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All results from a given calculation for C3H4N2 (1H-Imidazole)

using model chemistry: CBS-Q

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CBS-Q
 hartrees
Energy at 0K-225.838142
Energy at 298.15K-225.833431
HF Energy-224.812419
Nuclear repulsion energy164.859856
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 CBS-Q
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3931 3931 84.13      
2 A' 3459 3459 3.91      
3 A' 3428 3428 0.14      
4 A' 3426 3426 13.54      
5 A' 1741 1741 26.63      
6 A' 1661 1661 28.51      
7 A' 1589 1589 25.49      
8 A' 1496 1496 10.22      
9 A' 1402 1402 0.44      
10 A' 1252 1252 5.22      
11 A' 1230 1230 4.29      
12 A' 1186 1186 13.34      
13 A' 1154 1154 55.56      
14 A' 1020 1020 1.70      
15 A' 983 983 7.42      
16 A" 987 987 0.17      
17 A" 957 957 16.49      
18 A" 829 829 42.92      
19 A" 732 732 11.77      
20 A" 691 691 7.25      
21 A" 530 530 143.97      

Unscaled Zero Point Vibrational Energy (zpe) 16841.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16841.3 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 CBS-Q
ABC
0.32543 0.30914 0.15854

See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.097 0.000
C2 -1.074 0.278 0.000
C3 1.111 0.290 0.000
N4 -0.742 -0.967 0.000
C5 0.630 -0.975 0.000
H6 -0.013 2.088 0.000
H7 -2.079 0.656 0.000
H8 2.106 0.685 0.000
H9 1.183 -1.894 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.35041.37282.19332.16490.99142.12562.14613.2161
C21.35042.18491.28912.11522.09771.07393.20643.1325
C31.37282.18492.23901.35252.12073.21111.07132.1850
N42.19331.28912.23901.37223.14102.10333.29312.1364
C52.16492.11521.35251.37223.12943.16242.22121.0728
H60.99142.09772.12073.14103.12942.51362.54194.1579
H72.12561.07393.21112.10333.16242.51364.18594.1407
H82.14613.20641.07133.29312.22122.54194.18592.7396
H93.21613.13252.18502.13641.07284.15794.14072.7396

picture of 1H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 N4 112.376 N1 C2 H7 122.096
N1 C3 C5 105.186 N1 C3 H8 122.340
C2 N1 C3 106.698 C2 N1 H6 126.524
C2 N4 C5 105.229 C3 N1 H6 126.778
C3 C5 N4 110.511 C3 C5 H9 128.180
N4 C2 H7 125.528 N4 C5 H9 121.310
C5 C3 H8 132.474
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability