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Symbols in the character table

Symbols in the first row of the character tables
Edescribes the degeneracy of the row (A and B= 1) (E=2) (T=3)
Cn2pi/n= number of turns in one circle on the main axis without changing the look of a molecule (rotation of the molecule)
Cn'2π/n= number of turns in one circle perpendicular to the main axis, without changing the structure of the molecule
Cn"2π/n= number of turns in one circle perpendicular to the Cn' and the main axis, without changing the structure
σ'reflection of the molecule perpendicular to the other sigma
σv (vertical)reflection of the molecule vertically compared to the horizontal highest fold axis.
σor d  (horizontal)reflection of the molecule horizontally compared to the horizontal highest fold axis.
iInversion of the molecule from the center 
Snrotation of 2π/n and then reflected in a plane perpendicular to rotation axis.
#Cnthe # stands for the number of irreducible representation for the Cn
the # stands for the number irreducible representations for the sigmas.
the number in superscriptin the same rotation there is another rotation, for instance Oh has 3C2=C42
 other useful definitions
 (Rx,Ry) the ( , ) means they are the same and can be counted once.
x2+y2, z2 without ( , ) means they are different and can be counted twice.
author

DESH DEEPAK A P S CHAUHAN

M.Sc. CHEMISTRY!

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