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

using model chemistry: HF/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/STO-3G
 hartrees
Energy at 0K-221.872205
Energy at 298.15K-221.878185
HF Energy-221.872205
Nuclear repulsion energy165.502306
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 HF/STO-3G
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 3758 3068 27.27      
2 A1 3593 2934 24.23      
3 A1 2007 1638 11.85      
4 A1 1693 1383 2.89      
5 A1 1581 1291 11.07      
6 A1 1421 1161 4.33      
7 A1 1182 965 2.08      
8 A1 1042 851 12.77      
9 A2 1298 1060 0.00      
10 A2 1031 842 0.00      
11 A2 612 500 0.00      
12 B1 3704 3025 14.86      
13 B1 1164 950 6.56      
14 B1 924 755 0.78      
15 B1 339 277 35.53      
16 B2 3737 3051 0.51      
17 B2 2091 1707 2.08      
18 B2 1599 1306 11.77      
19 B2 1400 1143 7.94      
20 B2 1193 974 12.39      
21 B2 1048 855 58.95      

Unscaled Zero Point Vibrational Energy (zpe) 18207.8 cm-1
Scaled (by 0.8165) Zero Point Vibrational Energy (zpe) 14866.7 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 HF/STO-3G
ABC
0.36058 0.29639 0.16799

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/STO-3G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.235
N2 0.000 0.999 0.272
N3 0.000 -0.999 0.272
C4 0.000 0.731 -0.952
C5 0.000 -0.731 -0.952
H6 -0.902 0.000 1.854
H7 0.902 0.000 1.854
H8 0.000 1.465 -1.748
H9 0.000 -1.465 -1.748

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.38791.38792.30632.30631.09411.09413.32383.3238
N21.38791.99861.25362.11952.07732.07732.07333.1869
N31.38791.99862.11951.25362.07732.07733.18692.0733
C42.30631.25362.11951.46143.03703.03701.08312.3358
C52.30632.11951.25361.46143.03703.03702.33581.0831
H61.09412.07732.07733.03703.03701.80473.99213.9921
H71.09412.07732.07733.03703.03701.80473.99213.9921
H83.32382.07333.18691.08312.33583.99213.99212.9308
H93.32383.18692.07332.33581.08313.99213.99212.9308

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 121.568 C1 N3 C5 121.568
N2 C1 N3 92.115 N2 C1 H6 113.107
N2 C1 H7 113.107 N2 C4 C5 102.374
N2 C4 H8 124.913 N3 C1 H6 113.107
N3 C1 H7 113.107 N3 C5 C4 102.374
N3 C5 H9 124.913 C4 C5 H9 132.712
C5 C4 H8 132.712 H6 C1 H7 111.121
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.039      
2 N -0.271      
3 N -0.271      
4 C 0.037      
5 C 0.037      
6 H 0.126      
7 H 0.126      
8 H 0.089      
9 H 0.089      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -0.376 0.376
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.058 0.000 0.000
y 0.000 -32.500 0.000
z 0.000 0.000 -21.965
Traceless
 xyz
x 1.175 0.000 0.000
y 0.000 -8.489 0.000
z 0.000 0.000 7.314
Polar
3z2-r214.628
x2-y26.442
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.515 0.000 0.000
y 0.000 2.323 0.000
z 0.000 0.000 5.121


<r2> (average value of r2) Å2
<r2> 77.136
(<r2>)1/2 8.783