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

using model chemistry: MP3=FULL/3-21G*

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=FULL/3-21G*
 hartrees
Energy at 0K-224.014953
Energy at 298.15K-224.020839
HF Energy-223.508314
Nuclear repulsion energy157.233089
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=FULL/3-21G*
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' 3291 3291 8.44      
2 A' 3255 3255 5.94      
3 A' 3114 3114 0.36      
4 A' 1604 1604 15.82      
5 A' 1546 1546 7.73      
6 A' 1501 1501 8.29      
7 A' 1329 1329 12.25      
8 A' 1318 1318 2.79      
9 A' 1286 1286 10.34      
10 A' 990 990 34.59      
11 A' 938 938 4.95      
12 A' 893 893 4.00      
13 A' 839 839 12.29      
14 A' 805 805 9.81      
15 A" 3161 3161 1.05      
16 A" 1196 1196 0.07      
17 A" 1026 1026 21.50      
18 A" 957 957 0.17      
19 A" 786 786 13.63      
20 A" 570 570 19.36      
21 A" 389 389 9.77      

Unscaled Zero Point Vibrational Energy (zpe) 15395.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 15395.7 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=FULL/3-21G*
ABC
0.30492 0.28032 0.15026

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.146 -0.561 0.000
C2 -0.775 0.888 0.000
N3 0.490 1.152 0.000
C4 1.183 -0.203 0.000
C5 0.000 -1.175 0.000
H6 -1.562 1.625 0.000
H7 1.807 -0.285 0.896
H8 1.807 -0.285 -0.896
H9 0.087 -2.254 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.49512.36862.35671.30062.22513.09853.09852.0943
C21.49511.29202.24122.20381.07892.97412.97413.2573
N32.36861.29201.52222.37882.10572.14582.14583.4298
C42.35672.24121.52221.53183.29831.09481.09482.3258
C51.30062.20382.37881.53183.20692.20492.20491.0817
H62.22511.07892.10573.29833.20693.97563.97564.2148
H73.09852.97412.14581.09482.20493.97561.79132.7637
H83.09852.97412.14581.09482.20493.97561.79132.7637
H92.09433.25733.42982.32581.08174.21482.76372.7637

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 116.202 N1 C2 H6 118.751
N1 C5 C4 112.362 N1 C5 H9 122.810
C2 N1 C5 103.835 C2 N3 C4 105.280
N3 C2 H6 125.047 N3 C4 C5 102.321
N3 C4 H7 109.073 N3 C4 H8 109.073
C4 C5 H9 124.828 C5 C4 H7 113.112
C5 C4 H8 113.112 H7 C4 H8 109.798
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability