|   | 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 | 
|---|---|---|---|---|
| H2CO | Formaldehyde | 116.1 | 115.6 | 0.6 | 
| CH4 | Methane | 109.5 | 109.5 | -0.0 | 
| C2H6 | Ethane | 108.0 | 107.7 | 0.3 | 
| C2H4 | Ethylene | 117.6 | 116.6 | 1.0 | 
| C3H6 | Cyclopropane | 114.5 | 114.3 | 0.2 | 
| CH3 | Methyl radical | 120.0 | 120.0 | -0.0 | 
| CH2 | Methylene | 135.5 | 131.8 | 3.7 | 
| CH2 | Methylene | 102.4 | 131.8 | -29.4 | 
QCISD(T)/6-31G** for aHCH
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|  | 6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
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|  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
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| -30 | -25 | -20 | -15 | -10 | -5 | 0 | 5 | 10 | 15 | 20 | 25 | 30 | ||||||||||||||||||||||||||||
| Angle difference calc. - exp. (degrees) | ||||||||||||||||||||||||||||||||||||||||
| Species | Name | Difference (degrees) | |
|---|---|---|---|
| Most negative difference | CH2 | Methylene | -29.4 | 
| Most positive difference | CH2 | Methylene | 3.7 |