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| A = symmetric to principle rotation |
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1 = symmetric to C2’s or σv (if no C2)
2 = antisymmetric . |
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g = symmetric to
inversion, u = antisymmetric. |
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Are used to match orbitals, e.g. x with
+ve and –ve directions matches px, xy with alternating signs in quadrants matches dxy.Rotational functions describe rotations, other motions of molecule. |
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| a molecular vibration is infrared active if a vibration changes the dipole moment. 3N-6 |
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| a set of points arranged so that each point has identical surroundings. In addition, a point lattice can be characterized in terms of three spatial dimensions: a, b, and c and three angles, alpha, beta and gamma. The lengths and angles are known as lattice parameters or unit cell parameters and a single cell constructed using these parameters is called the unit cell |
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