Representations, Character Tables and Vibrational Analysis
Watch the lecture videos below.
Representations and and Character Tables
Chemistry 107 Lecture 03
and
Character Tables and One Application of Symmetry
Chemistry 107 Lecture 04
Explanation: Reviewed point group assignments, properties of mathematical groups, transform matrices, and representations of groups.
Video 1: YouTube video: https://www.youtube.com/watch?v=B0DFcG_SgGo&index=4&list=PLqOZ6FD_RQ7kGnKLTbdwZ3IGVNXK43k7S, 49 minutes.
Explanation: Irreducible representations, aspects of character tables, analysis of ammonia (C3v), and chirality.
Video 2: YouTube video: https://www.youtube.com/watch?v=O_KhEpXe6uE&list=PLqOZ6FD_RQ7kGnKLTbdwZ3IGVNXK43k7S&index=5, 49 minutes
pdf Supporting Materials: Chemistry 107 lecture supplements: Representations, Character Tables, and One Application of Symmetry (4_Ch4_Character Tables.pdf).
Test your understanding:
Reducible Representations Sigma Hybrids Quiz - "SeF4" (pdf) (solution)
Reducible Representations Hybrids Quiz - "carbonate" (pdf) (solution)
Watch the lecture video below.
Vibrational Analysis
Chemistry 107 Lecture 05
Explanation: Subjects presented are: IR and Raman vibrational spectroscopy, degrees of freedom, generation of reducible representation and reduction to irreducible representations. Vibrational analysis performed on N2O4 with visualization of the vibrations and an analysis of mer- and face-MCl3(CO)3.
Video: YouTube video: https://www.youtube.com/watch?v=zgqlLx1kWns&index=6&list=PLqOZ6FD_RQ7kGnKLTbdwZ3IGVNXK43k7S, 47 minutes.
pdf Supporting Materials: Chemistry 107 lecture supplements: Vibrational Analysis (5_Ch4_Vibrational Analysis.pdf).
Test your understanding:
Vibrational Analysis Quiz - "VibrationalAnalysis_CH2O" (pdf) (solution)
Vibrational Analysis Quiz - "VibrationalAnalysis_PtCl4" (pdf) (solution)
Vibrational Analysis Quiz - "VibrationalAnalysis_MCO5" (pdf) (solution)
Worksheet:
Computational Exercises: Visualizing molecular vibrations of sulfur hexafluoride (pdf) (solution) and methane (pdf) (solution)
Spartan files Sulfur Hexafluoride (DFT) and Methane (DFT)
Proficiencies:
perform vibrational analyses of molecules/ions
assignment irreducible representations to molecular vibrations
diagram cartoons depicting individual molecular vibrations and their irreducible representations