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

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

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at ROMP2/6-31G**
 hartrees
Energy at 0K-225.552517
Energy at 298.15K-225.558454
HF Energy-224.821313
Nuclear repulsion energy162.974520
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 ROMP2/6-31G**
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' 3740 3740        
2 A' 3368 3368        
3 A' 3342 3342        
4 A' 3338 3338        
5 A' 1574 1574        
6 A' 1542 1542        
7 A' 1503 1503        
8 A' 1404 1404        
9 A' 1304 1304        
10 A' 1200 1200        
11 A' 1176 1176        
12 A' 1129 1129        
13 A' 1105 1105        
14 A' 942 942        
15 A' 902 902        
16 A" 828 828        
17 A" 777 777        
18 A" 700 700        
19 A" 684 684        
20 A" 638 638        
21 A" 528 528        

Unscaled Zero Point Vibrational Energy (zpe) 15860.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 15860.9 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 ROMP2/6-31G**
ABC
0.32583 0.31120 0.15918

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.104 0.000
C2 -1.091 0.283 0.000
C3 1.120 0.307 0.000
N4 -0.741 -0.994 0.000
C5 0.635 -0.983 0.000
H6 -0.012 2.111 0.000
H7 -2.099 0.664 0.000
H8 2.115 0.713 0.000
H9 1.203 -1.898 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.36561.37472.22562.18181.00672.14482.15103.2343
C21.36562.21121.32482.14122.12261.07713.23523.1657
C31.37472.21122.27051.37772.12973.23851.07522.2063
N42.22561.32482.27051.37653.18972.14313.32772.1438
C52.18182.14121.37771.37653.16093.19192.25091.0768
H61.00672.12262.12973.18973.16092.53992.54534.1889
H72.14481.07713.23852.14313.19192.53994.21454.1791
H82.15103.23521.07523.32772.25092.54534.21452.7659
H93.23433.16572.20632.14381.07684.18894.17912.7659

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 111.622 N1 C2 H7 122.369
N1 C3 C5 104.875 N1 C3 H8 122.332
C2 N1 C3 107.587 C2 N1 H6 126.276
C2 N4 C5 104.858 C3 N1 H6 126.137
C3 C5 N4 111.058 C3 C5 H9 127.603
N4 C2 H7 126.009 N4 C5 H9 121.338
C5 C3 H8 132.792
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at ROMP2/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.639      
2 C 0.318      
3 C 0.032      
4 N -0.531      
5 C 0.010      
6 H 0.325      
7 H 0.166      
8 H 0.170      
9 H 0.148      


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> 79.912
(<r2>)1/2 8.939