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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: Calculated > Geometry > Calculated geometry > One type of bond | |
ROMP2/3-21G
| 160 | |
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| 140 | |
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| 120 | |
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| 100 | |
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| 80 | |
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| 60 | |
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| 40 | |
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| 20 | |
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| 0 | |
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| 1.00 | 1.20 | 1.40 | 1.60 | 1.80 | 2.00 | 2.20 | 2.40 | 2.60 | 2.80 | 3.00 | 3.20 | 3.40 | ||||||||||||||||||||||||||||
| bond lengths (Å) | ||||||||||||||||||||||||||||||||||||||||
| Average bond length | Standard deviation |
|---|---|
| 1.106 | 0.148 |
| Species | Name | Bond Length (Å) | |
|---|---|---|---|
| Lowest value | C2H | Ethynyl radical | 1.064 |
| Highest value | C2H3+ | vinyl cation | 3.081 |
| Species | Name | Bond Length (Å) | Atom1 index | Atom2 index |
|---|---|---|---|---|
| CH | Methylidyne | 1.135 | 1 | 2 |
| CH2 | Methylene | 1.080 | 1 | 2 |
| 1.080 | 1 | 3 | ||
| CH2+ | methylene cation | 1.091 | 1 | 2 |
| 1.091 | 1 | 3 | ||
| CH3 | Methyl radical | 1.079 | 1 | 2 |
| 1.079 | 1 | 3 | ||
| 1.079 | 1 | 4 | ||
| C2H | Ethynyl radical | 1.064 | 1 | 3 |
| HCN+ | hydrogen cyanide cation | 1.088 | 1 | 2 |
| HCO- | formyl anion | 1.425 | 1 | 2 |
| HCO | Formyl radical | 1.116 | 1 | 2 |
| HCO+ | Formyl cation | 1.087 | 1 | 2 |
| C2H2+ | acetylene cation | 1.079 | 1 | 3 |
| 1.079 | 2 | 4 | ||
| H2CN | Dihydrogen cyanide radical | 1.093 | 1 | 3 |
| 1.093 | 1 | 4 | ||
| H2CN+ | hydrocyanonium cation | 1.122 | 1 | 3 |
| 1.122 | 1 | 4 | ||
| HCNH | methyleneazane | 1.098 | 1 | 3 |
| H2CO- | formaldehyde anion | 1.133 | 2 | 3 |
| 1.133 | 2 | 4 | ||
| H2CO+ | formaldehyde cation | 1.102 | 2 | 3 |
| 1.102 | 2 | 4 | ||
| CH2F | fluoromethyl radical | 1.080 | 1 | 3 |
| 1.080 | 1 | 4 | ||
| CH2Cl | chloromethyl radical | 1.077 | 1 | 3 |
| 1.077 | 1 | 4 | ||
| CH2Br | bromomethyl radical | 1.078 | 1 | 3 |
| 1.078 | 1 | 4 | ||
| C2H3 | vinyl | 1.082 | 1 | 3 |
| 1.091 | 2 | 4 | ||
| 1.087 | 2 | 5 | ||
| C2H3+ | vinyl cation | 1.266 | 1 | 2 |
| 1.082 | 1 | 3 | ||
| 1.104 | 2 | 4 | ||
| 3.081 | 3 | 5 | ||
| CH2NH+ | Methanimine cation | 1.098 | 1 | 3 |
| 1.094 | 1 | 4 | ||
| CH3O+ | Methoxy cation | 1.102 | 1 | 3 |
| 1.102 | 1 | 4 | ||
| 1.102 | 1 | 5 | ||
| CH2OH | Hydroxymethyl radical | 1.080 | 1 | 3 |
| 1.087 | 1 | 4 | ||
| CH3Cl+ | Methyl chloride cation | 1.103 | 1 | 3 |
| 1.090 | 1 | 4 | ||
| 1.090 | 1 | 5 | ||
| CH3Br | methyl bromide | 1.089 | 1 | 3 |
| 1.089 | 1 | 4 | ||
| 1.089 | 1 | 5 | ||
| C2H4+ | Ethylene cation | 1.088 | 1 | 3 |
| 1.088 | 1 | 4 | ||
| 1.088 | 2 | 5 | ||
| 1.088 | 2 | 6 | ||
| CH3OH- | Methyl alcohol anion | 1.137 | 1 | 3 |
| 1.136 | 1 | 4 | ||
| 1.136 | 1 | 5 | ||
| CH3OH+ | Methyl alcohol cation | 1.085 | 1 | 3 |
| 1.096 | 1 | 4 | ||
| 1.096 | 1 | 5 | ||
| CH3NH2+ | methyl amine cation | 1.103 | 1 | 3 |
| 1.091 | 1 | 4 | ||
| 1.091 | 1 | 5 | ||
| HCCN | cyanomethylene | 1.076 | 1 | 4 |
| HCOO | formate neutral radical | 1.099 | 1 | 2 |
| HFCO+ | formyl fluoride cation | 1.093 | 1 | 4 |
| CHF2 | difluoromethyl radical | 1.085 | 1 | 2 |
| HCCF+ | fluoroacetylene cation | 1.077 | 2 | 4 |
| CHFCl | Chlorofluoromethyl radical | 1.082 | 1 | 2 |
| CHBr2 | dibromomethyl radical | 1.084 | 1 | 2 |
| C3H3- | Propargyl anion | 1.089 | 1 | 4 |
| 1.089 | 1 | 5 | ||
| 1.088 | 3 | 6 | ||
| C3H3 | cyclopropenyl radical | 1.087 | 1 | 2 |
| 1.073 | 3 | 5 | ||
| 1.073 | 4 | 6 | ||
| C3H3+ | cyclopropenyl cation | 1.076 | 1 | 4 |
| 1.076 | 2 | 5 | ||
| 1.076 | 3 | 6 | ||
| CH3CN- | acetonitrile anion | 1.137 | 1 | 4 |
| 1.137 | 1 | 5 | ||
| 1.137 | 1 | 6 | ||
| HCNCH2+ | 2H-Azirine cation | 1.081 | 2 | 4 |
| 1.080 | 3 | 5 | ||
| 1.080 | 3 | 6 | ||
| CH3OO+ | methylperoxy cation | 1.086 | 1 | 4 |
| 1.093 | 1 | 5 | ||
| 1.093 | 1 | 6 | ||
| CH2CHO | Vinyloxy radical | 1.099 | 1 | 2 |
| 1.083 | 3 | 5 | ||
| 1.083 | 3 | 6 | ||
| CH2OOH | CH2OOH radical | 1.082 | 1 | 4 |
| 1.083 | 1 | 5 | ||
| CH2CHF | Ethene, fluoro- | 1.083 | 1 | 4 |
| 1.083 | 2 | 5 | ||
| 1.082 | 2 | 6 | ||
| CH3CHN | methylmethaniminyl radical | 1.096 | 1 | 4 |
| 1.093 | 2 | 5 | ||
| 1.095 | 2 | 6 | ||
| 1.095 | 2 | 7 | ||
| CH3CHO+ | acetaldehyde cation | 1.103 | 1 | 4 |
| 1.090 | 2 | 5 | ||
| 1.099 | 2 | 6 | ||
| 1.099 | 2 | 7 | ||
| CH3CHCH | 1-propenyl radical | 1.094 | 1 | 4 |
| 1.082 | 2 | 5 | ||
| 1.094 | 3 | 6 | ||
| 1.096 | 3 | 7 | ||
| 1.096 | 3 | 8 | ||
| CH3CH2O | Ethoxy radical | 1.095 | 1 | 4 |
| 1.094 | 1 | 5 | ||
| 1.094 | 1 | 6 | ||
| 1.098 | 2 | 7 | ||
| 1.098 | 2 | 8 | ||
| CH3CHOH | 1-hydroxy-ethyl radical | 1.090 | 1 | 4 |
| 1.094 | 2 | 5 | ||
| 1.094 | 2 | 6 | ||
| 1.100 | 2 | 7 | ||
| CH2CH2OH | 2-hydroxy ethyl radical | 1.099 | 2 | 5 |
| 1.099 | 2 | 6 | ||
| 1.082 | 3 | 7 | ||
| 1.082 | 3 | 8 | ||
| CH3OCH2 | methoxymethyl radical | 1.090 | 2 | 4 |
| 1.095 | 2 | 5 | ||
| 1.097 | 2 | 6 | ||
| 1.082 | 3 | 7 | ||
| 1.089 | 3 | 8 | ||
| CH3SCH3+ | dimethyl sulfide cation | 1.092 | 2 | 4 |
| 1.092 | 3 | 5 | ||
| 1.098 | 2 | 6 | ||
| 1.098 | 2 | 7 | ||
| 1.098 | 3 | 8 | ||
| 1.098 | 3 | 9 | ||
| CH3CHCH3 | Isopropyl radical | 1.085 | 1 | 4 |
| 1.097 | 2 | 5 | ||
| 1.097 | 3 | 6 | ||
| 1.102 | 2 | 7 | ||
| 1.095 | 2 | 8 | ||
| 1.102 | 3 | 9 | ||
| 1.095 | 3 | 10 | ||
| C3H7 | n-Propyl radical | 1.095 | 3 | 4 |
| 1.094 | 3 | 5 | ||
| 1.095 | 3 | 6 | ||
| 1.102 | 2 | 7 | ||
| 1.097 | 2 | 8 | ||
| 1.083 | 1 | 9 | ||
| 1.084 | 1 | 10 | ||
| C2H2O2 | Ethanedial | 1.101 | 1 | 3 |
| 1.101 | 2 | 4 | ||
| C3H3N+ | acrylonitrile cation | 1.090 | 3 | 4 |
| 1.089 | 5 | 6 | ||
| 1.087 | 5 | 7 | ||
| C2H4F2 | 1,2-difluoroethane | 1.092 | 1 | 5 |
| 1.092 | 1 | 6 | ||
| 1.092 | 2 | 7 | ||
| 1.092 | 2 | 8 | ||
| CH3COCH2 | Acetonyl radical | 1.083 | 3 | 5 |
| 1.083 | 3 | 6 | ||
| 1.092 | 4 | 7 | ||
| 1.096 | 4 | 8 | ||
| 1.096 | 4 | 9 | ||
| C2H5OO | ethylperoxy radical | 1.095 | 1 | 5 |
| 1.093 | 1 | 6 | ||
| 1.093 | 1 | 7 | ||
| 1.092 | 2 | 8 | ||
| 1.092 | 2 | 9 | ||
| CH3COCH3- | acetone anion | 1.100 | 3 | 5 |
| 1.100 | 4 | 6 | ||
| 1.117 | 3 | 7 | ||
| 1.104 | 3 | 8 | ||
| 1.117 | 4 | 9 | ||
| 1.104 | 4 | 10 | ||
| C3H3N2 | imidazolyl radical | 1.077 | 1 | 6 |
| 1.079 | 4 | 7 | ||
| 1.079 | 5 | 8 | ||
| C3H4N2 | 1H-Imidazole | 1.077 | 2 | 7 |
| 1.078 | 3 | 8 | ||
| 1.077 | 5 | 9 | ||
| C4H4N | pyrrolide radical | 1.081 | 2 | 6 |
| 1.081 | 3 | 7 | ||
| 1.080 | 4 | 8 | ||
| 1.080 | 5 | 9 | ||
| C6H5CHO | benzaldehyde | 1.106 | 7 | 9 |
| 1.088 | 2 | 10 | ||
| 1.087 | 3 | 11 | ||
| 1.087 | 4 | 12 | ||
| 1.087 | 5 | 13 | ||
| 1.090 | 6 | 14 |