Naming Alkenes
[Pages:2]Naming Alkenes
Suffix: -ene
Many of the same rules for alkanes apply to alkenes
1. Name the parent hydrocarbon by locating the longest carbon chain that contains the double bond and name it according to the number of carbons with the suffix -ene.
H3C CH2
C H3C CH2 CH2
CH2
Parent = pentene
H3C CH2
C H3C CH2 CH2
CH2
not hexene (does not contain double bond)
2. a. Number the carbons of the parent chain so the double bond carbons have the lowest possible numbers.
H3C CH2 CH2 CH CH CH3 65 4 3 2 1
2-hexene
b. If the double bond is equidistant from each end, number so the first substituent has the lowest number.
CH3
H3C CH CH CH CH2 CH3 123 4 5 6
2-methyl-3-hexene
3. Write out the full name, numbering the substituents according to their position in the chain and list them in alphabetical order.
4. Indicate the double bond by the number of the first alkene carbon.
H3C CH2 CH2 CH CH CH3 65 4 3 2 1
2-hexene
5. If more than one double bond is present, indicate their position by using the number of the first carbon of each double bond and use the suffix -diene (for 2 double bonds), -triene (for 3 double bonds), -tetraene (for 4 double bonds), etc.
H2C CH CH2 CH CH2 123 45
1,4-pentadiene
H2C CH CH CH CH3 123 45
1,3-pentadiene
6. a. Cycloalkenes are named in a similar way. Number the cycloalkene so the double
bond carbons get numbers 1 and 2, and the first substituent is the lowest possible
number.
CH3
CH3
3
6
2
5
1
1
3-methylcyclohexene
4
2
3
NOT 6-methylcyclohexene
b. If there is a substituent on one of the double bond carbons, it gets number 1.
CH3
5
4
CH3
1
32
1,5-dimethylcyclopentene
CH3
3
4
CH3
2
5
1
NOT 2,3-dimethylcyclopentene
Alkenes as Substituents:
CH CH2
CH2 CH CH2
CH2
CH3 HC
ethenyl or vinyl (vinylcyclohexane)
2-propenyl or allyl
methylene
ethylidene
(allylcyclohexane) (methylenecyclohexane) (ethylidenecyclohexane)
Non-IUPAC Alkenes (Table 6.1, pg. 184)
H2C CH2
ethylene (ethene)
H3C CH CH2
propylene (propene)
H3C
C CH2
H3C
isobutylene (2-methylpropene)
CH3
H2C C CH CH2
isoprene (2-methyl-1,3-butadiene)
................
................
In order to avoid copyright disputes, this page is only a partial summary.
To fulfill the demand for quickly locating and searching documents.
It is intelligent file search solution for home and business.
Related download
- fatty acids nomenclature of fatty acids
- naming alkenes
- how to arrange non conventional names in reference citations
- patient identification using two patient identifiers
- commonly occurring asa softball rules and points of emphasis
- fraud schemes and their characteristics fannie mae
- resolving and using var i macro variables
- last name first name
- 1 lecture 9 ii nomenclature rules for alkenes
- mla style an introduction
Related searches
- importance of naming a child
- erp naming contest
- naming your child
- report naming best practices
- help naming my business
- naming of organic compounds pdf
- naming inorganic compounds pdf
- naming parts of sentences worksheets
- naming part and telling part
- naming parts of a sentence
- us navy ship naming convention
- us navy ship naming procedure