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

using model chemistry: MP3=FULL/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=FULL/6-31G*
 hartrees
Energy at 0K-225.533488
Energy at 298.15K-225.539457
HF Energy-224.795685
Nuclear repulsion energy160.605300
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/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' 3291 3088 12.20      
2 A' 3268 3067 6.83      
3 A' 3114 2921 1.11      
4 A' 1730 1624 29.84      
5 A' 1650 1549 8.94      
6 A' 1483 1391 16.00      
7 A' 1371 1286 22.53      
8 A' 1359 1275 7.40      
9 A' 1318 1237 3.98      
10 A' 1069 1003 55.47      
11 A' 1033 969 8.04      
12 A' 983 922 2.01      
13 A' 902 847 7.89      
14 A' 895 840 9.31      
15 A" 3157 2962 1.70      
16 A" 1198 1124 0.26      
17 A" 1035 971 14.93      
18 A" 969 909 0.03      
19 A" 781 733 7.31      
20 A" 572 537 23.01      
21 A" 375 352 6.80      

Unscaled Zero Point Vibrational Energy (zpe) 15775.6 cm-1
Scaled (by 0.9383) Zero Point Vibrational Energy (zpe) 14802.3 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/6-31G*
ABC
0.32052 0.29251 0.15743

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.201 0.352 0.000
C2 0.000 1.139 0.000
N3 1.114 0.508 0.000
C4 0.738 -0.901 0.000
C5 -0.767 -0.857 0.000
H6 -0.078 2.221 0.000
H7 1.148 -1.405 0.883
H8 1.148 -1.405 -0.883
H9 -1.430 -1.718 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.43592.32052.30921.28472.18053.06423.06422.0831
C21.43591.27992.16912.13801.08552.92752.92753.1949
N32.32051.27991.45862.32432.08712.10802.10803.3807
C42.30922.16911.45861.50603.22731.09681.09682.3171
C51.28472.13802.32431.50603.15442.17942.17941.0869
H62.18051.08552.08713.22733.15443.92903.92904.1651
H73.06422.92752.10801.09682.17943.92901.76682.7432
H83.06422.92752.10801.09682.17943.92901.76682.7432
H92.08313.19493.38072.31711.08694.16512.74322.7432

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 117.285 N1 C2 H6 119.069
N1 C5 C4 111.429 N1 C5 H9 122.671
C2 N1 C5 103.458 C2 N3 C4 104.575
N3 C2 H6 123.646 N3 C4 C5 103.252
N3 C4 H7 110.363 N3 C4 H8 110.363
C4 C5 H9 125.900 C5 C4 H7 112.778
C5 C4 H8 112.778 H7 C4 H8 107.313
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability