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Inorganic Final Exam

Terms in this set (58)

There is a character table corresponding to every point group. The table contains all of the symmetry species (Γ) and all of the symmetry operators. In the table are values corresponding to how they transform under the operations.
This is the character table for the C4v point group. The numerical elements in the body of the table are the characters, χ, and these are what tell us how the symmetry species transform under the operation. A value of 1 means it is unchanged, a value of -1 means it changes sign, 0 means it undergoes a more complicated change (higher math, and such). The letters in the column directly to the right of the main body are translations, rotations, and components of dipole moments (s and p orbitals) which are relevant to IR activity. In the column to the right of those are the quadratic functions (d orbitals) which are of relevance to Raman activity.
The letter A in the symmetry species column means that it is symmetric with respect to rotation about the principal axis. B means that it is inverted with respect to rotation about the principal axis. If it is labeled A1, then it is symmetric with respect to all symmetry operators. The subscript one means that it is symmetric with respect to reflection in the principal vertical plane, the subscript two means it is inverted with respect to reflection in the principal vertical plane. If the letter E is used for a symmetry species, it is a degenerate species, and the number of degenerate orbitals is given under the identity operator.