,NOMENCLATURE ,
STRUCTURAL AND DISPLAYED FORMULA
Number of carbons Prefix
1 meth-
2
e+ h -
3
prop-
& bond
but
-
Single ane
S
pent- Double bond -
ene
6
nex-
7
hept-
y
Oct -
9
non-
18 dec-
Rules
carbon carbon chain
.
1 Find the longest to
·
2 Identify the side branches
.
3 Circle all the functional groups and identify them
chain that branch with the
highest priority functional
.
4 Number the so the
group
&
has the lowest number possible
.
5 Di- ,
tri- ,
etc used for more than one branch of some kind
.
6 Branches in alphabetical order
.
7 Comma's between numbers e .
.
g 2
,
2 or 2
,
3
numbers from letters and between
.
8 Hyphens separate no
gaps names
N A M 1 N G A L K AN ES
H
↑
H
↑
H
↑
, a↑
H
11230? C -
C C- c
-
- -
H S
1
I I
i
H H H H
H Oc + ane
H C -
H
⑳
I
, ⑪
methyl
H -
C -
H
It H 11
↑
↑ ↑ -
C- C C C H 2-methyl pentance
4
-
1 -
- -
-
23 a S
I I I , I
H H H H
H
H
↑
H -
C - H
6
I
C
H - -
H
H
equel
H H H -
C -
H H
4
↑
d
↑
↑ ↑
C C
H
3-ethylhexane
-
-
- -
c -
C -
H
1 2 3
I , I I
H H
in I H
H
methyl
J
H -
C -
H
H H
H
↑ d
↑ M ↑
H
3-dimethylpentane
13
C
c c
-
n = C - -
2 ,
1 S
! I
H H ↓
H
-
C -
H
I
H
methyl
If
ethyl
↑
H -
C -
H
J
H c H
nu
-
-
H n
M
↑ ↑
↑ ↑ ↑ ↑ n ↑
1
5
- 5-diethyl-3-methylostane
- 3 C 1 4
-
-
-
7 · ,
1
↓ ↓ ↓
'
I
n H -
-
H
H -
C -
H
I
c
P -
methyl
ethyl
&
methyl
methe H
a
n - c -
Hi c -
n
H J ↑
↑
n- Cp
H
?
H
35-4 3
- -
-
18 - dimethyldecane
Cs
,
n - -
H
I
-En e
H
U
E
-
H
↑
-
↑ 2
C -
C
-
H
+ 6
H
-
-
H
↳ e ,
, SKLETAL FORMULA / INTRODUCTION
carbon makes
based c-chain >
organic-molecules
-
on A
↑ BONDS
-
N
common heteroatoms
- 0
, , X
Skele + al Displayed
H
1
C -
H
i
H -
H
~ H
H >
I H
H
n H
!
H
_ C-
i
C
OH ! i
H -
C -
C -
C
1
O
-"
H
n H
I
H
HN
n n
, ,
H C
nc -
H
C
I II
"c
C
H
H
& C
,
H
· +
c
=
p
C c =
"I
-
-
-H
STRUCTURAL AND DISPLAYED FORMULA
Number of carbons Prefix
1 meth-
2
e+ h -
3
prop-
& bond
but
-
Single ane
S
pent- Double bond -
ene
6
nex-
7
hept-
y
Oct -
9
non-
18 dec-
Rules
carbon carbon chain
.
1 Find the longest to
·
2 Identify the side branches
.
3 Circle all the functional groups and identify them
chain that branch with the
highest priority functional
.
4 Number the so the
group
&
has the lowest number possible
.
5 Di- ,
tri- ,
etc used for more than one branch of some kind
.
6 Branches in alphabetical order
.
7 Comma's between numbers e .
.
g 2
,
2 or 2
,
3
numbers from letters and between
.
8 Hyphens separate no
gaps names
N A M 1 N G A L K AN ES
H
↑
H
↑
H
↑
, a↑
H
11230? C -
C C- c
-
- -
H S
1
I I
i
H H H H
H Oc + ane
H C -
H
⑳
I
, ⑪
methyl
H -
C -
H
It H 11
↑
↑ ↑ -
C- C C C H 2-methyl pentance
4
-
1 -
- -
-
23 a S
I I I , I
H H H H
H
H
↑
H -
C - H
6
I
C
H - -
H
H
equel
H H H -
C -
H H
4
↑
d
↑
↑ ↑
C C
H
3-ethylhexane
-
-
- -
c -
C -
H
1 2 3
I , I I
H H
in I H
H
methyl
J
H -
C -
H
H H
H
↑ d
↑ M ↑
H
3-dimethylpentane
13
C
c c
-
n = C - -
2 ,
1 S
! I
H H ↓
H
-
C -
H
I
H
methyl
If
ethyl
↑
H -
C -
H
J
H c H
nu
-
-
H n
M
↑ ↑
↑ ↑ ↑ ↑ n ↑
1
5
- 5-diethyl-3-methylostane
- 3 C 1 4
-
-
-
7 · ,
1
↓ ↓ ↓
'
I
n H -
-
H
H -
C -
H
I
c
P -
methyl
ethyl
&
methyl
methe H
a
n - c -
Hi c -
n
H J ↑
↑
n- Cp
H
?
H
35-4 3
- -
-
18 - dimethyldecane
Cs
,
n - -
H
I
-En e
H
U
E
-
H
↑
-
↑ 2
C -
C
-
H
+ 6
H
-
-
H
↳ e ,
, SKLETAL FORMULA / INTRODUCTION
carbon makes
based c-chain >
organic-molecules
-
on A
↑ BONDS
-
N
common heteroatoms
- 0
, , X
Skele + al Displayed
H
1
C -
H
i
H -
H
~ H
H >
I H
H
n H
!
H
_ C-
i
C
OH ! i
H -
C -
C -
C
1
O
-"
H
n H
I
H
HN
n n
, ,
H C
nc -
H
C
I II
"c
C
H
H
& C
,
H
· +
c
=
p
C c =
"I
-
-
-H
