BOLW ↓
Aromaticity
DELOCALIZED ELECTRONS : WHEN ELECTRONS ARE NEY CONFINED TO A ATOM OR BOND DELOCALIZATION INCREASES
STABAMY
SINGLE
,
,
Resource Structures Allows deLocated ELECTRON And Modern Thi HOW
Drthny
See WHERE are
Us To
They
RESONANCE FORMS DO NOT EXIST AS N Rules For
CHARGE
DELOCATED HOWEVER . ,
DISTINLT Species . OVERALL
CONNECTNy Remem
CONSTANT .
Resonance :
look for Resonance Hybrids
WErgHED Average
are a
IMPORTANT PATTERNS To
IT Bond Beside An Acom With A Love
1 Park : of RESONANCE STRUCTURES BASED ON THEIR . RESONANCE FORMS HAVE
COMRIBEMY
1 No REAl ExiSTENCE
.
2 Or iT Bond RESONANCE
STABMAY LONE Parr ELECTRONS In
·
.
only
C H T
g STRUCTURES
H Oa
+
-
H
&
H O 3
. so
HyperValent 2nd Row CLEMENTS
Structurer structure
4
. MUST HAVE ORBAL
· E OVERLAp
Love PAR Beside An ACOM W/OO A full OCTET MORECUTE'S
ENERGY
.
2 . DELOCALMATTON LOWERS
5
.
6
H EquratEn STRUCTURES MAKE
EquNALENT CONTRIBUTIONS
H H
H
CN : -
REPRESENTED BY TWO STRUCTURES INSIDE BRACKETS WHE MORE STABLE STRUCTURE MAKES A
SQUARE LARGER
+
C N
H
It H
H
MOVENTAG
WITH AN ARROW RESONANCE . COVED CONTRIBUTON OTHERWISE
ARROWS ARE USED TO SHOW ELECTRON CELOCALIZATION .
. THE MORE CONALENT
7 BONUS A STRUCTURE HAS, THE MORE STABLE
Bonds
.
3 Two Or MORE
Adjacent # is
H
.
8 Full VALENCE SHELLS ARE MORE STABLE THAN deficient ONES
H It
.
H
I
H It
C
C
T
C
H C C
·
O
It .
9
CHARGE Separation
decreases
STABrMy
+ C C
-
for Apart
Charges
Witnes: Like
It
H It
Oppose
CHARGES
close-
10
. NEGAINE CHARGE ON MORE ELECTRONEGAINE ATOM .
RESONANCE & REACTIONS : RESONANCE of A MOLECULE CAN TELL US A LOT ABOUT HOW I WILL REACT
.
# HAS An Effect On REACTONY & Rate of REACTION .
MotECUTES WHOU RESOMANCE ARE LESS STABLE SNCE ELECTRON
DELOCALIZATION ACTS MOLECMES WMHOU RESONANCE ARE MORE REACTNE HOWEVER THIS
CHARGES
TO STABMAE . .
STABMTEATON Of
CHANGE
ALLOWS REACTIONS TO
PROCEED FASTER THAN
THEY Would OTHERWISE AROMATICMY-BENZENE : BENEEME is PLANAR ,
Cyclic And , SACRATED
.
of BENLENE doubled
HavingAlternating
is THAT
DESPHE
INTERESTAGquarry
An
Bonds Bards .
LEngTH STRENGTH
ALL THE CARBON-CARBON Are a
EquanaLent
in
SINGLE
,
i s BECAUSE BENZENE
THIS is A
Hybrid of TWO RESOMANCE STRUCTURES CALLED KEKULE
Bonds Between & double C-c Bonds
Single
Structures . All are in
Enga
Streng Bonds
I
TEORETICALLY BECAUSE DOUBLE ARE SHORTER THAN Bonds THE
Sigle
, ,
CycoHExATRENE PREDICTED STRUCTURE of BENEME Should Be THE of ALL THE c-cBowds
,
Less
Regular
.
EquUMENCE
STRUCTURE of Benzene, much is a indication of resource
strong
.
LESS STABLE .
E >
Benzene KEKvE STRUCTURES
Aromaticity
DELOCALIZED ELECTRONS : WHEN ELECTRONS ARE NEY CONFINED TO A ATOM OR BOND DELOCALIZATION INCREASES
STABAMY
SINGLE
,
,
Resource Structures Allows deLocated ELECTRON And Modern Thi HOW
Drthny
See WHERE are
Us To
They
RESONANCE FORMS DO NOT EXIST AS N Rules For
CHARGE
DELOCATED HOWEVER . ,
DISTINLT Species . OVERALL
CONNECTNy Remem
CONSTANT .
Resonance :
look for Resonance Hybrids
WErgHED Average
are a
IMPORTANT PATTERNS To
IT Bond Beside An Acom With A Love
1 Park : of RESONANCE STRUCTURES BASED ON THEIR . RESONANCE FORMS HAVE
COMRIBEMY
1 No REAl ExiSTENCE
.
2 Or iT Bond RESONANCE
STABMAY LONE Parr ELECTRONS In
·
.
only
C H T
g STRUCTURES
H Oa
+
-
H
&
H O 3
. so
HyperValent 2nd Row CLEMENTS
Structurer structure
4
. MUST HAVE ORBAL
· E OVERLAp
Love PAR Beside An ACOM W/OO A full OCTET MORECUTE'S
ENERGY
.
2 . DELOCALMATTON LOWERS
5
.
6
H EquratEn STRUCTURES MAKE
EquNALENT CONTRIBUTIONS
H H
H
CN : -
REPRESENTED BY TWO STRUCTURES INSIDE BRACKETS WHE MORE STABLE STRUCTURE MAKES A
SQUARE LARGER
+
C N
H
It H
H
MOVENTAG
WITH AN ARROW RESONANCE . COVED CONTRIBUTON OTHERWISE
ARROWS ARE USED TO SHOW ELECTRON CELOCALIZATION .
. THE MORE CONALENT
7 BONUS A STRUCTURE HAS, THE MORE STABLE
Bonds
.
3 Two Or MORE
Adjacent # is
H
.
8 Full VALENCE SHELLS ARE MORE STABLE THAN deficient ONES
H It
.
H
I
H It
C
C
T
C
H C C
·
O
It .
9
CHARGE Separation
decreases
STABrMy
+ C C
-
for Apart
Charges
Witnes: Like
It
H It
Oppose
CHARGES
close-
10
. NEGAINE CHARGE ON MORE ELECTRONEGAINE ATOM .
RESONANCE & REACTIONS : RESONANCE of A MOLECULE CAN TELL US A LOT ABOUT HOW I WILL REACT
.
# HAS An Effect On REACTONY & Rate of REACTION .
MotECUTES WHOU RESOMANCE ARE LESS STABLE SNCE ELECTRON
DELOCALIZATION ACTS MOLECMES WMHOU RESONANCE ARE MORE REACTNE HOWEVER THIS
CHARGES
TO STABMAE . .
STABMTEATON Of
CHANGE
ALLOWS REACTIONS TO
PROCEED FASTER THAN
THEY Would OTHERWISE AROMATICMY-BENZENE : BENEEME is PLANAR ,
Cyclic And , SACRATED
.
of BENLENE doubled
HavingAlternating
is THAT
DESPHE
INTERESTAGquarry
An
Bonds Bards .
LEngTH STRENGTH
ALL THE CARBON-CARBON Are a
EquanaLent
in
SINGLE
,
i s BECAUSE BENZENE
THIS is A
Hybrid of TWO RESOMANCE STRUCTURES CALLED KEKULE
Bonds Between & double C-c Bonds
Single
Structures . All are in
Enga
Streng Bonds
I
TEORETICALLY BECAUSE DOUBLE ARE SHORTER THAN Bonds THE
Sigle
, ,
CycoHExATRENE PREDICTED STRUCTURE of BENEME Should Be THE of ALL THE c-cBowds
,
Less
Regular
.
EquUMENCE
STRUCTURE of Benzene, much is a indication of resource
strong
.
LESS STABLE .
E >
Benzene KEKvE STRUCTURES
