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NIST Standard Reference Database 101
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IV.A.4. (XIV.F.)

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

Isomers of C6H13N

2015 06 30 15:39
index Species CAS number Name Relative experimental enthalpy (kJ mol-1) sketch
a C6H13N 108918 cyclohexanamine   sketch of cyclohexanamine
b C6H13N 109057 2-Methylpiperidine   sketch of 2-Methylpiperidine
The calculated enthalpies include the calculated and scaled vibrational zero-point energy.
Methods with predefined basis sets
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) TZVP cc-pVDZ cc-pVTZ aug-cc-pVTZ daug-cc-pVTZ
hartree fock HF                               0.0 a
18.9 b
density functional M06-2X     0.0 a
9.0 b 		                         
TPSSh                   0.0 a
9.3 b 		           
wB97X-D     0.0 a
12.2 b 		  0.0 a
10.9 b 		  0.0 a
19.8 b 		  0.0 a
18.7 b 		    0.0 a
20.4 b 		0.0 a
19.8 b 		0.0 a
19.5 b 		0.0 a
20.9 b 		 
B97D3   0.0 a
6.8 b 		    0.0 a
7.5 b 		  0.0 a
16.9 b 		  0.0 a
15.8 b 		  0.0 a
18.0 b 		0.0 a
17.9 b 		  0.0 a
16.9 b 		0.0 a
18.7 b 		 
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) TZVP cc-pVDZ cc-pVTZ aug-cc-pVTZ daug-cc-pVTZ
Moller Plesset perturbation MP2 0.0 a
-4.4 b 		0.0 a
12.5 b 		    0.0 a
12.6 b 		0.0 a
17.4 b 		0.0 a
20.6 b 		0.0 a
16.9 b 		0.0 a
21.7 b 		      0.0 a
19.7 b 		     
MP2=FULL     0.0 a
12.6 b 		  0.0 a
12.5 b 		0.0 a
17.3 b 		0.0 a
20.3 b 		0.0 a
17.2 b 		        0.0 a
19.4 b 		  0.0 a
24.5 b 		 
MP3         0.0 a
13.5 b 		                     
Configuration interaction CID   0.0 a
13.3 b 		0.0 a
13.3 b 		0.0 a
21.2 b 		0.0 a
12.1 b 		    0.0 a
15.5 b 		               
CISD   0.0 a
12.9 b 		0.0 a
12.9 b 		0.0 a
20.9 b 		0.0 a
11.8 b 		    0.0 a
15.3 b 		               
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) TZVP cc-pVDZ cc-pVTZ aug-cc-pVTZ daug-cc-pVTZ
Methods with effective core potentials (select basis sets)
CEP-31G CEP-31G* CEP-121G CEP-121G* LANL2DZ SDD cc-pVTZ-PP aug-cc-pVTZ-PP Def2TZVPP
hartree fock HF                 0.0 a
18.7 b
density functional B3LYP                 0.0 a
17.7 b
PBEPBE                 0.0 a
18.4 b
Moller Plesset perturbation MP2     0.0 a
24.5 b 		0.0 a
17.2 b 		0.0 a
24.1 b 		0.0 a
24.1 b 		    0.0 a
23.0 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.