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

using model chemistry: ROMP2/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at ROMP2/6-311G**
 hartrees
Energy at 0K-225.629949
Energy at 298.15K-225.635885
HF Energy-224.866401
Nuclear repulsion energy162.885460
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 ROMP2/6-311G**
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' 3693 3693        
2 A' 3314 3314        
3 A' 3291 3291        
4 A' 3285 3285        
5 A' 1542 1542        
6 A' 1514 1514        
7 A' 1477 1477        
8 A' 1374 1374        
9 A' 1280 1280        
10 A' 1193 1193        
11 A' 1157 1157        
12 A' 1108 1108        
13 A' 1089 1089        
14 A' 938 938        
15 A' 900 900        
16 A" 828 828        
17 A" 786 786        
18 A" 701 701        
19 A" 680 680        
20 A" 640 640        
21 A" 513 513        

Unscaled Zero Point Vibrational Energy (zpe) 15650.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 15650.9 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 ROMP2/6-311G**
ABC
0.32584 0.31061 0.15902

See section I.F.4 to change rotational constant units
Geometric Data calculated at ROMP2/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.105 0.000
C2 -1.091 0.283 0.000
C3 1.120 0.308 0.000
N4 -0.741 -0.994 0.000
C5 0.634 -0.985 0.000
H6 -0.011 2.113 0.000
H7 -2.102 0.664 0.000
H8 2.119 0.715 0.000
H9 1.202 -1.904 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.36591.37442.22602.18361.00842.14792.15473.2398
C21.36592.21101.32382.14052.12531.08063.23903.1684
C31.37442.21102.27161.38122.13003.24171.07902.2134
N42.22601.32382.27161.37543.19202.14483.33242.1459
C52.18362.14051.38121.37543.16433.19432.25741.0805
H61.00842.12532.13003.19203.16432.54442.54784.1960
H72.14791.08063.24172.14483.19432.54444.22164.1845
H82.15473.23901.07903.33242.25742.54784.22162.7749
H93.23983.16842.21342.14591.08054.19604.18452.7749

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 111.693 N1 C2 H7 122.356
N1 C3 C5 104.825 N1 C3 H8 122.403
C2 N1 C3 107.573 C2 N1 H6 126.382
C2 N4 C5 104.918 C3 N1 H6 126.045
C3 C5 N4 110.991 C3 C5 H9 127.668
N4 C2 H7 125.951 N4 C5 H9 121.341
C5 C3 H8 132.771
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at ROMP2/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.411      
2 C 0.244      
3 C 0.005      
4 N -0.393      
5 C -0.032      
6 H 0.242      
7 H 0.120      
8 H 0.118      
9 H 0.107      


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> 80.165
(<r2>)1/2 8.953