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IV.C.1. (XIII.D.1.)

Compare vibrational frequencies in CCCBDB for C6H4O2 (parabenzoquinone)

MP2/6-31G**

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 Ag 3081 19 Ag 3062  
2 Ag 1613 -73 Ag 1686  
3 Ag 1554 -113 Ag 1667  
4 Ag 1106 -41 Ag 1147  
5 Ag 743 -27 Ag 770  
6 Ag 424 -19 Ag 443  
7 Au 907   Au    
8 Au 290   Au    
9 B1g 700 -45 B1g 745 B2G in ref
10 B1u 3063 1 B1u 3062 B2G in ref
11 B1u 1606 -62 B1u 1668 B2G in ref
12 B1u 1316 -38 B1u 1354 B2G in ref
13 B1u 897 -47 B1u 944 B2G in ref
14 B1u 716 -12 B1u 728 B2G in ref
15 B2g 907 -91 B2g 998 B3G in ref
16 B2g 619 -175 B2g 794 B3G in ref
17 B2g 159 -82 B2g 241 B3G in ref
18 B2u 3079 17 B2u 3062 B3U in ref
19 B2u 1550 -42 B2u 1592 B3U in ref
20 B2u 1274 -25 B2u 1299 B3U in ref
21 B2u 1034 -32 B2u 1066 B3U in ref
22 B2u 383 -25 B2u 408 B3U in ref
23 B3g 3064 20 B3g 3044 B1G in ref
24 B3g 1349 -25 B3g 1374 B1G in ref
25 B3g 1186 -25 B3g 1211 B1G in ref
26 B3g 569 -31 B3g 600 B1G in ref
27 B3g 420 -56 B3g 476 B1G in ref
28 B3u 820 -62 B3u 882 B1U in ref
29 B3u 468 -37 B3u 505 B1U in ref
30 B3u 83 -25 B3u 109 B1U in ref
The calculated vibrational frequencies were scaled by 0.9365

See section XIII.C.3 List or set vibrational scaling factors to change the scale factors used here.
See section III.B.3.c Calculate a vibrational scaling factor for a set of molecules to determine the least squares best scaling factor.
See section III.B.3.b List of vibrational scaling factors and their uncertainties for information on where the above scaling factor is from.