|   | Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology | 
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| Species | Name | Experimental Angle | Calculated Angle | Difference | 
|---|---|---|---|---|
| HCOOH | Formic acid | 124.9 | 125.3 | -0.4 | 
| CH3COOH | Acetic acid | 123.0 | 122.6 | 0.4 | 
| CH3OCHO | methyl formate | 125.9 | 126.2 | -0.3 | 
| C4H2O3 | Maleic Anhydride | 122.6 | 122.5 | 0.1 | 
| C3H8O2 | Methane, dimethoxy- | 114.3 | 105.5 | 8.8 | 
| C3H6O3 | 1,3,5-Trioxane | 112.0 | 111.9 | 0.1 | 
| CO2 | Carbon dioxide | 180.0 | 180.0 | 0.0 | 
| C4H8O2 | Ethyl acetate | 124.0 | 123.8 | 0.2 | 
| C2H2O4 | Oxalic Acid | 125.0 | 125.5 | -0.5 | 
| CH2O2 | Dioxirane | 66.2 | 66.3 | -0.1 | 
| C4H8O2 | 1,3-Dioxane | 115.0 | 113.4 | 1.6 | 
| C3H2O3 | vinylene carbonate | 108.8 | 107.6 | 1.2 | 
| HOCO+ | Hydrocarboxyl cation | 174.4 | 172.9 | 1.5 | 
| C2H4O4 | Formic acid dimer | 126.2 | 127.2 | -1.0 | 
BLYP/6-31G** for aOCO
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| Angle difference calc. - exp. (degrees) | ||||||||||||||||||||||||||||||||||||||||
| Species | Name | Difference (degrees) | |
|---|---|---|---|
| Most negative difference | C2H4O4 | Formic acid dimer | -1.0 | 
| Most positive difference | C3H8O2 | Methane, dimethoxy- | 8.8 |