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Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology |
| You are here: Home > Geometry > Experimental > Same bond/angle many molecules OR Comparisons > Geometry > Bonds, angles > Same bond/angle many molecules | |
| Species | Name | Experimental Angle | Calculated Angle | Difference |
|---|---|---|---|---|
| C2H4 | Ethylene | 121.2 | 121.8 | -0.6 |
| C2H2 | Acetylene | 180.0 | 180.0 | 0.0 |
| C3H6 | Cyclopropane | 117.9 | 118.1 | -0.2 |
| CH3CH2CH2CH3 | Butane | 111.0 | 109.1 | 1.9 |
| C4H8 | cyclobutane | 119.9 | 118.2 | 1.7 |
| C4H8 | cyclobutane | 130.7 | 111.2 | 19.6 |
| C2H | Ethynyl radical | 180.0 | 180.0 | 0.0 |
| C2H3 | vinyl | 137.3 | 136.0 | 1.3 |
| C2H3 | vinyl | 121.5 | 122.0 | -0.5 |
| C3H5 | Allyl radical | 117.7 | 117.8 | -0.1 |
| C3H5 | Allyl radical | 120.9 | 121.7 | -0.8 |
QCISD(TQ)/6-31G* for aHCC
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| -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 | -0.8 |
| Most positive difference | C4H8 | cyclobutane | 19.6 |