Info

/""axial 80+20/

5e

2C

8,

8^

3C

4c

8,

80+20j

8«,

8,

15,

16,

8,

8,

15,

16,

"One A2u mode corresponding to translations of the center of mass of the free molecule along the fivefold axis and one Alg mode corresponding to rotations of the free molecule about the fivefold axis have been subtracted.

6One Eiu mode corresponding to translations of the center of mass of the free molecule normal to the fivefold axis and one Elg mode corresponding to rotations of the free molecule about axes normal to the fivefold axis have been subtracted.

cThe number of times an irreducible representation F, occurs for C^'20j and CJ^oy is given by symbols nc, nd, and which, respectively, denote n + j, n + 2j, and n + 4j, where n is an integer. For example, 5C, 8d, and 15e, respectively, denote 5 4- j, 8 + 2j, and 15 + 4j.

Table 4.24

The D5d irreducible representations (SI) together with the number of distinct eigenvalues (AT„) and the corresponding degeneracies g of the normal modes of the C80 molecule. The symbols and N™!' denote the number of distinct eigenvalues associated with the "belt" and "cap" modes, respectively, for each irreducible representation.

m

¿ybcii

jycap

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