Symmetry Operations and Point Groups
Watch the Introduction to Symmetry Operations lecture video below.
Introduction to Symmetry Operations
Chemistry 107 Lecture 01
Explanation: An introduction to symmetry elements and operations in group theory; proper rotation (Cn), planes of symmetry (sigma), inversion (i), and improper rotation (Sn).
Video: YouTube Video: URL: https://youtu.be/OUj4j6td1es?list=PLqOZ6FD_RQ7kGnKLTbdwZ3IGVNXK43k7S, 33 minutes.
pdf Supporting Materials: Chemistry 107 lecture supplements: Introduction to Symmetry Operations (1_Ch4_Symmetry Operations.pdf).
Test your understanding:
Introduction to Symmetry Quiz - "XeF4" (pdf) (solution)
GrpTheorySymmOperations Quiz - "SiCl4" (pdf) (solution)
GrpTheorySymmOperations Quiz - "C6H6" (pdf) (solution)
Worksheet:
Symmetry and Point Groups (pdf) (solutions)
Watch the next lecture video, Symmetry and Point Groups.
Symmetry and Point Groups
Chemistry 107 Lecture 02
Explanation: Instructions on how to assign molecules to their point group symmetry groups (Schonflies symbols)
Video: YouTube video: https://www.youtube.com/watch?v=hlL0LIKfVvw&index=2&list=PLqOZ6FD_RQ7kGnKLTbdwZ3IGVNXK43k7S, 50 minutes.
pdf Supporting Materials: Chemistry 107 lecture supplements: Point Group Assignments (2_Ch4_Symmetry Operations.pdf). Staggered ethane; high, low, D, C, and S symmetry groups, and decision tree for assigning Schonflies symbols.
pdf Supporting Materials: Chemistry 107 lecture supplements: More Point Group Assignments (3_Ch4_more Point Groups.pdf). PF5, diborane, 18-crown-6, a baseball and atomic orbitals symmetry assignments and properties of mathematical groups.
Test your understanding:
Molecular Structure & Schoenflies Symbols A (pdf) (solution)
Molecular Structure & Schoenflies Symbols B (pdf) (solution)
Proficiencies:
perform symmetry operations
classify molecules/ions by their Schoenflies symbols (point group symmetry labels)