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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-37.924851
Energy at 298.15K-37.931100
HF Energy-37.924851
Nuclear repulsion energy86.131022
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 3435 3135 10.19      
2 A1 3246 2962 0.45      
3 A1 1813 1654 28.42      
4 A1 1572 1434 15.47      
5 A1 1493 1362 16.97      
6 A1 1315 1200 4.86      
7 A1 1105 1008 4.39      
8 A1 1017 928 12.30      
9 A2 1268 1157 0.00      
10 A2 996 909 0.00      
11 A2 597 544 0.00      
12 B1 3306 3017 1.28      
13 B1 1146 1045 25.96      
14 B1 915 835 14.91      
15 B1 405 369 52.43      
16 B2 3417 3118 6.14      
17 B2 1882 1718 0.06      
18 B2 1498 1367 23.66      
19 B2 1366 1247 5.85      
20 B2 1150 1049 62.97      
21 B2 1019 930 70.96      

Unscaled Zero Point Vibrational Energy (zpe) 16979.3 cm-1
Scaled (by 0.9125) Zero Point Vibrational Energy (zpe) 15493.6 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
0.35993 0.29970 0.16870

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 1.220
N2 0.000 0.998 0.278
N3 0.000 -0.998 0.278
C4 0.000 0.737 -0.952
C5 0.000 -0.737 -0.952
H6 -0.885 0.000 1.840
H7 0.885 0.000 1.840
H8 0.000 1.465 -1.733
H9 0.000 -1.465 -1.733

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.37231.37232.29372.29371.08051.08053.29663.2966
N21.37231.99661.25822.12702.05392.05392.06493.1805
N31.37231.99662.12701.25822.05392.05393.18052.0649
C42.29371.25822.12701.47303.02043.02041.06812.3362
C52.29372.12701.25821.47303.02043.02042.33621.0681
H61.08052.05392.05393.02043.02041.76953.96213.9621
H71.08052.05392.05393.02043.02041.76953.96213.9621
H83.29662.06493.18051.06812.33623.96213.96212.9308
H93.29663.18052.06492.33621.06813.96213.96212.9308

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 121.316 C1 N3 C5 121.316
N2 C1 N3 93.350 N2 C1 H6 113.195
N2 C1 H7 113.195 N2 C4 C5 102.009
N2 C4 H8 124.960 N3 C1 H6 113.195
N3 C1 H7 113.195 N3 C5 C4 102.009
N3 C5 H9 124.960 C4 C5 H9 133.032
C5 C4 H8 133.032 H6 C1 H7 109.936
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 -0.429      
2 N 0.014      
3 N 0.014      
4 C -0.227      
5 C -0.227      
6 H 0.236      
7 H 0.236      
8 H 0.192      
9 H 0.192      


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 -1.060 1.060
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.877 0.000 0.000
y 0.000 -37.410 0.000
z 0.000 0.000 -21.341
Traceless
 xyz
x 0.499 0.000 0.000
y 0.000 -12.301 0.000
z 0.000 0.000 11.802
Polar
3z2-r223.604
x2-y28.533
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.746 0.000 0.000
y 0.000 4.665 0.000
z 0.000 0.000 8.006


<r2> (average value of r2) Å2
<r2> 65.171
(<r2>)1/2 8.073