National Institute of Standards and Technology
Computational Chemistry Comparison and Benchmark DataBase
Release 18October 2016
NIST Standard Reference Database 101
IIntroduction
IIExperimental data
IIICalculated data
IVData comparisons
VCost comparisons
VIInput and output files
VIITutorials and Units
VIIILinks to other sites
IXFeedback
XOlder CCCBDB versions
XIIGeometries
XIII Vibrations
XIVReaction data
XVEntropy data
XVIBibliographic data
XVIIIon data
XVIIIBad calculations
XIXIndex of properties
XXH-bond dimers
XXIOddities

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

Compare vibrational frequencies in CCCBDB for H2CCCCH2 (Butatriene)

mPW1PW91/aug-cc-pVDZ

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 Ag 3021 26 Ag 2995  
2 Ag 2141 62 Ag 2079  
3 Ag 1390 -40 Ag 1430  
4 Ag 875 -3 Ag 878  
5 Au 738 2 Au 736  
6 B1u 3024 30 B1u 2994  
7 B1u 1631 23 B1u 1608  
8 B1u 1337 -33 B1u 1370  
9 B2g 856 -22 B2g 878 assumed under nu4
10 B2g 439 -105 B2g 544 moved from nu9 moved from nu9
11 B2u 3109 29 B2u 3080  
12 B2u 983 -77 B2u 1060  
13 B2u 206 -9 B2u 215  
14 B3g 3109 50 B3g 3059  
15 B3g 939   B3g   663 questionable
16 B3g 174 -156 B3g 330  
17 B3u 862 8 B3u 854  
18 B3u 203 -12 B3u 215 asssumed from nu13
The calculated vibrational frequencies were scaled by 0.9583

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.