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Iatrogenic

Electronic States of Molecules,lem is to characterize the orbitals of a molecule as the basis functions for the irreducible representations of the molecular symmetry group and to construct such orbitals in the form of linear combinations of atomic orbitals (LCAO). This is equivalent to reducing a representation based on the atomi

接合

Molecular Vibrations,les allows classification of normal vibration modes according to irreducible representations of the symmetry group of the molecule without explicit knowledge of the force constants. In this chapter, we begin with the elementary theory of normal vibration modes, then study how group representation th

搏斗

Space Groups, that purpose. In microscopic investigation of crystals, however, periodicity (translational symmetry) of the crystal structure plays an important part. Space groups describe the full microscopic symmetry of crystals. In this chapter, we discuss various properties and the notation of space groups an

Harbor

Electronic States in Crystals,e crystal lattice. In this chapter, we investigate how the crystal symmetry influences the energy spectra and wavefunctions (Bloch functions) of electrons. Selection rules associated with various electronic processes are also discussed. Finally, Frenkel excitons in molecular crystals are considered,

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