Structural Isomers: Chain, Position and Functional Group, and Finding Them All | Year 12 Chemistry

Full lesson, notes and practice questions: https://hscscience.com.au/subjects/ch... Ethanol and methoxymethane are made of exactly the same atoms, C₂H₆O, yet one is a liquid and the other a gas. See why a molecular formula doesn't tell you how atoms are joined, and learn the three kinds of structural isomer: chain isomers (a different skeleton), position isomers (the group on a different carbon) and functional group isomers (a different family, like an alkene and a ring). Then find every isomer of C₅H₁₂ systematically and catch duplicates by naming every structure. Two exam-style questions at the end. 0:00 Hook 0:32 Formula vs structure 1:08 Why arrangement matters 1:44 Chain isomers 2:13 Position isomers 2:51 Functional group isomers 3:36 Why group matters 4:00 Classify a pair 4:36 Find every isomer 5:08 Spot duplicates 5:34 Memory aid 5:49 Attempt 1 6:17 Feedback 1 6:45 Attempt 2 7:08 Feedback 2 7:34 Handoff 7:52 Key notes Chemistry 2017: Year 12 Module 7, Organic Chemistry. Syllabus dotpoint (NSW Chemistry Stage 6, 2017, Module 7): "explore and distinguish the different types of structural isomers, including saturated and unsaturated hydrocarbons, including: (ACSCH035) chain isomers position isomers functional group isomers" Official 2017 course: https://www.nsw.gov.au/education-and-... Prerequisites: How do we name and draw a carbon chain? Next: How does carbon bonding explain hydrocarbon properties? #Year12Chemistry #Isomers #HSCScience