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

using model chemistry: MP2=FULL/6-31G

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=FULL/6-31G
 hartrees
Energy at 0K-225.081120
Energy at 298.15K-225.087101
HF Energy-224.598107
Nuclear repulsion energy164.364022
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=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 A1 3297 3133 8.71      
2 A1 3121 2965 1.07      
3 A1 1638 1556 28.99      
4 A1 1503 1428 14.74      
5 A1 1378 1309 1.05      
6 A1 1257 1194 7.20      
7 A1 1042 990 7.61      
8 A1 938 891 7.81      
9 A2 1164 1106 0.00      
10 A2 799 759 0.00      
11 A2 547 520 0.00      
12 B1 3177 3018 0.04      
13 B1 1066 1013 17.04      
14 B1 790 751 15.98      
15 B1 370 352 49.83      
16 B2 3281 3118 6.21      
17 B2 1683 1599 0.63      
18 B2 1367 1299 9.55      
19 B2 1278 1214 4.24      
20 B2 1080 1026 34.79      
21 B2 965 917 71.69      

Unscaled Zero Point Vibrational Energy (zpe) 15870.2 cm-1
Scaled (by 0.9501) Zero Point Vibrational Energy (zpe) 15078.3 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 MP2=FULL/6-31G
ABC
0.35765 0.29120 0.16565

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.233
N2 0.000 0.999 0.287
N3 0.000 -0.999 0.287
C4 0.000 0.739 -0.970
C5 0.000 -0.739 -0.970
H6 -0.899 0.000 1.858
H7 0.899 0.000 1.858
H8 0.000 1.491 -1.748
H9 0.000 -1.491 -1.748

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.37551.37552.32382.32381.09481.09483.33353.3335
N21.37551.99711.28392.14452.06702.06702.09423.2159
N31.37551.99712.14451.28392.06702.06703.21592.0942
C42.32381.28392.14451.47753.05803.05801.08242.3618
C52.32382.14451.28391.47753.05803.05802.36181.0824
H61.09482.06702.06703.05803.05801.79814.00454.0045
H71.09482.06702.06703.05803.05801.79814.00454.0045
H83.33352.09423.21591.08242.36184.00454.00452.9825
H93.33353.21592.09422.36181.08244.00454.00452.9825

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 121.777 C1 N3 C5 121.777
N2 C1 N3 93.098 N2 C1 H6 113.105
N2 C1 H7 113.105 N2 C4 C5 101.674
N2 C4 H8 124.285 N3 C1 H6 113.105
N3 C1 H7 113.105 N3 C5 C4 101.674
N3 C5 H9 124.285 C4 C5 H9 134.040
C5 C4 H8 134.040 H6 C1 H7 110.416
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability