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All results from a given calculation for C3H4N2 (2H-Imidazole)

using model chemistry: MP2/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/CEP-121G
 hartrees
Energy at 0K-38.390137
Energy at 298.15K-38.396019
HF Energy-37.918670
Nuclear repulsion energy84.673856
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at MP2/CEP-121G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3234 3156 13.35      
2 A1 3066 2992 0.13      
3 A1 1599 1560 29.62      
4 A1 1458 1423 19.92      
5 A1 1353 1320 1.55      
6 A1 1235 1206 7.56      
7 A1 1016 991 4.21      
8 A1 906 884 10.12      
9 A2 1145 1118 0.00      
10 A2 700 684 0.00      
11 A2 525 512 0.00      
12 B1 3137 3061 0.05      
13 B1 1058 1033 17.20      
14 B1 762 744 20.96      
15 B1 339 331 44.69      
16 B2 3218 3140 4.43      
17 B2 1635 1596 0.01      
18 B2 1351 1319 13.65      
19 B2 1250 1220 10.47      
20 B2 1058 1033 41.16      
21 B2 946 923 68.28      

Unscaled Zero Point Vibrational Energy (zpe) 15494.2 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 15122.4 cm-1
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.
Rotational Constants (cm-1) from geometry optimized at MP2/CEP-121G
ABC
0.35346 0.28566 0.16301

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.247
N2 0.000 0.999 0.291
N3 0.000 -0.999 0.291
C4 0.000 0.749 -0.982
C5 0.000 -0.749 -0.982
H6 -0.904 0.000 1.868
H7 0.904 0.000 1.868
H8 0.000 1.515 -1.752
H9 0.000 -1.515 -1.752

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.38291.38292.35112.35111.09671.09673.35913.3591
N21.38291.99811.29662.16222.07462.07462.10613.2386
N31.38291.99812.16221.29662.07462.07463.23862.1061
C42.35111.29662.16221.49843.08233.08231.08552.3911
C52.35112.16221.29661.49843.08233.08232.39111.0855
H61.09672.07462.07463.08233.08231.80734.02664.0266
H71.09672.07462.07463.08233.08231.80734.02664.0266
H83.35912.10613.23861.08552.39114.02664.02663.0292
H93.35913.23862.10612.39111.08554.02664.02663.0292

picture of 2H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C4 122.635 C1 N3 C5 122.635
N2 C1 N3 92.509 N2 C1 H6 113.068
N2 C1 H7 113.068 N2 C4 C5 101.110
N2 C4 H8 124.052 N3 C1 H6 113.068
N3 C1 H7 113.068 N3 C5 C4 101.110
N3 C5 H9 124.052 C4 C5 H9 134.838
C5 C4 H8 134.838 H6 C1 H7 110.964
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability