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All results from a given calculation for C3H4N2 (4H-Imidazole)

using model chemistry: MP3/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP3/6-31G*
 hartrees
Energy at 0K-225.512502
Energy at 298.15K-225.518465
HF Energy-224.795450
Nuclear repulsion energy160.459093
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 MP3/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3289 3087 12.28      
2 A' 3266 3066 6.87      
3 A' 3113 2922 1.18      
4 A' 1728 1622 29.62      
5 A' 1648 1547 8.88      
6 A' 1483 1392 15.68      
7 A' 1370 1285 22.49      
8 A' 1357 1274 7.23      
9 A' 1316 1236 4.01      
10 A' 1067 1002 55.55      
11 A' 1031 968 7.77      
12 A' 981 921 2.01      
13 A' 900 845 7.79      
14 A' 893 838 9.31      
15 A" 3157 2963 1.80      
16 A" 1196 1122 0.26      
17 A" 1033 970 14.97      
18 A" 965 906 0.02      
19 A" 779 731 7.49      
20 A" 570 535 22.96      
21 A" 374 351 6.73      

Unscaled Zero Point Vibrational Energy (zpe) 15757.9 cm-1
Scaled (by 0.9386) Zero Point Vibrational Energy (zpe) 14790.4 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 MP3/6-31G*
ABC
0.32008 0.29181 0.15712

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.204 0.354 0.000
C2 0.000 1.137 0.000
N3 1.117 0.509 0.000
C4 0.735 -0.902 0.000
C5 -0.765 -0.857 0.000
H6 -0.076 2.219 0.000
H7 1.146 -1.406 0.884
H8 1.146 -1.406 -0.884
H9 -1.431 -1.714 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.43642.32632.30991.28702.18023.06563.06562.0803
C21.43641.28202.16782.13551.08452.92592.92593.1906
N32.32631.28201.46192.32562.08532.10872.10873.3820
C42.30992.16781.46191.50093.22481.09691.09692.3135
C51.28702.13552.32561.50093.15202.17632.17631.0860
H62.18021.08452.08533.22483.15203.92583.92584.1605
H73.06562.92592.10871.09692.17633.92581.76712.7423
H83.06562.92592.10871.09692.17633.92581.76712.7423
H92.08033.19063.38202.31351.08604.16052.74232.7423

picture of 4H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 N3 117.581 N1 C2 H6 119.073
N1 C5 C4 111.662 N1 C5 H9 122.253
C2 N1 C5 103.147 C2 N3 C4 104.189
N3 C2 H6 123.346 N3 C4 C5 103.420
N3 C4 H7 110.175 N3 C4 H8 110.175
C4 C5 H9 126.085 C5 C4 H7 112.876
C5 C4 H8 112.876 H7 C4 H8 107.311
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability