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

using model chemistry: ROMP2/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at ROMP2/6-31+G**
 hartrees
Energy at 0K-225.568463
Energy at 298.15K-225.574320
HF Energy-224.829552
Nuclear repulsion energy162.728408
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 ROMP2/6-31+G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3724 3724        
2 A' 3361 3361        
3 A' 3343 3343        
4 A' 3335 3335        
5 A' 1560 1560        
6 A' 1525 1525        
7 A' 1487 1487        
8 A' 1394 1394        
9 A' 1297 1297        
10 A' 1192 1192        
11 A' 1169 1169        
12 A' 1122 1122        
13 A' 1097 1097        
14 A' 938 938        
15 A' 899 899        
16 A" 808 808        
17 A" 761 761        
18 A" 686 686        
19 A" 666 666        
20 A" 615 615        
21 A" 476 476        

Unscaled Zero Point Vibrational Energy (zpe) 15727.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 15727.9 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 ROMP2/6-31+G**
ABC
0.32443 0.31064 0.15869

See section I.F.4 to change rotational constant units
Geometric Data calculated at ROMP2/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.106 0.000
C2 -1.094 0.285 0.000
C3 1.121 0.307 0.000
N4 -0.741 -0.994 0.000
C5 0.637 -0.986 0.000
H6 -0.012 2.114 0.000
H7 -2.103 0.663 0.000
H8 2.118 0.712 0.000
H9 1.203 -1.902 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.36771.37682.22722.18671.00832.14892.15403.2398
C21.36772.21521.32732.14772.12491.07713.24003.1718
C31.37682.21522.27161.38022.13343.24341.07602.2105
N42.22721.32732.27161.37823.19272.14493.32942.1454
C52.18672.14771.38021.37823.16733.19772.25291.0769
H61.00832.12492.13343.19273.16732.54472.55014.1962
H72.14891.07713.24342.14493.19772.54474.22074.1841
H82.15403.24001.07603.32942.25292.55014.22072.7699
H93.23983.17182.21052.14541.07694.19624.18412.7699

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 111.455 N1 C2 H7 122.590
N1 C3 C5 104.962 N1 C3 H8 122.376
C2 N1 C3 107.635 C2 N1 H6 126.172
C2 N4 C5 105.071 C3 N1 H6 126.194
C3 C5 N4 110.877 C3 C5 H9 127.786
N4 C2 H7 125.955 N4 C5 H9 121.337
C5 C3 H8 132.662
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at ROMP2/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.470      
2 C 0.148      
3 C -0.098      
4 N -0.378      
5 C -0.083      
6 H 0.350      
7 H 0.175      
8 H 0.188      
9 H 0.167      


Electric dipole moments


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 80.617
(<r2>)1/2 8.979