Lecture #4-Alkenes and Alkynes, Structure and...
Transcript of Lecture #4-Alkenes and Alkynes, Structure and...
![Page 1: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/1.jpg)
CH2210
Unsaturated Hydrocarbons
![Page 2: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/2.jpg)
Chemical Formulas and Unsaturation
C C C C C
C C C C C
H H H H H
H H H H H
H C C C C C H
H H H H H
H H H H H
H C C C C
H H H H
H H
C
H
H
H
H
H
Cn
CnH2n
CnH2n+2
CnH2n+2
![Page 3: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/3.jpg)
Chemical Formulas and Unsaturation
C C C C C
Cn
C C C C C
Cn
C C C C C
Cn
CnH2n
H C C C C C H
H H H
H H H H H
C
C
C C
C
CnH2n
C
C
C C
C
HH
H
H
H
H H
H
H
H
![Page 4: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/4.jpg)
Chemical Formulas and Unsaturation
Hydrocarbons
SaturatedHydrocarbons
UnsaturatedHydrocarbons
AlkanesCnH2n+2
CycloalkanesCnH2n
(one ring)
AlkenesCnH2n
(one C=C)
AlkynesCnH2n-2
(one C C)
BenzeneC6H6
CnH2n-6
![Page 5: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/5.jpg)
Review of Carbon Bonding Patterns
![Page 6: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/6.jpg)
Classes of “Unsaturated” Hydrocarbons
120º120º 180º
![Page 7: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/7.jpg)
C C
H
H H
H
C CH
H H
H
N o t e : B o t h o f t h e s e representations picture the two components of the double bond as being identical. This is not the case.
Lewis Representation of Ethene
![Page 8: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/8.jpg)
C Cπ bond
𝜎 bond
:
Structure of the Carbon-Carbon Double Bond
The carbon-carbon double bond is constructed from two sp2 hybridized carbon atoms.
.
.
![Page 9: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/9.jpg)
Covalent Bonding in Ethene
The two carbons and all four hydrogens all lie within the same plane. The bond angles are all 120º.
![Page 10: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/10.jpg)
Nomenclature of Alkenes
1. Select the longest carbon chain containing the double bond as the parent chain. Replace the “-ane” ending with “-ene.
2. Number the parent chain beginning at end closest to the double bond beginning with the first carbon in the chain.
3. Locate and name the substituents in alphabetical order.
4. Compounds with two double bonds are called dienes.
5. Cyclic compounds are named as cycloalkenes. Carbons in the double bond are always numbered first. Then the ring is numbered in the direction so as to give the lowest numbers to substituents.
![Page 11: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/11.jpg)
Isomerism in Alkenes
H2C CH CH2CH2 CH3
H3C CH CH CH2 CH3
H3C CH2 CH CH CH3
Positional Isomerism
1-pentene
2-pentene
????also
2-pentene
Geometric Isomerism (a form of stereoisomerism)
![Page 12: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/12.jpg)
Alkenes-Nomenclature
![Page 13: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/13.jpg)
Alkenes-Nomenclature
2-hexene 2-methyl-3-hexene
![Page 14: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/14.jpg)
2,3-dimethyl-1-pentene
Alkenes-Nomenclature Practice
2,3-dimethyl-2-hexene
**
![Page 15: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/15.jpg)
Alkenes-Nomenclature
4-methylcyclohexene
Name as a cyclohexene
![Page 16: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/16.jpg)
Alkenes-Nomenclature Practice
2,5-dimethyl-2-heptene 3,3-dimethylcyclopentene
**
![Page 17: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/17.jpg)
Alkene Nomenclature
![Page 18: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/18.jpg)
H3C CH2 CH2 C CH2 CH3
CH2
H3C CH CH CH CH CH
CH2 CH3
CH3
CH3
CH3
CH3Cl
CH2CH3
1-pentene2-ethyl-
3-octenetrimethyl-2,5,6-
cyclohexene-chloro- -ethyl- -methyl5 3 1
1a)
b)
c)
*
*
*
![Page 19: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/19.jpg)
Geometric Isomerism (a form of stereoisomerism)
Isomerism in Alkenes
Exists for the following cases:
C C
X
Y
A
B
A≠B and E≠D
C C
X
Y
A
B
C C
Y
X
A
B
A result of lack of free rotation around the double bond
X
E
D
E
D
D
E
![Page 20: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/20.jpg)
Isomerism in Alkenes
![Page 21: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/21.jpg)
Isomerism in Alkenes Cis/trans isomers have different physical properties
![Page 22: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/22.jpg)
Isomerism in Alkenes
Cis/trans isomers are not possible for some alkenes.
![Page 23: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/23.jpg)
cis-4-methyl-2-hexene
Alkenes-Nomenclature Practice
trans-5,6-dimethyl-3-heptene
H3CCH2
CC C
CH3
HC
H
H
H
H3CCH3
H3CCH2
C
C C
H H
H3C HCH3*
*
![Page 24: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/24.jpg)
2a) cis-1-chloro-1-butene
b) trans-3-hexene
c) trans-4,4-dimethyl-2-pentene
d) cis-1,3-dichlorocyclohexane
C C
Cl C CC C
Cl CH2 CH3
H H
C C
C
C C
C
C C
CH2
CH2 CH3
H3C H
H
C C
C
C C
C C
H3C
C CH3
CH3
H3C
H
H
Cl
Cl
![Page 25: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/25.jpg)
Alkynes
![Page 26: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/26.jpg)
Alkynes Structure of the Triple Bond
N o t e : B o t h o f t h e s e representations picture the three components of the t r i p l e b o n d a s b e i n g identical. This is not the case.
C C H H C CH H
![Page 27: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/27.jpg)
Summary of Hydrocarbon Bonding
![Page 28: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/28.jpg)
Nomenclature of Alkynes
1. Select the longest carbon chain containing the triple bond as the parent chain. Replace the “-ane” ending with “-yne.
2. Number the parent chain beginning at end closest to the triple bond beginning with the first carbon in the chain.
3. Locate and name the substituents in alphabetical order.
![Page 29: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/29.jpg)
Alkynes-Nomenclature Practice
4,4-dimethyl-1-hexyne 2,7-dimethyl-4-octyne
HCCH2
CCCH2
HC
CH3
CH3
H3C
CH3*
*C
CH2
CCH2
H3C
CH3C
H CH3* *
*
*
![Page 30: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/30.jpg)
Alkynes-Nomenclature Practice
H3C
Cl
Cl
C C CH
CH3
CH3Excess Br2 in the dark
2,2-dichloro-5-methyl-3-hexyne
HC C CH2 CH2 C
CH3
CH3
CH3Excess HBr in the dark
5,5-dimethyl-1-hexyne
C
![Page 31: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/31.jpg)
Properties of Alkenes and Alkynes
Chemical Properties
Undergo combustion as do alkanes .
Alkenes and Alkynes-reactive at the multiple bond.
Physical Properties
Nonpolar and insoluble in water as are alkanes.
Nonpolar, therefore Boiling points depend on size and shape.
Alkenes may display cis-trans isomerism.
![Page 32: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/32.jpg)
Supplement on Hybridization
in Ethene
![Page 33: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/33.jpg)
Carbon: ground-state electron configuration
2p
2s
1s
2p
2s
1s
Carbon: excited-state electron configuration
Carbon:
sp2-hybridized electron configuration
2p
2sp2
1s
}hybridization
excitation
En
erg
yThe sp2 Hybridization Scheme for Carbon
![Page 34: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/34.jpg)
Hybrid Orbitals - Bonding in Methane
Recall that the four orbitals associated with the bonding in an alkane or cycloalkane are the result of “sp3 hybridizaton.”
(s + p + p + p)
![Page 35: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/35.jpg)
Hybrid Orbitals - Alkenes
Carbon: ground-state electron configuration
2p
2s
1s
Carbon:
sp2-hybridized electron configuration
2p
2sp2
1s
hybridization
excitation
En
erg
y
The four orbitals associated with the
bonding in alkenes or cycloalkenes are the result
of “sp2 hybridizaton.”
![Page 36: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/36.jpg)
Covalent Bonding in Ethene
C2H4, ethene, is formed from two sp2 hybridized carbon atoms and four hydrogen atoms:
Lateral overlap of the unhybridized p orbitals, above and below the triangular planes, results in a π bond of the double bond.
![Page 37: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/37.jpg)
Supplement on Hybridization
in Ethyne
![Page 38: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/38.jpg)
Carbon: ground-state electron configuration
2p
2s
1s
Carbon: sp2-hybridized electron configuration
2p
2sp2
1shybridization
excitation
En
erg
yThe sp Hybridization Scheme for Carbon
The four orbitals associated with the bonding in alkynes or
cycloalkynes are the result of “sp hybridizaton.” sp carbon
![Page 39: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/39.jpg)
sp carbon sp carbon
Alkynes-Structure of the Triple Bond
![Page 40: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/40.jpg)
Supplement on Hybridization
in Ethene
![Page 41: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/41.jpg)
7 sigma bonds
Ethane, CH3CH3The sp3 hybrid orbitals of
two carbons overlap
The remaining sp3 hybrid orbitals overlap with hydrogen s orbitals
![Page 42: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/42.jpg)
5 sigma bonds
Ethene, CH2CH2The sp2 hybrid orbitals of
two carbons overlap
The remaining sp2 hybrid orbitals overlap with hydrogen s orbitals
![Page 43: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/43.jpg)
Ethene, CH2CH2
The remaining unhybridized p
orbitals overlap to form a ∏ bond.
5 sigma bonds and 1 ∏ bond
![Page 44: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/44.jpg)
3 sigma bonds
Ethyne, CHCHThe sp hybrid orbitals of
two carbons overlap
The remaining sp hybrid orbitals overlap with hydrogen s orbitals
![Page 45: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/45.jpg)
Ethyne, CHCH
The remaining unhybridized p
orbitals overlap to form 2 ∏ bonds.
3 sigma bonds and 2 ∏ bonds
![Page 46: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/46.jpg)
Alkynes-Structure of the Triple Bond
![Page 47: Lecture #4-Alkenes and Alkynes, Structure and ...profkatz.com/courses/wp-content/uploads/2019/05/Lecture...Properties of Alkenes and Alkynes Chemical Properties Undergo combustion](https://reader030.fdocuments.in/reader030/viewer/2022040213/5e987c6d83982e40e7341ff7/html5/thumbnails/47.jpg)
Bonding in HCCHH C C H
H
C
C
H