Ch. 4 - Alkanes and CycloalkanesWorksheetSee all chapters
All Chapters
Ch. 1 - A Review of General Chemistry
Ch. 2 - Molecular Representations
Ch. 3 - Acids and Bases
Ch. 4 - Alkanes and Cycloalkanes
Ch. 5 - Chirality
Ch. 6 - Thermodynamics and Kinetics
Ch. 7 - Substitution Reactions
Ch. 8 - Elimination Reactions
Ch. 9 - Alkenes and Alkynes
Ch. 10 - Addition Reactions
Ch. 11 - Radical Reactions
Ch. 12 - Alcohols, Ethers, Epoxides and Thiols
Ch. 13 - Alcohols and Carbonyl Compounds
Ch. 14 - Synthetic Techniques
Ch. 15 - Analytical Techniques: IR, NMR, Mass Spect
Ch. 16 - Conjugated Systems
Ch. 17 - Aromaticity
Ch. 18 - Reactions of Aromatics: EAS and Beyond
Ch. 19 - Aldehydes and Ketones: Nucleophilic Addition
Ch. 20 - Carboxylic Acid Derivatives: NAS
Ch. 21 - Enolate Chemistry: Reactions at the Alpha-Carbon
Ch. 22 - Condensation Chemistry
Ch. 23 - Amines
Ch. 24 - Carbohydrates
Ch. 25 - Phenols
Ch. 26 - Amino Acids, Peptides, and Proteins

When alkanes contain double or triple bonds, that totally changes the way we name the molecule. 

Concept #1: How to name alkenes and alkynes 

Alkenes and alkynes are named as modifiers, meaning we add suffix modifiers to the root chain: 

Double and triple bonds get priority, so try to give them the smallest number possible. 

Example #1: Name the following compound 

(You may see alcohols at the end of the video above. If it is included in your textbook, the videos will be in the corresponding chapter).

 

To find it quickly, just type "Naming Alcohols" in the searchbar at the top of the page :).

 

Nice job, guys! Let's move on to the next topic. 

Additional Problems
Which of the following is the correct IUPAC name for the following compound?a) 4-ethyl-1,3-dimethyl-3-penteneb) 2-ethyl-1,1,3-trimethylbutenec) 3-ethyl-2,4-dimethyl-2-pentened) 2,4-dimethylhexene
The general molecular formula for alkanes is  CnH2n+2. What is the general molecular formula for: (b) Alkenes 
The IUPAC name for the following molecule isA)        2,4-dimethyl-5-hexeneB)        3,5,5-triethyl-1-penteneC)        3,5-dimethyl-1-hexene
Provide a name for the following pure compound. Be sure to name stereoisomers properly, designating configurations when necessary.
Provide the missing information (structure, IUPAC name, or substituents) and also indicate the stereochemistry where necessary (i.e. cis, trans)
Name the following molecule (using IUPAC nomenclature):
Provide a systematic IUPAC name for the molecule below. Remember to include the absolute configuration (R/S) of all the chirality centers in the molecule.
Write structural formulas for each of the following:(a) 1-Heptene
Write structural formulas for each of the following:(b) 3-Ethyl-2-pentene
Write structural formulas for each of the following:(g) 1-Bromo-3-methylcyclohexene
Write structural formulas for each of the following:(h) 1-Bromo-6-methylcyclohexene
Write structural formulas for each of the following:(j) Vinylcycloheptane
Write a structural formula and give two acceptable IUPAC names for each alkene of molecular formula C7H14 that has a tetrasubstituted double bond.
Give an IUPAC name for each of the following compounds:
Name the compound given below.
Give an IUPAC name for each of the following compounds:
Give an IUPAC name for each of the following compounds:
Give an IUPAC name for each of the following compounds:
Give an IUPAC name for each of the following compounds:
Give an IUPAC name for each of the following compounds:
(a) A hydrocarbon isolated from fish oil and from plankton was identified as  2,6,10,14-tetramethyl-2-pentadecene. Write its structure.
What is the systematic name of this compound?a) 2-isobutyl-3-mehtylhex-5-eneb) 5-isobutyl-4-mehtylhex-1-enec) 4,5,7-trimethyloct-1-ened) 2,4,5-trimethyloct-7-ene
Give the IUPAC name for the following molecule:a) 2-chloro-1,4-dimethylcyclohex-4-eneb) 1-chloro-3,6-dimethylcyclohex-3-enec) 3-chloro-2,4-dimethylcyclohexened) 5-chloro-1,4-dimethylcyclohexene
Name the structure below according to IUPAC nomenclature rules. If stereochemistry is indicated in the structure, denote the correct stereochemistry in the name.
Provide an IUPAC name for the following compound
Provide the I.U.P.A.C. name of the following compound: a. 1, 1, 2-trimethylethene b. 2-methylbuta-2-ene c. 1, 2-dimethylprpene d. 2-methyl-2-butene
Spell out the full name of the compound.
Give the IUPAC name of the product that would form when the following cycloalkene
Write the IUPAC name for the compound below. Be sure to use correct punctuation. The IUPAC name is 
Spell out the full name of the compound. 
Which of the following is the correct IUPAC name for the following compound?a. 3-bromo-1,5-cyclohexadieneb. 2-bromo-1,4-cyclohexadinec. 6-bromo-1,3-cyclohexadiened. 5-bromo-1,3-cyclohexadiene  
Provide an IUPAC name for the following compound. 
Spell out the full name of the compound.  
What is the correct name for the compound shown in the attached image?a. 3-phenyl-2-propeneb. 1-phenyl-2-propenec. 3-phenyl-1-propened. 1-phenyl-1-propene  
Write the IUPAC name for the compound below. Be sure to use correct punctuation.
Spell out the full name of the compound. 
Provide an IUPAC name for each of the compounds shown. (Specify (E)/(Z) stereochemistry, if relevant, for straight chain alkenes only. Pay attention to commas, dashes, etc.) 
Name the following alkenes using systematic names. 
What is the IUPAC name of the substance shown in the following line drawing
The molecule pictured below is name:a. cis-2-ethyl-3-octeneb. trans-1-ethyl-1-octenec. trans-5-ethyl-6-octened. cis-4-ethyl-2-octenee. 3-methy-2-heptane 
Choose the correct IUPAC name of the molecule shown below: 1) trans-4-ethyl-5-propyl-4-octene2) cis-4-ethyl-5-propyl-4-octene3) trans-4-propyl-5-ethyl-4-octene 4) 4-ethyl-5-propyl-4-octene 5) none of the above 
Provide the most correct IUPAC name for the compound drawn below. Be sure to use commas and hyphens properly.
Spell out the full name of the compound.  
Name the following alkenes using systematic names.