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

using model chemistry: MP2/STO-3G

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/STO-3G
 hartrees
Energy at 0K-222.150481
Energy at 298.15K-222.156118
HF Energy-221.865408
Nuclear repulsion energy162.843409
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/STO-3G
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 3549 3095 7.56      
2 A1 3404 2968 14.08      
3 A1 1767 1541 13.49      
4 A1 1588 1385 6.52      
5 A1 1438 1254 0.85      
6 A1 1345 1172 6.47      
7 A1 1081 942 1.56      
8 A1 951 829 7.51      
9 A2 1221 1065 0.00      
10 A2 871 759 0.00      
11 A2 552 482 0.00      
12 B1 3518 3067 7.78      
13 B1 1091 951 5.50      
14 B1 812 708 2.58      
15 B1 249 217 31.02      
16 B2 3534 3081 0.54      
17 B2 1794 1565 1.33      
18 B2 1447 1262 10.52      
19 B2 1298 1131 11.15      
20 B2 1106 964 7.91      
21 B2 981 855 47.12      

Unscaled Zero Point Vibrational Energy (zpe) 16797.5 cm-1
Scaled (by 0.8719) Zero Point Vibrational Energy (zpe) 14645.7 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 MP2/STO-3G
ABC
0.35468 0.28339 0.16270

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/STO-3G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.259
N2 0.000 1.000 0.284
N3 0.000 -1.000 0.284
C4 0.000 0.742 -0.981
C5 0.000 -0.742 -0.981
H6 -0.919 0.000 1.883
H7 0.919 0.000 1.883
H8 0.000 1.514 -1.765
H9 0.000 -1.514 -1.765

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.39651.39652.35952.35951.11021.11023.38183.3818
N21.39651.99941.29052.15252.09742.09742.11253.2428
N31.39651.99942.15251.29052.09742.09743.24282.1125
C42.35951.29052.15251.48443.09733.09731.10022.3884
C52.35952.15251.29051.48443.09733.09732.38841.1002
H61.11022.09742.09743.09733.09731.83714.05474.0547
H71.11022.09742.09743.09733.09731.83714.05474.0547
H83.38182.11253.24281.10022.38844.05474.05473.0273
H93.38183.24282.11252.38841.10024.05474.05473.0273

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 122.779 C1 N3 C5 122.779
N2 C1 N3 91.425 N2 C1 H6 113.090
N2 C1 H7 113.090 N2 C4 C5 101.508
N2 C4 H8 123.972 N3 C1 H6 113.090
N3 C1 H7 113.090 N3 C5 C4 101.508
N3 C5 H9 123.972 C4 C5 H9 134.520
C5 C4 H8 134.520 H6 C1 H7 111.659
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability