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

using model chemistry: QCISD/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at QCISD/TZVP
 hartrees
Energy at 0K-225.571058
Energy at 298.15K-225.577012
HF Energy-224.794146
Nuclear repulsion energy166.705622
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 QCISD/TZVP
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 3280 3134 11.78      
2 A1 3114 2975 0.62      
3 A1 1735 1657 27.21      
4 A1 1462 1396 4.96      
5 A1 1421 1358 15.18      
6 A1 1266 1209 2.61      
7 A1 1046 999 1.59      
8 A1 940 898 13.51      
9 A2 1171 1118 0.00      
10 A2 843 805 0.00      
11 A2 523 500 0.00      
12 B1 3162 3021 0.01      
13 B1 1044 998 20.91      
14 B1 815 779 7.20      
15 B1 321 307 36.09      
16 B2 3266 3120 5.12      
17 B2 1791 1711 0.24      
18 B2 1431 1367 34.68      
19 B2 1280 1223 2.97      
20 B2 1101 1051 36.95      
21 B2 939 897 55.78      

Unscaled Zero Point Vibrational Energy (zpe) 15974.3 cm-1
Scaled (by 0.9553) Zero Point Vibrational Energy (zpe) 15260.3 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 QCISD/TZVP
ABC
0.36199 0.30392 0.17063

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.206
N2 0.000 0.997 0.280
N3 0.000 -0.997 0.280
C4 0.000 0.728 -0.946
C5 0.000 -0.728 -0.946
H6 -0.896 0.000 1.827
H7 0.896 0.000 1.827
H8 0.000 1.471 -1.729
H9 0.000 -1.471 -1.729

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.36071.36072.27132.27131.09051.09053.28243.2824
N21.36071.99451.25472.11662.04712.04712.06363.1823
N31.36071.99452.11661.25472.04712.04713.18232.0636
C42.27131.25472.11661.45693.00343.00341.07912.3348
C52.27132.11661.25471.45693.00343.00342.33481.0791
H61.09052.04712.04713.00343.00341.79253.95073.9507
H71.09052.04712.04713.00343.00341.79253.95073.9507
H83.28242.06363.18231.07912.33483.95073.95072.9424
H93.28243.18232.06362.33481.07913.95073.95072.9424

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 120.501 C1 N3 C5 120.501
N2 C1 N3 94.257 N2 C1 H6 112.802
N2 C1 H7 112.802 N2 C4 C5 102.370
N2 C4 H8 124.137 N3 C1 H6 112.802
N3 C1 H7 112.802 N3 C5 C4 102.370
N3 C5 H9 124.137 C4 C5 H9 133.493
C5 C4 H8 133.493 H6 C1 H7 110.551
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability