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
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CHAPTER 7 ALKYNES
sp-hybridized carbon
1 triple bond =
one σbond and two πbond
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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”.
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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
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Via elimination reaction of dihalides
Preparation of C2H2
Not isolated