considerable proportion
of the
standard
synthetic reactions. Most
of
these preparations come towards
the
end of
Part
II
(Preparations),
and
both elementary
and
advanced
students should have
no
difficulty
in
selecting
the
preparative
work
they require.
In
earlier
editions,
Part
III
(Reactions
and
Identification
of
viii
PREFACE
TO
FOURTH
EDITION
Organic Compounds)
was
designed
to
give students
a
thorough
training
in the
general reactions
of the
simpler members
of
each
of
the
main
classes
of
organic compounds,
and in the
methods
by
which
an
unknown compound could
be first
allocated
to its
class
and
then
identified. Clearly, more advanced students will
meet
a
wider range
of
members
of
each class
of
compound,
and
the
final
identification
must
usually
be
based
on the
melting-
points
of
crystalline derivatives.
We
have therefore inserted
in
the
account
of
each class
a
note
of the
types
of
crystalline deriva-
tives which
can be
most rapidly
and
reliably prepared, with
full
experimental details.
Our
Tables
of
Melting-points
of
deriva-
tives, given
at the end of the
book, have been very considerably
extended,
so
that
the
advanced student, who, like
the
elementary
student,
must
first
allocate
his
unknown compound
to its
class,
can
now
prepare
one or
more crystalline derivatives,
and
com-
plete
the
identification
by
reference
to
these tables.
The
pre-
paration
of
these crystalline derivatives gives
the
student
a
further
and
very valuable exercise
in
semi-micro preparations.
It
should
be
emphasised that
in
Sections
10-27
°f
^
ai
"t
HI,
i.e.,
the
sections which
are
each devoted
to one
class
of
com-
pound,
the
simpler
or
more common members
are
still clearly
specified,
and
their reactions discussed,
so
that again
the
less
advanced student
can
readily discern
the
range
of the
material
which
is his
immediate concern.
For the
more advanced student,
we
have extended
the
section
on
Quantitative Semi-micro Analysis,
and we
have included
a
section dealing with Special Techniques
in
Separation
and
Purification,
namely Adsorption
Chromatography,
Paper Chro-
matography,
and
Ion-Exchange Processes.
The use of
more complex
or
more costly articles
of
equipment,
such
as
catalytic
hydrogenation
apparatus, autoclaves, polari-
meters,
ultraviolet absorption spectrometers, etc.,
has not
been
described,
because
the
type
of
such apparatus employed
in
different
laboratories
varies considerably,
and
students must
be
taught
the
use of
their
own
laboratory equipment.
In the
First
Edition
of
this book,
we
included
a
short
section
to
illustrate
some
of the
more simple
or the
more
clearly
defined
reactions
which
are
promoted
by
enz\mes.
It was
hoped
that
this section
might
stimulate
the
interest
of
younger
chemists
in
the
preparative
value
oi
such
T
cactioris,
but
organic
chemists
still
largely
ignore this
branch
oi
preparative
work.
We
have
now
deleted
certain portions
of
this section,
and
emphasised other
portions having greater current interest.
PREFACE
TO
FOURTH EDITION
ix
Throughout
this
edition
the
nomenclature adopted
is in
general
that
recommended
by the
International Union
of
Pure
and
Applied Chemistry,
and by the
Chemical Society
(1959).
In the
preparation
of
this edition,
we are
indebted
for
much
help
to
many
of our
colleagues,
and in
particular
to Dr. P.
Sykes,
Dr. F. B.
Kipping,
Dr. P.
Maitland,
Dr. J.
Harley-Mason
and
Dr. R. E. D.
Clark.
We
have maintained
the
standard which
was
self-imposed
\vhen
this book
was first
written, namely, that
all
the
experiments
in the
book
had
been
critically
examined,
and
then
performed either
by the
authors,
or
under their super-
vision.
The
heavy load
of
work
\vhich
this
has
involved would
have been impossible without
the
willing,
patient,
and
very
considerable
help
of
AIr.
F. C.
Baker
and Mr. F. E. G.
Smith.
F.
G.
M.
Cambridge,
1960
B.C.S.
PREFACE
TO
THIRD
EDITION
FOR
the
production
of
this edition,
we
have made
a
thorough
and
critical revision
of the
whole
contents
of the
book, based
on our
experience
of its use in the
laboratory
and on the
general advance
in
organic chemical practice.
In
addition
to
this general revision.
however,
we
have extended
the
book
in
three
main directions.
The
book
as
originally planned
was
intended
to
meet
the
needs
primarily
of
pupils'in
the
senior forms
at
schools
and of
under-
graduates
up to the
level
of a
Pass
Degree.
We
have extended
Parts
II
and III
dealing with Preparations
and
with
the
Reactions
and
Identification
of
Organic Compounds
so
that
the
book should
now
cater
fully
for the
needs
of
students working
for
Honours
Degrees.
In
particular,
the
Preparations
now
include examples
of
most
of the
more simple standard reactions:
for
this pur-
pose
we
have
now
added,
for
example, preparations illustrating
the
Benzidine Transformation,
the
Ullmann
Condensation,
the
Benzilic Acid Rearrangement,
the
Reformatsky Reaction,
the
Clemmensen Reduction,
the
Fischer Indolisation Reaction,
the
Mannich
Reaction,
and the
Diels-Alder
Reaction.
It is
probable
that preparative work
on a
much smaller scale
than
has
hitherto
been customary
in
teaching laboratories will become more
common
in
future.
To
meet this need,
we
have added
a
short
section
to
Part
I,
describing
the
design
and use of
apparatus
for
this purpose,
and we
have also included some examples
of
these
small-scale preparations
as
alternatives
to the
larger preparations
in
Part
II.
In
Part
III, dealing with
the
Reactions
and
Identification
of
Organic Compounds, greater emphasis
has now
been placed
on
the
preparation
of
suitable crystalline derivatives. Quite apart
from
the
importance
of
these derivatives
for
purposes
of
identi-
fication,
encouragement
is
thereby given
to the
student
to
gain
experience
in
small-scale preparative work.
We
have also added
an
entirely
new
section dealing with semi-
microanalysis.
In our
original Introduction
(p. ix) we
justified
the
retention
of
macro-methods
of
quantitative analysis
on the
grounds that they formed
an
excellent introduction
to
micro-
methods
and
also
afforded
a
valuable training
in
exact manipula-
tion generally.
By
now, however,
the
macro-estimation par-
ticularly
of
carbon
and
hydrogen
and of
nitrogen
has
disappeared
entirely
from
most laboratories.
On the
other hand,
the
micro-
PREFACE
TO
THIRD
EDITION
xi
methods developed
so
largely
by
Pregl,
and
which usually require
no
more than
5
mgm.
of
material, necessitate prolonged training
and an
impeccable experimental technique,
and
give consistently
reliable
results only
in the
hands
of
full-time
analysts.
They
are
consequently
unsuitable
for
students.
The
semi-micro methods
of
analysis, which usually require
20-50
mgm.
of
material,
form
an
ideal compromise
for
student-training,
for the
necessary
technique
can be
acquired after only
a few
attempts.
These
methods moreover provide
the
student with very valuable
manipulative
exercise,
and
serve
as an
introduction
to the
hand-
ling
of
even smaller quantities
of
material which
may
arise
in
his
post-graduate work.
This
section
on
Semi-microanalysis
has
been designed
and
written
by Dr. P.
Sykes,
and is
based
on his
experience
of
teaching such methods
in the
Cambridge labora-
tories.
We
wish
to
thank
him
sincerely
for a
valuable
contribution
to
this work.
In the
original planning
of
this
book
we
were
at
pains
to
ensure that
the
preparations
in
particular were designed
to
afford
a
minimum expenditure
of
time, materials
and
heating.
We
hope that
the
economy thus introduced
will
be
especially
appreciated
in
view
of the
recent heavily increased cost
of
chemicals,
fuel
and
laboratory service.
This
increased
cost,
incidentally,
must necessarily increase
the
attraction
of the
small-scale
preparations referred
to
above.
We are
grateful
to our
colleagues
for
many valuable discussions
and
suggestions:
in
particular
we
would mention
Dr. F. B.
Kipping,
Dr. P.
Maitland,
Dr. G. W.
Kenner
and Mr. J.
Harley-
Mason.
We
should also
like
to
express once again
our
sincere thanks
for
the
considerable help
we
have received
from
our
laboratory
assistants,
Mr. F. C.
Baker
and Mr. F. E.
Smith.
F.G.M.
B.C.S.
PREFACE
TO
SECOND EDITION
THE
two
chief additions which have
now
been made
are the
Sodium Carbonate-Zinc Method
as an
alternative
to
Lassaigne's
Sodium
Fusion Method
for
detecting
elements
in
organic
com-
pounds,
and the
Tables
of
Physical Constants which have been
included
in the
Appendix.
These
Tables
have been compiled
to
cover
a
very much wider scope
of
organic compounds than
those described
in
this book.
In
addition
to the
general
utility
of
these
Tables,
we
hope that they
will
be of
value
to
students
wishing
to
extend their practice
in the
identification
of
organic
compounds
beyond
the
range given
in
Part
III of
this book.
This
range
has
been deliberately limited
in
order
to
enable
students
to
obtain
a firm
grasp
of the
methods
of
identifying
simple
compounds,
and
these methods have therefore been based
almost
entirely
on
chemical
reactions alone. When
the
range
of
organic compounds
to be
identified
is
extended,
and
particularly
when higher
homologues
are
being investigated,
identification
by
the
physical properties
of
derivatives becomes increasingly
necessary,
and the
Tables
of
Physical Constants should con-
siderably facilitate
this
extension.
We
wish
to
express
our
gratitude
to the
chemists
who
have
made
suggestions with regard
to the
subject-matter
of
this book:
many
of
these suggestions have
now
been incorporated
in
this
edition.
W
r
e
would warmly welcome further suggestions
for
improving
its
contents.
F.G.M.
B.C.S.
INTRODUCTION
THIS
laboratory manual
of
organic chemistry
has
been compiled
primarily
to
cover
the
work required
for
Part
I of the
Natural
Sciences
Tripos
at
Cambridge
University,
the
General
B.Sc.
course
at
London University,
and the
Pass
Degree courses
at
other universities.
At the
same time, however,
it has
been
carefully
arranged
to
cover adequately
the
needs
of
students
pro-
ceeding
to the
M.B.
examinations
in
organic chemistry
at the
various
universities. Moreover, since
the
introductory
work
has
been given
in
considerable detail,
the
book
is
suitable
for
senior pupils
at
schools (more particularly
for
Higher Certificate
and
University
Entrance
Scholarship candidates),
and
should
therefore
be
sufficient
to
cover both their school
and
university
needs.
This
work
is
based largely
on the
authors'
experience with
the
teaching
of
practical organic chemistry
to
very large classes
of
students
at
Cambridge University.
For
such classes experimental
directions
involving
the
utmost economy
in
chemicals
and
apparatus,
and
also
in the
students'
time,
are
obviously required.
Therefore
the
whole
of the
experimental work described
in
this
book
has
been
repeatedly checked
by the
authors themselves (and
for
the
most
part
by
their
classes
also)
in
order
to
obtain
the
desired results with
a
minimum expenditure
of
materials
and
time.
In the
section
on
Organic Preparations
in
particular, this
detailed investigation
of
each preparation
has
frequently enabled
unexpected
simplifications
and
economies
to be
introduced, more
particularly
as
many text-books still contain experimental direc-
tions
which have frequently remained unchanged since their
original publication
in
chemical journals many years ago,
and
in
which, moreover, occasional errors both
in
fact
and in
tran-
scription have
thus
remained uncorrected.
It is
almost uni-
versally
found
that
departments
of
organic chemistry
are
more
costly
to
maintain than other science departments, primarily
because
of the
heavy consumption
of
organic reagents
and
sol-
vents,
and the
economies which have
now
been
effected
will,
we
think,
be
appreciated
by
most teachers
of
practical organic
chemistry.
Teachers
of
chemistry (and
of the
sciences generally)
will
have
found
that many students appear
to
dissociate their practical
work
sharply
in
their minds
from
their theoretical knowledge. Many
xiii
[...]... these methods and of their comparative practical value This combination of theory and practice will, it is hoped, both simplify and elucidate the practical study of organic chemistry, and enable the student to visualise his practical work as an orderly whole and not as a vast number of isolated and unrelated experiments Part III, on the Reactions and Identification of Organic Compounds, has been strictly... Simple Enzyme Reactions, is rather a new departure in practical books of this type The importance of INTRODUCTION xv this section to medical students, biochemists, physiologists, etc., is obvious We consider, however, that students of chemistry who are not reading any biological subject should have some practical knowledge of a branch of organic chemistry which is of the greatest scientific importance,... describe here the general methods of filtration The two principal occasions in organic chemistry when filtration is necessary are: * A simpler \\ater-condenser having both ends comically ground (cf (B), p 45), and a thin-walled inner tube, is lighter and more efficient than those illustrated above io PRACTICAL ORGANIC CHEMISTRY (A) A solid substance has crystallised from a solution, and it is necessary... simple distillation from their practical inorganic chemistry Other students should determine the boiling-point of acetone (56°), using a water-bath and water-condenser, or of benzene (81°), using a sand-bath and water-condenser, and finally of either aniline (184°) or nitrobenzene (210°), using for both these liquids a sand-bath and aircondenser Filtration Before discussing the practical details of the purification... essentially from the practical standpoint The student should always acquaint himself with the theoretical basis of these operations, for which he should consult any standard text-book of physical chemistry: this applies particularly to such processes as the distillation of constant boiling-point mixtures, steam-distillation, ether extraction, etc The experimental operations in organic chemistry which occur... liquids, unless otherwise stated, is given at i5°C The experiments described in Part I have been numbered, as they form a graded series to illustrate the chief manipulative processes employed in practical organic chemistry The experiments in Parts 11-V have not been numbered, as in general a selection must be made from them In each part of the book, the experiments have been arranged as far as possible... not necessarily the order of increasing difficulty XlX PART I METHODS AND MANIPULATION IN this part of the book, a brief account is given of the chief manipulative processes which are used in practical organic chemistry Most of these processes are those which students are likely to use repeatedly in their work The remainder are not of such frequent occurrence, but are processes with which more advanced... simple programme given in Part III before proceeding to wider and more detailed systems for the identification of organic compounds The comparatively wide prevalence of micro-methods of quantitative organic analysis, applied more particularly to the estimation of the constituent elements in an organic compound, may cause the advisability of including the macro-methods in Part IV to be questioned Quite... chemically pure This is almost invariably the cause of a sharp melting-point (2) Substance is a eutectic mixture of two or more compounds The chance of a given mixture containing two compounds 2 PRACTICAL ORGANIC CHEMISTRY in just the proportion to give a sharp-melting eutectic mixture is so remote that this possibility may be neglected [Occasionally arbitrary mixtures of two substances which (usually)... possesses the following very suitable properties: (a) it has a low specific heat and therefore the temperature can be easily increased using only a small (B) flame, (b) even when hot it FIG i 4 PRACTICAL ORGANIC CHEMISTRY is almost non-inflammable, and therefore should the flask break whilst still over the flame, the oil seldom ignites, (c) the oil is non-corrosive, and owing to its low specific heat . will,
we
think,
be
appreciated
by
most teachers
of
practical organic
chemistry.
Teachers
of
chemistry (and
of the
sciences generally)
will
have
found
. practical value.
This
combination
of
theory
and
practice
will,
it is
hoped, both
simplify
and
elucidate
the
practical
study
of
organic chemistry,
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