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

using model chemistry: HF/CEP-121G*

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/CEP-121G*
 hartrees
Energy at 0K-38.055285
Energy at 298.15K-38.061480
HF Energy-38.055285
Nuclear repulsion energy86.803708
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/CEP-121G*
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 3409 3080 23.51      
2 A1 3248 2934 8.05      
3 A1 1874 1693 36.75      
4 A1 1575 1423 1.15      
5 A1 1515 1369 20.08      
6 A1 1320 1192 1.62      
7 A1 1103 996 2.64      
8 A1 1010 912 15.54      
9 A2 1268 1145 0.00      
10 A2 1026 927 0.00      
11 A2 581 525 0.00      
12 B1 3296 2978 5.21      
13 B1 1132 1023 29.89      
14 B1 913 825 6.04      
15 B1 383 346 38.41      
16 B2 3394 3066 10.22      
17 B2 1940 1752 0.44      
18 B2 1543 1394 56.20      
19 B2 1362 1231 3.57      
20 B2 1161 1049 50.34      
21 B2 991 895 68.31      

Unscaled Zero Point Vibrational Energy (zpe) 17021.8 cm-1
Scaled (by 0.9034) Zero Point Vibrational Energy (zpe) 15377.5 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/CEP-121G*
ABC
0.36157 0.30820 0.17179

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.200
N2 0.000 0.997 0.274
N3 0.000 -0.997 0.274
C4 0.000 0.732 -0.937
C5 0.000 -0.732 -0.937
H6 -0.890 0.000 1.820
H7 0.890 0.000 1.820
H8 0.000 1.466 -1.722
H9 0.000 -1.466 -1.722

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.36101.36102.25862.25861.08461.08463.26923.2692
N21.36101.99451.23962.11062.04382.04382.05033.1702
N31.36101.99452.11061.23962.04382.04383.17022.0503
C42.25861.23962.11061.46322.98792.98791.07502.3333
C52.25862.11061.23961.46322.98792.98792.33331.0750
H61.08462.04382.04382.98792.98791.77983.93543.9354
H71.08462.04382.04382.98792.98791.77983.93543.9354
H83.26922.05033.17021.07502.33333.93543.93542.9311
H93.26923.17022.05032.33331.07503.93543.93542.9311

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 120.504 C1 N3 C5 120.504
N2 C1 N3 94.238 N2 C1 H6 112.892
N2 C1 H7 112.892 N2 C4 C5 102.377
N2 C4 H8 124.563 N3 C1 H6 112.892
N3 C1 H7 112.892 N3 C5 C4 102.377
N3 C5 H9 124.563 C4 C5 H9 133.061
C5 C4 H8 133.061 H6 C1 H7 110.268
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.383      
2 N -0.020      
3 N -0.020      
4 C -0.221      
5 C -0.221      
6 H 0.224      
7 H 0.224      
8 H 0.209      
9 H 0.209      


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 -1.149 1.149
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.539 0.000 0.000
y 0.000 -35.624 0.000
z 0.000 0.000 -21.369
Traceless
 xyz
x -0.042 0.000 0.000
y 0.000 -10.670 0.000
z 0.000 0.000 10.712
Polar
3z2-r221.425
x2-y27.086
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.892 0.000 0.000
y 0.000 4.968 0.000
z 0.000 0.000 7.912


<r2> (average value of r2) Å2
<r2> 64.003
(<r2>)1/2 8.000