![]() |
Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology |
You are here: Comparisons > Energy > Similar molecules > Isomers OR FAQ Help > List > Similar molecules > Isomers |
index | Species | CAS number | Name | Relative experimental enthalpy (kJ mol-1) | sketch |
---|---|---|---|---|---|
a | C6H12O2 | 142621 | Hexanoic acid | ![]() |
|
b | C6H12O2 | 598981 | Methyl pivalate | ![]() |
composite | CBS-Q | 0.0 a 20.0 b |
---|
STO-3G | 3-21G | 3-21G* | 6-31G | 6-31G* | 6-31G** | 6-31+G** | 6-311G* | 6-311G** | 6-31G(2df,p) | TZVP | cc-pVDZ | cc-pVTZ | cc-pVQZ | aug-cc-pVDZ | aug-cc-pVTZ | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
hartree fock | HF | 0.0 a -6.5 b |
0.0 a -5.1 b |
0.0 a -5.1 b |
0.0 a 29.0 b |
0.0 a 35.7 b |
0.0 a 38.5 b |
0.0 a 25.0 b |
0.0 a 36.8 b |
0.0 a 33.7 b |
0.0 a 37.2 b |
0.0 a 38.1 b |
0.0 a 39.4 b |
0.0 a 43.8 b |
0.0 a 39.1 b |
||
ROHF | 0.0 a -5.1 b |
0.0 a -5.1 b |
0.0 a 29.0 b |
0.0 a 24.1 b |
0.0 a 35.7 b |
0.0 a 38.5 b |
0.0 a 25.0 b |
0.0 a 33.7 b |
0.0 a 37.2 b |
0.0 a 38.1 b |
0.0 a 43.8 b |
0.0 a 39.1 b |
|||||
density functional | BLYP | 0.0 a 15.7 b |
0.0 a 13.8 b |
0.0 a 23.6 b |
0.0 a 33.5 b |
0.0 a 20.3 b |
0.0 a 30.4 b |
0.0 a 20.8 b |
0.0 a 29.0 b |
0.0 a 33.4 b |
|||||||
B1B95 | 0.0 a -13.3 b |
0.0 a -9.3 b |
0.0 a -9.3 b |
0.0 a 18.4 b |
0.0 a 28.9 b |
0.0 a 32.5 b |
0.0 a 26.8 b |
0.0 a 36.4 b |
0.0 a 41.2 b |
0.0 a 36.5 b |
|||||||
B3LYP | 0.0 a -8.2 b |
0.0 a -8.2 b |
0.0 a 20.2 b |
0.0 a 16.7 b |
0.0 a 21.8 b |
0.0 a 32.5 b |
0.0 a 24.6 b |
0.0 a 36.9 b |
0.0 a 41.3 b |
0.0 a 37.2 b |
|||||||
B3PW91 | 0.0 a -11.7 b |
0.0 a -0.1 b |
0.0 a -0.1 b |
0.0 a 26.5 b |
0.0 a 23.0 b |
0.0 a 33.6 b |
0.0 a 39.8 b |
0.0 a 26.3 b |
0.0 a 37.4 b |
0.0 a 31.6 b |
0.0 a 37.1 b |
0.0 a 40.1 b |
|||||
mPW1PW91 | 0.0 a -1.9 b |
0.0 a -1.9 b |
0.0 a 25.7 b |
0.0 a 22.1 b |
0.0 a 32.8 b |
0.0 a 39.0 b |
0.0 a 25.1 b |
0.0 a 36.4 b |
0.0 a 31.0 b |
0.0 a 36.1 b |
0.0 a 39.4 b |
||||||
M06-2X | 0.0 a -20.2 b |
||||||||||||||||
PBEPBE | 0.0 a 20.8 b |
0.0 a 23.1 b |
0.0 a 33.7 b |
0.0 a 38.9 b |
|||||||||||||
TPSSh | 0.0 a 16.7 b |
||||||||||||||||
wB97X-D | 0.0 a 35.5 b |
||||||||||||||||
B97D3 | 0.0 a 11.9 b |
0.0 a 27.2 b |
0.0 a 31.0 b |
0.0 a 31.8 b |
|||||||||||||
STO-3G | 3-21G | 3-21G* | 6-31G | 6-31G* | 6-31G** | 6-31+G** | 6-311G* | 6-311G** | 6-31G(2df,p) | TZVP | cc-pVDZ | cc-pVTZ | cc-pVQZ | aug-cc-pVDZ | aug-cc-pVTZ | ||
Moller Plesset perturbation | MP2 | 0.0 a -18.1 b |
0.0 a -15.4 b |
0.0 a 10.3 b |
0.0 a 18.8 b |
0.0 a 20.8 b |
0.0 a 11.0 b |
0.0 a 25.8 b |
0.0 a 25.7 b |
||||||||
MP2=FULL | 0.0 a -18.0 b |
0.0 a -15.8 b |
0.0 a -15.8 b |
0.0 a 15.1 b |
0.0 a 8.9 b |
0.0 a 10.7 b |
0.0 a 7.8 b |
0.0 a 24.8 b |
0.0 a 22.8 b |
||||||||
MP3 | 0.0 a 19.7 b |
||||||||||||||||
Configuration interaction | CID | 0.0 a -8.9 b |
0.0 a -8.9 b |
0.0 a 23.0 b |
0.0 a 18.7 b |
0.0 a 19.7 b |
|||||||||||
CISD | 0.0 a -9.8 b |
0.0 a -9.8 b |
0.0 a 21.9 b |
0.0 a 18.0 b |
0.0 a 19.2 b |
||||||||||||
Coupled Cluster | CCSD | 0.0 a 16.0 b |
|||||||||||||||
STO-3G | 3-21G | 3-21G* | 6-31G | 6-31G* | 6-31G** | 6-31+G** | 6-311G* | 6-311G** | 6-31G(2df,p) | TZVP | cc-pVDZ | cc-pVTZ | cc-pVQZ | aug-cc-pVDZ | aug-cc-pVTZ |
CEP-31G | CEP-31G* | CEP-121G | CEP-121G* | LANL2DZ | SDD | cc-pVTZ-PP | aug-cc-pVTZ-PP | Def2TZVPP | ||
---|---|---|---|---|---|---|---|---|---|---|
hartree fock | HF | 0.0 a 26.7 b |
0.0 a 19.7 b |
0.0 a 32.2 b |
0.0 a 26.1 b |
0.0 a 32.0 b |
0.0 a 32.0 b |
0.0 a 39.8 b |
||
density functional | B3LYP | 0.0 a 18.9 b |
0.0 a 15.2 b |
0.0 a 37.3 b |
||||||
PBEPBE | 0.0 a 39.0 b |
|||||||||
Moller Plesset perturbation | MP2 | 0.0 a 10.0 b |
0.0 a 5.5 b |
0.0 a 8.8 b |
0.0 a 6.0 b |
0.0 a 13.1 b |
0.0 a 12.8 b |
0.0 a 26.9 b |