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IV.A.4. (XIV.F.)

Relative enthalpies of isomers - Comparison of 298.15K enthalpies (kJ mol-1)

Isomers of C4H9Cl

index Species CAS number Name Relative experimental enthalpy (kJ mol-1) sketch
a CH3CCl(CH3)CH3 507200 Propane, 2-chloro-2-methyl- 0.0 sketch of Propane, 2-chloro-2-methyl-
b CH3CHClCH2CH3 78864 Butane, 2-chloro- 13.2 sketch of Butane, 2-chloro-
c CH2ClCH2CH2CH3 109693 Butane, 1-chloro- 25.2 sketch of Butane, 1-chloro-
The calculated enthalpies include the calculated and scaled vibrational zero-point energy.
Methods with predefined basis sets
semi-empirical AM1 0.0 a
-13.0 b
-22.3 c
PM3 0.0 a
12.3 b
21.1 c
PM6 0.0 a
30.4 b
51.9 c
MNDOd 0.0 a
-13.1 b
-19.8 c
composite G1
NC
NC
G2MP2
NC
NC
G2
NC
NC
G3 0.0 a
22.9 b
43.7 c
G3B3 0.0 a
18.1 b
35.7 c
G3MP2 0.0 a
22.3 b
42.9 c
G4 0.0 a
18.6 b
35.6 c
CBS-Q 0.0 a
20.6 b
38.0 c
Group additivity gaw
-168.0 b
-149.0 c
molecular mechanics MM3 0.0 a
1.1 b
-1.8 c

Methods with standard basis sets
STO-3G 3-21G 3-21G* 6-31G 6-31G* 6-31G** 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) 6-311+G(3df,2p) cc-pVDZ cc-pVTZ aug-cc-pVDZ aug-cc-pVTZ
hartree fock HF 0.0 a
7.7 b
15.0 c
0.0 a
17.4 b
32.9 c
0.0 a
14.4 b
25.2 c
0.0 a
13.1 b
25.3 c
  0.0 a
8.9 b
16.6 c
  0.0 a
9.0 b
16.7 c
0.0 a
9.3 b
17.6 c
0.0 a
8.0 b
15.3 c
0.0 a
8.9 b
17.0 c
0.0 a
9.1 b
18.3 c
0.0 a
7.8 b
15.0 c
0.0 a
9.5 b
17.8 c
0.0 a
7.9 b
14.9 c
density functional LSDA 0.0 a
10.4 b
24.6 c
0.0 a
21.5 b
50.5 c
0.0 a
18.4 b
41.6 c
0.0 a
17.3 b
40.4 c
0.0 a
13.6 b
32.2 c
0.0 a
13.7 b
32.6 c
0.0 a
14.6 b
33.7 c
0.0 a
15.4 b
35.1 c
0.0 a
15.8 b
36.5 c
0.0 a
13.9 b
33.1 c
  0.0 a
12.9 b
33.1 c
0.0 a
13.3 b
32.5 c
0.0 a
14.4 b
33.9 c
 
BLYP 0.0 a
7.7 b
16.7 c
0.0 a
14.2 b
31.0 c
0.0 a
11.9 b
24.5 c
0.0 a
11.6 b
25.5 c
0.0 a
8.2 b
18.3 c
0.0 a
8.2 b
18.6 c
0.0 a
8.8 b
19.2 c
0.0 a
8.6 b
18.8 c
0.0 a
9.0 b
19.8 c
0.0 a
8.5 b
19.0 c
  0.0 a
7.5 b
18.9 c
  0.0 a
8.7 b
18.8 c
 
B1B95 0.0 a
8.1 b
17.4 c
0.0 a
18.3 b
39.6 c
0.0 a
15.4 b
31.8 c
0.0 a
13.4 b
29.4 c
0.0 a
9.8 b
21.2 c
0.0 a
9.9 b
21.7 c
0.0 a
10.4 b
22.4 c
0.0 a
10.9 b
23.0 c
0.0 a
11.2 b
24.0 c
0.0 a
9.3 b
20.7 c
  0.0 a
9.1 b
22.2 c
0.0 a
9.3 b
20.8 c
0.0 a
10.3 b
22.6 c
 
B3LYP 0.0 a
8.1 b
17.2 c
0.0 a
15.9 b
33.6 c
0.0 a
13.2 b
26.5 c
0.0 a
12.4 b
26.6 c
0.0 a
8.7 b
18.8 c
0.0 a
8.8 b
19.3 c
0.0 a
9.3 b
19.9 c
0.0 a
9.3 b
19.8 c
0.0 a
9.7 b
20.9 c
0.0 a
8.8 b
19.2 c
0.0 a
9.2 b
20.0 c
0.0 a
8.3 b
19.8 c
0.0 a
8.1 b
18.2 c
0.0 a
9.4 b
19.9 c
 
B3LYPultrafine         0.0 a
8.7 b
18.7 c
                   
B3PW91 0.0 a
7.9 b
16.3 c
0.0 a
17.4 b
36.4 c
0.0 a
14.5 b
28.7 c
0.0 a
12.8 b
27.4 c
0.0 a
8.9 b
19.2 c
0.0 a
9.1 b
19.8 c
0.0 a
9.5 b
20.3 c
0.0 a
9.9 b
20.8 c
0.0 a
10.3 b
22.0 c
0.0 a
8.6 b
18.8 c
  0.0 a
8.8 b
20.5 c
0.0 a
8.1 b
18.3 c
0.0 a
9.5 b
20.3 c
 
mPW1PW91 0.0 a
8.4 b
17.4 c
0.0 a
18.4 b
38.4 c
0.0 a
15.3 b
30.3 c
0.0 a
13.4 b
28.5 c
0.0 a
9.6 b
20.5 c
0.0 a
9.8 b
21.1 c
0.0 a
10.2 b
21.7 c
0.0 a
10.5 b
22.0 c
0.0 a
10.9 b
23.1 c
0.0 a
9.1 b
19.9 c
  0.0 a
9.5 b
22.0 c
0.0 a
8.8 b
19.5 c
0.0 a
10.1 b
21.7 c
 
PBEPBE 0.0 a
8.4 b
18.4 c
0.0 a
17.4 b
38.0 c
0.0 a
14.7 b
30.6 c
0.0 a
13.3 b
29.5 c
0.0 a
9.5 b
21.5 c
0.0 a
9.7 b
22.0 c
0.0 a
10.3 b
22.8 c
0.0 a
10.4 b
22.9 c
0.0 a
10.9 b
24.2 c
0.0 a
9.3 b
21.5 c
0.0 a
10.1 b
23.0 c
0.0 a
9.1 b
22.6 c
0.0 a
8.9 b
20.9 c
0.0 a
10.2 b
22.7 c
 
PBEPBEultrafine         0.0 a
9.5 b
21.3 c
                   
Moller Plesset perturbation MP2 0.0 a
10.2 b
18.6 c
0.0 a
22.5 b
40.2 c
0.0 a
21.1 b
38.3 c
0.0 a
19.6 b
35.1 c
  0.0 a
17.7 b
32.8 c
  0.0 a
21.3 b
38.2 c
0.0 a
20.3 b
36.7 c
0.0 a
17.9 b
34.8 c
 
  b
  c
     
MP2=FULL        
  b
  c
0.0 a
18.2 b
33.7 c
0.0 a
20.2 b
37.2 c
0.0 a
21.6 b
38.9 c
0.0 a
20.6 b
37.4 c
           
MP3         0.0 a
14.8 b
27.4 c
                   
Configuration interaction CID         0.0 a
13.3 b
24.5 c
                   
CISD         0.0 a
13.5 b
24.8 c
                   
Quadratic configuration interaction QCISD  
NC
NC
   
NC
NC
                   
Coupled Cluster CCD        
NC
NC
                   

Methods with effective core potentials (select basis sets)
CEP-31G CEP-31G* CEP-121G CEP-121G* LANL2DZ SDD
hartree fock HF 0.0 a
12.0 b
21.5 c
0.0 a
10.0 b
17.1 c
0.0 a
11.7 b
22.3 c
0.0 a
9.5 b
17.1 c
0.0 a
11.5 b
22.7 c
0.0 a
11.7 b
23.0 c
density functional B1B95 0.0 a
12.3 b
24.5 c
0.0 a
11.1 b
21.1 c
       
B3LYP 0.0 a
12.3 b
23.8 c
0.0 a
10.8 b
20.4 c
0.0 a
11.5 b
24.3 c
0.0 a
9.7 b
20.1 c
0.0 a
11.9 b
25.1 c
0.0 a
11.8 b
25.3 c
Moller Plesset perturbation MP2 0.0 a
20.0 b
33.1 c
0.0 a
20.9 b
35.5 c
0.0 a
22.0 b
38.6 c
0.0 a
22.9 b
40.9 c
0.0 a
19.6 b
34.9 c
0.0 a
20.2 b
36.7 c

Single point energy calculations (select basis sets)
6-311+G(3df,2p) cc-pVDZ cc-pVTZ aug-cc-pVDZ
Moller Plesset perturbation MP2FC// HF/6-31G*   0.0 a
22.3 b
41.4 c
0.0 a  
MP2FC// B3LYP/6-31G*   0.0 a
17.2 b
33.1 c
   
MP2FC// MP2FC/6-31G* 0.0 a
-312.3 b
0.0 a   0.0 a
-310.9 b
-292.3 c
MP4// HF/6-31G*   0.0 a
19.4 b
36.3 c
   
MP4// MP2/6-31G* 0.0 a
-316.0 b
     
Coupled Cluster CCSD// HF/6-31G*   0.0 a
18.9 b
35.3 c
   
CCSD(T)// HF/6-31G*   0.0 a
20.3 b
37.9 c
   
CCSD// MP2FC/6-31G* 0.0 a
-316.4 b
     
CCSD(T)// MP2FC/6-31G* 0.0 a
-314.9 b
     
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 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.