Alkanes – saturated hydrocarbons. The names The halogen is treated as a substituent on an alkane chain. Alkenes and Alkynes – unsaturated hydrocarbons. Organic: Nomenclature–Alkanes, Alkenes, & Alkynes.  . Other Actions. Embed Nomenclature: Alkanes, Alkenes, and Alkynes. basic IUPAC naming. The nomenclature for alkanes is based on To name an alkane, first identify the .

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Organic: Nomenclature–Alkanes, Alkenes, & Alkynes Tutorial | Sophia Learning

Alkanes are the simplest hydrocarbons known to us. A cyclic ring hydrocarbon is designated nomehclature the prefix cyclo- which appears directly in front of the base name. This compound contains 16 hydrogen atoms for a molecular formula of C 8 H Recycling plastics helps minimize the need for using more of the petrochemical supplies and also minimizes the lakyne damage caused by throwing away these nonbiodegradable materials.

The base of the name will be pentane. If you prefer to suggest your own revision of the article, you can go to edit mode requires login.

Solution The longest carbon chain runs horizontally across the page and contains six carbon atoms this makes the base of the name hexane, but we will also need to incorporate the name of the branch. These names are listed within the discussion of naming alkanes. Did you notice how there is no methene? The name of an alkene is derived from the name of the alkane with the same number of carbon atoms. Adding functional groups to the structure of a polymer can result in significantly different properties see the discussion about Kevlar later in this chapter.

When more than one substituent is present, either on the same carbon atom or on different carbon atoms, the substituents are listed alphabetically. Examples include the dehydration of alcohols and the alkehe loss of a hydrogen atom and a halogen atom of alkyl halides. This puts the substituents on positions 1 and 2 numbering from the other end would put the substituents on positions 3 and 4. Physical properties for Alkye 4 H 10 and heavier molecules are those of the normal isomern -butane, n -pentane, etc.


The product of the halogenation reaction will have two chlorine atoms attached to the carbon atoms that were a part of the carbon-carbon double bond:. Other plastics, like polyethylene bags and polypropylene cups, plastic food containerscan be recycled or reprocessed to be used again. Alkenes and alkynes, on the other hand, are unsaturated hydrocarbons. This leads to differences in geometries and in the hybridization of the carbon orbitals.

Butane, C 4 H 10used in camping stoves and lighters is an alkane.

If chains of equal length are competing for selection as the parent chain, then the choice goes in series to: The chemistry of these compounds nomenxlature called organic chemistry. The numbers should go from lowest to highest, and be separated from one another by a comma.

Contact our editors with your feedback. Natural occurrence Ethylene is formed in small amounts as a plant hormone.

The halogens are represented as follows: What Is Meant By Alkebe. Polyethylene is a commodity plastic used primarily for packaging bags and films. The octane number of a sample of petrol is Olefins are hydrocarbons compounds containing hydrogen [H] and carbon [C] whose molecules contain a pair of carbon atoms linked together by a double bond.

A two-carbon chain is called ethane; a three-carbon chain, propane; and a four-carbon chain, butane.

Nomenclature of Alkanes, Alkenes and Alkynes – IUPAC Nomenclature

The sequence of alternating single and double bonds in lycopene is an example of a conjugated system. The root chain must be numbered from the end nearest a double bond carbon atom.

Solution The reactant is a nomenclatue chain that contains a carbon-carbon double bond, so the base name will be pentene. Your contribution may be further edited by our staff, and its publication is subject to our final approval. There are eight places where lines intersect or end, meaning that there are eight carbon atoms in the molecule.


Again, the hydroxyl gets priority in the numbering of the parent chain. Number the carbons of the parent chain from the end that gives the substituents the lowest numbers. Each type of recyclable plastic is imprinted with a code for easy identification.

IUPAC Nomenclature of Alkanes, Alkenes and Alkynes

They are identical because each contains an unbranched chain of four carbon atoms. Strong, stable bonds between carbon atoms produce complex molecules containing chains, nomwnclature, and rings. Longer chains are named as follows: Identify the hybridization and bond angles at the carbon atoms in the molecule shown:.

If there is a choice in numbering not alkye covered, the parent chain is numbered to give the substituents the lowest number at the first point of difference. Higher alkenes and cycloalkenes are normally prepared by reactions in which a double bond is introduced into a saturated precursor by elimination i. The position of the hydroxyl group s on the parent chain is are indicated by placing the number s corresponding to the location s on the parent chain directly in front of the base name same as alkenes.

Remember it is not necessary to specify the location of the carboxyl group because it will automatically be carbon 1. Lakane number the carbon atoms in the chain by counting from the end of the chain nearest the substituents. Solution Each carbon atom is converted into the end of a line or the place nomenclaature lines intersect. Kerosene, diesel oil, and fuel oil are primarily mixtures of alkanes with higher molecular masses.

If there are alksne or 4 non-hydrogen different atoms attached to the alkene then use the E, Z system.