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

using model chemistry: MP2/LANL2DZ

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/LANL2DZ
 hartrees
Energy at 0K-225.082079
Energy at 298.15K-225.088016
HF Energy-224.623458
Nuclear repulsion energy163.260880
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/LANL2DZ
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 3292 3170 12.28      
2 A1 3096 2982 0.00      
3 A1 1616 1557 29.51      
4 A1 1469 1415 23.23      
5 A1 1352 1302 2.07      
6 A1 1232 1187 7.16      
7 A1 1017 979 5.49      
8 A1 908 875 11.29      
9 A2 1138 1096 0.00      
10 A2 825 794 0.00      
11 A2 544 524 0.00      
12 B1 3167 3050 0.01      
13 B1 1058 1019 15.62      
14 B1 782 753 20.91      
15 B1 362 349 48.32      
16 B2 3269 3149 4.06      
17 B2 1658 1597 0.04      
18 B2 1345 1295 13.14      
19 B2 1253 1206 7.22      
20 B2 1057 1018 38.45      
21 B2 950 915 74.18      

Unscaled Zero Point Vibrational Energy (zpe) 15694.2 cm-1
Scaled (by 0.9631) Zero Point Vibrational Energy (zpe) 15115.1 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/LANL2DZ
ABC
0.35352 0.28649 0.16329

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/LANL2DZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.244
N2 0.000 0.999 0.290
N3 0.000 -0.999 0.290
C4 0.000 0.749 -0.980
C5 0.000 -0.749 -0.980
H6 -0.903 0.000 1.871
H7 0.903 0.000 1.871
H8 0.000 1.514 -1.750
H9 0.000 -1.514 -1.750

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.38171.38172.34692.34691.09911.09913.35513.3551
N21.38171.99791.29392.16062.07682.07682.10373.2363
N31.38171.99792.16061.29392.07682.07683.23632.1037
C42.34691.29392.16061.49863.08273.08271.08502.3904
C52.34692.16061.29391.49863.08273.08272.39041.0850
H61.09912.07682.07683.08273.08271.80624.02704.0270
H71.09912.07682.07683.08273.08271.80624.02704.0270
H83.35512.10373.23631.08502.39044.02704.02703.0271
H93.35513.23632.10372.39041.08504.02704.02703.0271

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 122.573 C1 N3 C5 122.573
N2 C1 N3 92.605 N2 C1 H6 113.191
N2 C1 H7 113.191 N2 C4 C5 101.125
N2 C4 H8 124.099 N3 C1 H6 113.191
N3 C1 H7 113.191 N3 C5 C4 101.125
N3 C5 H9 124.099 C4 C5 H9 134.777
C5 C4 H8 134.777 H6 C1 H7 110.498
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability