ORGANIC CHEMISTRY
Instructors: Dr. Lê Vũ Hà & Dr. Nguyễn Đăng Khoa
Office: 211B2
Email: lvha@hcmut.edu.vn
khoand1989@hcmut.edu.vn
Main compiler: Prof. Dr. Phan Thanh Sơn Nam
Ho Chi Minh University of Technology –VNU HCMC
Department of Chemical Engineering
Division of Organic Chemistry
2
CHAPTER 7 –ALKYNES
sp-hybridized carbon
1 triple bond =
one σbond and two πbond
3
Nomenclature of Alkynes
•The IUPAC name of an alkene is obtained by replacing the “ane”
ending of the corresponding alkane with “yne”
• The compounds containing both double and triple bonds are “enyne”.
4
Preparation of C2H2
Classic method
Modern methods: thermal decomposition or partial combustion of
methane
2CH4 2HC≡CH + 3H2
6CH4+ O22HC≡CH + 2CO + 10H2
1500 oC, 0.1 s
1500 oC, 0.1 s
5
Via elimination reaction of dihalides
Preparation of C2H2
Not isolated
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