Symmetry in nature. Structural regularity in Chemistry, Elements of group theory. Group theory and quantum mechanics. Symmetry principles in structural and bonding theories of molecules. Molecular geometry; Jahn-Teller and Renner effects; dipole moments. Conservation of orbital symmetry in pericyclic reactions. Symmetry in the interaction of radiation with matter. Transition probability and selection rules; normal modes of vibration; symmetry in electronic spectra; symmetry rules governing the relation of polarisability, accidental degeneracy and hidden symmetry; superselection rules. Symmetry in nanoscience.

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