return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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Compare Angles

18 10 26 16 25

Click on entry for experimental details.
Species Name Experimental Angle Calculated Angle Difference
C2H2 Acetylene 180.0 180.0 0.0
C4H8 cyclobutane 119.9 118.4 1.5
C4H8 cyclobutane 130.7 110.8 19.9
C2H Ethynyl radical 180.0 180.0 0.0
C2H3 vinyl 121.5 121.3 0.2
C2H3 vinyl 137.3 135.8 1.5
C3H5 Allyl radical 117.7 117.9 -0.2
C3H5 Allyl radical 120.9 121.4 -0.5
C3H6 Cyclopropane 117.9 117.9 0.0
C2H4 Ethylene 121.2 121.5 -0.3

QCISD(TQ)/cc-pVDZ for aHCC

Histogram of angle differences (in degrees) vs number of species


Differences greater than 22 are in the 22 bin. Differences less than -2 are in the -2 bin.

histogram chart 10
histogram chart 8
histogram chart 6
histogram chart 4 histogram chart
histogram chart 2 histogram chart
histogram chart 0 histogram chart histogram chart histogram chart
-2 0 2 4 6 8 10 12 14 16 18 20 22
Angle difference calc. - exp. (degrees)

  Species Name Difference (degrees)
Most negative difference C3H5 Allyl radical -0.5
Most positive difference C4H8 cyclobutane 19.9