Chemistry 122/121. Cyclic Hydrocarbons. Both saturated and unsaturated hydrocarbons may be found in the form of a ring. The resulting structure has two less hydrogen than its straight chain counterpart. ID: 577660
DownloadNote - The PPT/PDF document "Hydrocarbon Rings" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Presentations text content in Hydrocarbon Rings
Slide1
Hydrocarbon Rings
Chemistry 122/121
Slide2
Cyclic Hydrocarbons
Both saturated and unsaturated hydrocarbons may be found in the form of a ring
The resulting structure has two less hydrogen than its straight chain counterpart
Butane = C
4
H
10
Cyclobutane
= C
4
H
8
Slide3
Aromatic Hydrocarbons
Historically, these compounds all had an odor associated with them
They may contain a single ring or group of rings
Benzene
is the simplest aromatic
all examples of aromatics have a structure comparable to benzene
Another name for them are
arenes
Slide4
The Structure of Benzene
Benzene is a six carbon ring with a hydrogen atom attached to each carbon
This leaves each carbon available to make a double bond
A maximum of three double bonds can form within the ring
As a result, two diagrams can be written to represent all the places a double bond can exist within benzene
Page 710
Slide5Slide6
Resonance
As a result of double bonds being found in more than one place, the bonding e- between carbon atoms are shared evenly around the ring
Resonance allows the structure to be more stable
Benzene is less reactive than its
alkene
counterpart
Slide7
Substituted Aromatic Hydrocarbons
Compounds that contain
substituents
attached to a benzene ring are called derivatives of benzene
When the benzene ring is the substituent, it is called a
Download this presentation
DownloadNote - The PPT/PDF document "Hydrocarbon Rings" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Presentations text content in Hydrocarbon Rings
Hydrocarbon Rings
Chemistry 122/121
Slide2Cyclic Hydrocarbons
Both saturated and unsaturated hydrocarbons may be found in the form of a ring
The resulting structure has two less hydrogen than its straight chain counterpart
Butane = C
4
H
10
Cyclobutane
= C
4
H
8
Slide3Aromatic Hydrocarbons
Historically, these compounds all had an odor associated with them
They may contain a single ring or group of rings
Benzene
is the simplest aromatic
all examples of aromatics have a structure comparable to benzene
Another name for them are
arenes
Slide4The Structure of Benzene
Benzene is a six carbon ring with a hydrogen atom attached to each carbon
This leaves each carbon available to make a double bond
A maximum of three double bonds can form within the ring
As a result, two diagrams can be written to represent all the places a double bond can exist within benzene
Page 710
Slide5Slide6Resonance
As a result of double bonds being found in more than one place, the bonding e- between carbon atoms are shared evenly around the ring
Resonance allows the structure to be more stable
Benzene is less reactive than its
alkene
counterpart
Slide7Substituted Aromatic Hydrocarbons
Compounds that contain
substituents
attached to a benzene ring are called derivatives of benzene
When the benzene ring is the substituent, it is called a
phenyl
group
Benzene rings that have two
substituents
are called
disubstituted
benzenes
The positions of the
substituents
can be in the 1, 2 (
ortho
), 1,3 (meta), or 1,4 (
para
) position
Slide8Slide9For the remainder of class…
Complete Guided Reading 22.4
Practice Problems – use to review
Interpreting Graphics – 22.4