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Relative enthalpies of isomers - Comparison of 0K enthalpies (kJ mol-1)

Isomers of C8H10

17 10 10 15 39
index Species CAS number Name Relative experimental enthalpy (kJ mol-1) sketch
a C6H5CH2CH3 100414 Ethylbenzene   sketch of Ethylbenzene
b CH3C6H4CH3 106423 paraxylene   sketch of paraxylene
c CH3C6H4CH3 108383 meta-xylene   sketch of meta-xylene
The calculated enthalpies include the calculated and scaled vibrational zero-point energy.
Methods with predefined basis sets

Methods with standard basis sets
3-21G 3-21G* 6-31G* 6-31+G** TZVP Def2TZVPP cc-pVDZ cc-pVTZ aug-cc-pVTZ
hartree fock HF     0.0 a
-11.1 c
  0.0 a
-9.8 c
0.0 a
-10.2 c
     
density functional BLYP     0.0 a
-16.0 b
           
B3LYP         0.0 a
-13.0 c
       
M06-2X   0.0 a
-9.6 b
-5.3 c
             
PBEPBE           0.0 a
-15.6 b
-15.7 c
     
HSEh1PBE     0.0 a
-15.7 c
0.0 a
-14.5 c
      0.0 a
-15.0 c
 
wB97X-D       0.0 a
-11.4 b
0.0 a
-11.0 b
  0.0 a
-11.4 b
  0.0 a
-14.7 c
B97D3 0.0 a
-8.7 c
              0.0 a
-14.3 b
-14.6 c
3-21G 3-21G* 6-31G* 6-31+G** TZVP Def2TZVPP cc-pVDZ cc-pVTZ aug-cc-pVTZ
Moller Plesset perturbation MP2     0.0 a
-15.1 c
    0.0 a
-12.6 b
     
B2PLYP     0.0 a
-14.6 c
           
3-21G 3-21G* 6-31G* 6-31+G** TZVP Def2TZVPP cc-pVDZ cc-pVTZ aug-cc-pVTZ
NC = not calculated
For descriptions of the methods (AM1, HF, MP2, ...) and basis sets (3-21G, 3-21G*, 6-31G, ...) see the glossary in section I.C. Predefined means the basis set used is determined by the method.
gaw refers to the group additivity method implemeted in the NIST Chemistry Webbook.
See section Calculated; Vibrations; Scale Factors; Scale factors to list vibrational scaling factors.
See section Calculated; Vibrations; Scale Factors; Calculate a scale factor to calculate a vibrational scaling factor for a given set of molecules.