Covalent Bonding IV Polyatomic Molecules

The VSEPR theory of the ammonia molecule starts with the nitrogen atom (2s22p3), to which is added the Is electrons from the three hydro- 

The ammonia molecule is a trigonal pyramid, belonging to the C3v point group. The 2s and 2p orbitals of the nitrogen atom and the Is orbital group combinations of the three hydrogen atoms transform, with respect to the C3v point group, as indicated in Table 6.1. 

Q Look up the transformation properties of the 2s and 2p orbitals of the nitrogen atom in the character tables of the C3v point group in Appendix 1 to confirm the content of Table 6.1. Carry out the procedure for classifying the Is orbitals of the three hydrogen atoms as group orbitals in the pyramidal molecule. 

A The results of estimating the number of the Is hydrogen ligand orbitals that are unaffected by the symmetry operations of the C3v point group are  

This representation of the group orbitals may be converted to its constituent irreducible representations by considering that it is 

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