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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-38.754338
Energy at 298.15K-38.760272
HF Energy-38.051487
Nuclear repulsion energy85.879319
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 3273 3118 13.12      
2 A1 3112 2965 0.15      
3 A1 1655 1577 21.82      
4 A1 1448 1380 11.95      
5 A1 1397 1331 13.10      
6 A1 1260 1200 5.18      
7 A1 1044 994 1.04      
8 A1 922 878 13.20      
9 A2 1139 1086 0.00      
10 A2 842 803 0.00      
11 A2 528 503 0.00      
12 B1 3174 3024 0.11      
13 B1 1020 972 23.94      
14 B1 809 771 11.55      
15 B1 338 322 37.19      
16 B2 3260 3106 4.38      
17 B2 1719 1638 0.00      
18 B2 1399 1333 38.05      
19 B2 1248 1189 1.89      
20 B2 1087 1036 36.44      
21 B2 928 885 67.57      

Unscaled Zero Point Vibrational Energy (zpe) 15800.3 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 15054.5 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
0.35988 0.29785 0.16829

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 1.216
N2 0.000 0.997 0.286
N3 0.000 -0.997 0.286
C4 0.000 0.732 -0.959
C5 0.000 -0.732 -0.959
H6 -0.901 0.000 1.838
H7 0.901 0.000 1.838
H8 0.000 1.492 -1.733
H9 0.000 -1.492 -1.733

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.36331.36332.29452.29451.09491.09493.30453.3045
N21.36331.99501.27342.13112.05262.05262.07903.2052
N31.36331.99502.13111.27342.05262.05263.20522.0790
C42.29451.27342.13111.46383.02803.02801.08462.3543
C52.29452.13111.27341.46383.02803.02802.35431.0846
H61.09492.05262.05263.02803.02801.80213.97323.9732
H71.09492.05262.05263.02803.02801.80213.97323.9732
H83.30452.07903.20521.08462.35433.97323.97322.9831
H93.30453.20522.07902.35431.08463.97323.97322.9831

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 120.933 C1 N3 C5 120.933
N2 C1 N3 94.056 N2 C1 H6 112.783
N2 C1 H7 112.783 N2 C4 C5 102.039
N2 C4 H8 123.499 N3 C1 H6 112.783
N3 C1 H7 112.783 N3 C5 C4 102.039
N3 C5 H9 123.499 C4 C5 H9 134.462
C5 C4 H8 134.462 H6 C1 H7 110.764
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability