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

using model chemistry: HF/SDD

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/SDD
 hartrees
Energy at 0K-224.631142
Energy at 298.15K-224.637396
HF Energy-224.631142
Nuclear repulsion energy166.336857
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/SDD
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 3495 3147 10.83      
2 A1 3283 2956 0.87      
3 A1 1837 1654 28.85      
4 A1 1584 1426 19.33      
5 A1 1500 1350 17.72      
6 A1 1319 1188 3.58      
7 A1 1109 998 4.93      
8 A1 1026 924 13.56      
9 A2 1266 1140 0.00      
10 A2 1030 928 0.00      
11 A2 606 546 0.00      
12 B1 3341 3009 0.77      
13 B1 1150 1036 23.59      
14 B1 925 833 15.07      
15 B1 421 379 55.84      
16 B2 3477 3131 4.90      
17 B2 1911 1720 0.02      
18 B2 1505 1355 20.50      
19 B2 1380 1243 4.43      
20 B2 1154 1039 68.96      
21 B2 1029 927 71.60      

Unscaled Zero Point Vibrational Energy (zpe) 17174.4 cm-1
Scaled (by 0.9004) Zero Point Vibrational Energy (zpe) 15463.9 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 HF/SDD
ABC
0.36082 0.30155 0.16945

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/SDD

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.216
N2 0.000 0.998 0.277
N3 0.000 -0.998 0.277
C4 0.000 0.735 -0.949
C5 0.000 -0.735 -0.949
H6 -0.883 0.000 1.836
H7 0.883 0.000 1.836
H8 0.000 1.460 -1.730
H9 0.000 -1.460 -1.730

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.36981.36982.28612.28611.07881.07883.28703.2870
N21.36981.99621.25462.12312.05052.05052.05943.1730
N31.36981.99622.12311.25462.05052.05053.17302.0594
C42.28611.25462.12311.46953.01273.01271.06502.3290
C52.28612.12311.25461.46953.01273.01272.32901.0650
H61.07882.05052.05053.01273.01271.76523.95253.9525
H71.07882.05052.05053.01273.01271.76523.95253.9525
H83.28702.05943.17301.06502.32903.95253.95252.9191
H93.28703.17302.05942.32901.06503.95253.95252.9191

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 121.112 C1 N3 C5 121.112
N2 C1 N3 93.545 N2 C1 H6 113.195
N2 C1 H7 113.195 N2 C4 C5 102.116
N2 C4 H8 124.999 N3 C1 H6 113.195
N3 C1 H7 113.195 N3 C5 C4 102.116
N3 C5 H9 124.999 C4 C5 H9 132.885
C5 C4 H8 132.885 H6 C1 H7 109.790
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.353      
2 N -0.149      
3 N -0.149      
4 C -0.183      
5 C -0.183      
6 H 0.265      
7 H 0.265      
8 H 0.243      
9 H 0.243      


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 -1.054 1.054
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.058 0.000 0.000
y 0.000 -37.487 0.000
z 0.000 0.000 -21.574
Traceless
 xyz
x 0.473 0.000 0.000
y 0.000 -12.171 0.000
z 0.000 0.000 11.698
Polar
3z2-r223.396
x2-y28.430
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.183 0.000 0.000
y 0.000 4.404 0.000
z 0.000 0.000 7.622


<r2> (average value of r2) Å2
<r2> 78.069
(<r2>)1/2 8.836