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

using model chemistry: MP2/CEP-31G

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-31G
 hartrees
Energy at 0K-38.326250
Energy at 298.15K-38.332133
HF Energy-37.906058
Nuclear repulsion energy84.226314
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-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 A1 3273 3163 16.26      
2 A1 3108 3004 0.93      
3 A1 1617 1562 29.41      
4 A1 1462 1413 22.85      
5 A1 1350 1304 2.40      
6 A1 1236 1195 7.87      
7 A1 1014 980 2.82      
8 A1 892 862 16.66      
9 A2 1146 1108 0.00      
10 A2 809 782 0.00      
11 A2 532 514 0.00      
12 B1 3179 3072 1.92      
13 B1 1054 1019 18.17      
14 B1 799 772 19.77      
15 B1 325 314 52.82      
16 B2 3249 3140 5.85      
17 B2 1646 1591 0.02      
18 B2 1347 1301 17.59      
19 B2 1228 1187 14.71      
20 B2 1060 1024 42.00      
21 B2 932 901 65.61      

Unscaled Zero Point Vibrational Energy (zpe) 15629.1 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 15102.4 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-31G
ABC
0.35022 0.28216 0.16123

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.254
N2 0.000 0.999 0.292
N3 0.000 -0.999 0.292
C4 0.000 0.758 -0.989
C5 0.000 -0.758 -0.989
H6 -0.908 0.000 1.882
H7 0.908 0.000 1.882
H8 0.000 1.533 -1.757
H9 0.000 -1.533 -1.757

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.38681.38682.36702.36701.10441.10443.37853.3785
N21.38681.99851.30362.17422.08602.08602.11763.2574
N31.38681.99852.17421.30362.08602.08603.25742.1176
C42.36701.30362.17421.51513.10513.10511.09142.4157
C52.36702.17421.30361.51513.10513.10512.41571.0914
H61.10442.08602.08603.10513.10511.81634.05204.0520
H71.10442.08602.08603.10513.10511.81634.05204.0520
H83.37852.11763.25741.09142.41574.05204.05203.0656
H93.37853.25742.11762.41571.09144.05204.05203.0656

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 123.212 C1 N3 C5 123.212
N2 C1 N3 92.203 N2 C1 H6 113.241
N2 C1 H7 113.241 N2 C4 C5 100.687
N2 C4 H8 124.053 N3 C1 H6 113.241
N3 C1 H7 113.241 N3 C5 C4 100.687
N3 C5 H9 124.053 C4 C5 H9 135.260
C5 C4 H8 135.260 H6 C1 H7 110.625
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability