All Chapters Video 3.3 Naming Alkenes Chapter OutlineChapter Quiz Question? Ask Dr. Mike! Lesson Summary When naming alkenes, the same rules apply for alkanes with the addition of four rules: 1. Use suffix “-ene” instead of “-ane”. 2. Add a number at the start of the double bond. 3. Add prefixes “cis” or “trans” for alkenes with different priority substituents, and at least one hydrogen on either side of the alkene. 4. If all substituents are different, use the E/Z naming system, where E = highest priority substituents on opposite sides, and Z = highest priority substituents on the same side. 1. Use suffix “-yne” instead of “-ane”. 2. Add a number at the start of the triple bond. Determining priority 1. Highest atomic number = highest priority. 2. If there’s a tie, keep going to adjacent carbons until you break the tie. 3. Multiple-bonded atoms are counted as the same number of single-bonded atoms: Lesson 3.3 Naming Alkenes 3.1 IUPAC Basics and Naming Alkanes 3.1 Quiz Video Solution 3.2 Naming Cycloalkanes and Alkyl Halides 3.2 Quiz Video Solution 3.3 Naming Alkenes 3.3 Quiz Video Solution (Pt. 1) 3.3 Quiz Video Solution (Pt. 2) 3.3 Quiz Video Solution (Pt. 3) 3.4 Naming Alcohols, Ethers, and Amines 3.4 Quiz Video Solution (Pt. 1) 3.4 Quiz Video Solution (Pt. 2) 3.5 Naming Aldehydes and Ketones 3.5 Quiz Video Solution 3.6 Naming Carboxylic Acids and Derivatives 3.6 Quiz Video Solution 3.7 Naming Aromatics 3.7 Quiz Video Solution 3.8 Naming Polyfunctional Compounds 3.8 Quiz Video Solution (Pt. 1) 3.8 Quiz Video Solution (Pt. 2) Instructor Dr. Mike Christiansen Dr. Christiansen is a chemistry professor at Utah State University and has a PhD in organic chemistry. He's been teaching students chemistry for nearly 12 years.