This same row of characters can be obtained by summing
the rows of characters for the A1’ and E’ representations in
the D3h character table. Thus, the three LGOs have a1’ and
e’ symmetries; recall that the e label designates a doubly
degenerate set of orbitals. We must now determine the wavefunction
for each LGO. Let the three H 1s orbitals in the H3
fragment in BH3 be 1, 2 and 3. The next step is to see how
1 is affected by each symmetry operation of the D3h point
group (Figure 4.16). For example, the C3 operation transforms
1 into 2, the C23
operation transforms 1 into 3,
and the three C2 operations, respectively, leave 1
unchanged, transform 1 into 2, and transform 1 into
3. The following row of characters gives the complete result:
This same row of characters can be obtained by summingthe rows of characters for the A1’ and E’ representations inthe D3h character table. Thus, the three LGOs have a1’ ande’ symmetries; recall that the e label designates a doublydegenerate set of orbitals. We must now determine the wavefunctionfor each LGO. Let the three H 1s orbitals in the H3fragment in BH3 be 1, 2 and 3. The next step is to see how1 is affected by each symmetry operation of the D3h pointgroup (Figure 4.16). For example, the C3 operation transforms1 into 2, the C23operation transforms 1 into 3,and the three C2 operations, respectively, leave 1unchanged, transform 1 into 2, and transform 1 into3. The following row of characters gives the complete result:
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