IV.A.4. (XIV.F.) 
Relative enthalpies of isomers  Comparison of 0K enthalpies (kJ mol^{1})
Isomers of C_{2}H_{2}F_{2}
2015 06 30 15:39index  Species  CAS number  Name  Relative experimental enthalpy (kJ mol^{1})  sketch 

a  CH_{2}CF_{2}  75387  Ethene, 1,1difluoro  0.0  
b  C_{2}H_{2}F_{2}  1630779  Ethene, 1,2difluoro, (Z)  
c  C_{2}H_{2}F_{2}  1630780  Ethene, 1,2difluoro, (E) 
composite  G1  0.0 a 41.5 b 

G2MP2  0.0 a 41.0 b 

G2  0.0 a 41.8 b 43.8 c 

G3  0.0 a 42.6 b 44.2 c 

G3B3  0.0 a 41.4 b 43.6 c 

G3MP2  0.0 a 41.9 b 

CBSQ  0.0 a 44.5 b 44.6 c 
STO3G  321G  321G*  631G  631G*  631G**  631+G**  6311G*  6311G**  631G(2df,p)  6311+G(3df,2p)  TZVP  ccpVDZ  ccpVTZ  augccpVDZ  augccpVTZ  ccpV(T+d)Z  

hartree fock  HF  0.0 a 40.7 b 38.6 c 
0.0 a 55.2 b 48.2 c 
0.0 a 55.2 b 48.2 c 
0.0 a 33.4 b 27.0 c 
0.0 a 50.5 b 48.3 c 
0.0 a 49.8 b 47.6 c 
0.0 a 39.4 b 40.6 c 
0.0 a 47.9 b 46.8 c 
0.0 a 47.0 b 45.8 c 
0.0 a 53.1 b 52.8 c 
0.0 a 42.3 b 45.8 c 
0.0 a 40.9 b 42.3 c 
0.0 a 49.0 b 47.0 c 
0.0 a 45.6 b 46.9 c 
0.0 a 37.9 b 40.8 c 
0.0 a 41.6 b 45.0 c 
0.0 a 45.6 b 
density functional  LSDA  0.0 a 49.3 b 49.2 c 
0.0 a 62.1 b 59.8 c 
0.0 a 62.1 b 59.8 c 
0.0 a 46.0 b 44.0 c 
0.0 a 56.2 b 56.3 c 
0.0 a 55.9 b 56.0 c 
0.0 a 44.6 b 47.3 c 
0.0 a 54.6 b 54.9 c 
0.0 a 54.1 b 54.3 c 
0.0 a 57.8 b 59.0 c 
0.0 a 56.1 b 55.5 c 
0.0 a 50.7 b 52.8 c 
0.0 a 43.7 b 47.8 c 
0.0 a 50.7 b 52.8 c 

SVWN  0.0 a 62.1 b 59.8 c 
0.0 a 56.2 b 56.3 c 
0.0 a 44.6 b 47.3 c 
0.0 a 46.7 b 49.3 c 

BLYP  0.0 a 43.9 b 43.4 c 
0.0 a 51.2 b 49.2 c 
0.0 a 51.2 b 49.2 c 
0.0 a 36.3 b 33.7 c 
0.0 a 45.2 b 44.9 c 
0.0 a 44.9 b 44.6 c 
0.0 a 33.9 b 35.4 c 
0.0 a 43.7 b 43.3 c 
0.0 a 43.1 b 42.5 c 
0.0 a 47.2 b 48.0 c 
0.0 a 44.9 b 44.0 c 
0.0 a 40.1 b 41.3 c 
0.0 a 40.1 b 

B1B95  0.0 a 43.8 b 43.5 c 
0.0 a 55.6 b 52.0 c 
0.0 a 55.6 b 52.0 c 
0.0 a 38.4 b 35.0 c 
0.0 a 39.5 b 38.8 c 
0.0 a 50.4 b 49.7 c 
0.0 a 39.7 b 41.5 c 
0.0 a 48.6 b 48.3 c 
0.0 a 48.0 b 47.6 c 
0.0 a 50.1 b 49.1 c 
0.0 a 33.0 b 34.5 c 
0.0 a 41.3 b 
0.0 a 33.0 b 

B3LYP  0.0 a 42.9 b 42.3 c 
0.0 a 53.4 b 50.1 c 
0.0 a 53.4 b 50.1 c 
0.0 a 36.5 b 33.1 c 
0.0 a 47.6 b 46.9 c 
0.0 a 47.2 b 46.5 c 
0.0 a 36.1 b 37.6 c 
0.0 a 45.7 b 45.1 c 
0.0 a 45.0 b 44.3 c 
0.0 a 49.6 b 50.2 c 
0.0 a 38.1 b 39.7 c 
0.0 a 47.0 b 45.9 c 
0.0 a 42.4 b 43.6 c 
0.0 a 35.1 b 38.1 c 
0.0 a 40.7 c 
0.0 a 42.4 b 43.6 c 

B3LYPultrafine  0.0 a 47.7 b 46.9 c 
0.0 a 37.6 b 

B3PW91  0.0 a 44.1 b 43.8 c 
0.0 a 55.5 b 52.3 c 
0.0 a 55.5 b 52.3 c 
0.0 a 38.3 b 35.0 c 
0.0 a 50.3 b 49.8 c 
0.0 a 49.9 b 49.3 c 
0.0 a 39.2 b 41.1 c 
0.0 a 47.9 b 47.8 c 
0.0 a 47.3 b 47.1 c 
0.0 a 51.7 b 52.7 c 
0.0 a 49.2 b 48.4 c 
0.0 a 44.8 b 46.5 c 
0.0 a 44.8 b 

mPW1PW91  0.0 a 44.0 b 43.5 c 
0.0 a 51.6 b 48.1 c 
0.0 a 56.1 b 52.6 c 
0.0 a 38.5 b 35.0 c 
0.0 a 47.0 b 46.3 c 
0.0 a 46.5 b 45.9 c 
0.0 a 35.9 b 37.8 c 
0.0 a 44.6 b 44.5 c 
0.0 a 48.0 b 47.7 c 
0.0 a 52.5 b 53.4 c 
0.0 a 45.9 b 45.0 c 
0.0 a 41.7 b 43.4 c 
0.0 a 41.7 b 

M062X  0.0 a 53.1 b 51.0 c 
0.0 a 53.1 b 51.0 c 

PBEPBE  0.0 a 46.1 b 45.9 c 
0.0 a 55.0 b 53.2 c 
0.0 a 55.0 b 53.2 c 
0.0 a 40.0 b 37.8 c 
0.0 a 49.9 b 49.9 c 
0.0 a 49.5 b 49.6 c 
0.0 a 38.7 b 41.0 c 
0.0 a 47.9 b 48.1 c 
0.0 a 47.4 b 47.4 c 
0.0 a 51.0 b 52.4 c 
NC NC 
0.0 a 44.5 b 46.5 c 
0.0 a 44.5 b 

PBE1PBE  0.0 a 52.1 b 51.5 c 

HSEh1PBE  0.0 a 56.7 b 53.3 c 
0.0 a 51.6 b 51.0 c 
0.0 a 40.3 b 42.3 c 
0.0 a 46.1 b 47.9 c 

TPSSh  0.0 a 47.4 b 47.0 c 
0.0 a 36.1 b 38.0 c 
0.0 a 48.4 b 49.6 c 
0.0 a 41.5 b 43.3 c 

wB97XD  0.0 a 56.5 b 52.5 c 
0.0 a 51.1 b 49.9 c 
0.0 a 39.6 b 41.0 c 
0.0 a 47.9 b 47.1 c 
0.0 a 40.3 b 42.8 c 
0.0 a 39.6 b 41.0 c 
0.0 a 45.4 b 46.7 c 
0.0 a 41.2 b 44.3 c 

B97D3  0.0 a 52.2 b 50.2 c 
0.0 a 47.1 b 47.1 c 
0.0 a 44.4 b 44.5 c 
0.0 a 37.7 b 41.4 c 

STO3G  321G  321G*  631G  631G*  631G**  631+G**  6311G*  6311G**  631G(2df,p)  6311+G(3df,2p)  TZVP  ccpVDZ  ccpVTZ  augccpVDZ  augccpVTZ  ccpV(T+d)Z  
Moller Plesset perturbation  MP2  0.0 a 40.4 b 39.1 c 
0.0 a 57.6 b 53.6 c 
0.0 a 57.6 b 53.6 c 
0.0 a 36.8 b 32.1 c 
0.0 a 51.6 b 50.1 c 
0.0 a 51.5 b 50.3 c 
0.0 a 52.6 b 52.3 c 
0.0 a 51.2 b 51.0 c 
0.0 a 57.8 b 58.0 c 
0.0 a 43.0 b 44.9 c 
0.0 a 53.6 b 53.0 c 
0.0 a 48.4 b 
0.0 a 39.3 b 42.8 c 
0.0 a 43.1 b 

MP2=FULL  NC NC 
0.0 a 57.7 b 53.6 c 
NC NC 
NC NC 
0.0 a 52.2 b 50.7 c 
0.0 a 52.1 b 51.0 c 
0.0 a 39.6 b 41.0 c 
0.0 a 53.0 b 52.7 c 
0.0 a 51.5 b 51.3 c 
0.0 a 59.6 b 60.3 c 
0.0 a 53.9 b 53.2 c 
0.0 a 48.9 b 50.8 c 

MP3  0.0 a 1624.9 b 45.8 c 

MP3=FULL  0.0 a 48.8 b 46.5 c 
0.0 a 37.4 b 37.8 c 

MP4  NC NC 
0.0 a 47.7 b 46.2 c 

B2PLYP  0.0 a 49.1 b 48.1 c 
0.0 a 44.3 b 45.8 c 

B2PLYP=FULLultrafine  0.0 a 48.7 b 47.4 c 

Configuration interaction  CID  NC NC 
NC NC 
NC NC 
0.0 a 49.5 b 47.3 c 
NC NC 

CISD  NC NC 
NC NC 
NC NC 
NC NC 
NC NC 

STO3G  321G  321G*  631G  631G*  631G**  631+G**  6311G*  6311G**  631G(2df,p)  6311+G(3df,2p)  TZVP  ccpVDZ  ccpVTZ  augccpVDZ  augccpVTZ  ccpV(T+d)Z  
Quadratic configuration interaction  QCISD  NC NC 
0.0 a 52.4 b 47.8 c 
NC NC 
NC NC 
0.0 a 46.9 b 44.8 c 
0.0 a 46.2 b 44.5 c 
0.0 a 34.8 b 35.3 c 
0.0 a 47.8 b 46.9 c 
0.0 a 45.8 b 45.1 c 
0.0 a 52.9 b 52.5 c 
NC NC 
0.0 a 44.0 b 45.4 c 
NC NC 

QCISD(T)  NC NC 
NC NC 

Coupled Cluster  CCD  NC NC 
NC NC 
NC NC 
NC NC 
0.0 a 47.2 b 44.8 c 
NC NC 
0.0 a 35.6 b 35.8 c 
NC NC 
NC NC 
NC NC 
0.0 a 48.8 b 47.3 c 
0.0 a 44.5 b 45.7 c 

CCSD  NC NC 

CCSD(T)  0.0 a 47.4 b 45.2 c 
NC NC 

STO3G  321G  321G*  631G  631G*  631G**  631+G**  6311G*  6311G**  631G(2df,p)  6311+G(3df,2p)  TZVP  ccpVDZ  ccpVTZ  augccpVDZ  augccpVTZ  ccpV(T+d)Z 
CEP31G  CEP31G*  CEP121G  CEP121G*  LANL2DZ  SDD  

hartree fock  HF  0.0 a 17.2 b 12.8 c 
0.0 a 36.7 b 36.9 c 
0.0 a 20.9 b 16.8 c 
0.0 a 39.8 b 40.1 c 
0.0 a 24.2 b 18.9 c 
0.0 a 24.6 b 19.2 c 
density functional  B1B95  0.0 a 26.4 b 24.0 c 
0.0 a 41.3 b 42.1 c 

B3LYP  0.0 a 23.4 b 20.5 c 
0.0 a 37.1 b 37.7 c 
0.0 a 23.8 b 21.1 c 
0.0 a 37.3 b 37.9 c 
0.0 a 29.4 b 26.1 c 
0.0 a 29.8 b 26.6 c 

Moller Plesset perturbation  MP2  0.0 a 20.8 b 16.8 c 
0.0 a 39.7 b 40.2 c 
0.0 a 23.1 b 19.4 c 
0.0 a 41.1 b 41.6 c 
0.0 a 27.3 b 22.7 c 
0.0 a 27.6 b 23.0 c 
ccpVTZ  augccpVTZ  ccpV(T+d)Z  

Moller Plesset perturbation  MP2FC// MP2FC/631G*  0.0 a 42.9 b 

Coupled Cluster  CCSD(T)//B3LYP/631G(2df,p)  0.0 a 44.1 b 
0.0 a 44.1 b 

CCSD// MP2FC/631G*  0.0 a 39.6 b 

CCSD(T)// MP2FC/631G*  0.0 a 39.8 b 
For descriptions of the methods (AM1, HF, MP2, ...) and basis sets (321G, 321G*, 631G, ...) 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 III.C.1 List or set vibrational scaling factors
to change the scale factors used here.
See section III.C.2
Calculate a vibrational scaling factor for a given set of molecules
to determine the least squares best scaling factor.