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

using model chemistry: HF/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-224.806507
Energy at 298.15K-224.812755
HF Energy-224.806507
Nuclear repulsion energy168.259621
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/cc-pVTZ
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 3374 3071 17.85      
2 A1 3212 2924 5.74      
3 A1 1883 1713 34.83      
4 A1 1562 1422 1.76      
5 A1 1515 1379 21.42      
6 A1 1317 1199 1.18      
7 A1 1103 1003 2.43      
8 A1 1019 928 15.76      
9 A2 1266 1152 0.00      
10 A2 1051 957 0.00      
11 A2 594 541 0.00      
12 B1 3250 2958 1.68      
13 B1 1132 1030 28.20      
14 B1 926 843 4.87      
15 B1 402 366 37.52      
16 B2 3358 3056 8.15      
17 B2 1950 1774 0.00      
18 B2 1538 1400 42.49      
19 B2 1368 1245 2.58      
20 B2 1161 1056 48.76      
21 B2 1000 911 68.20      

Unscaled Zero Point Vibrational Energy (zpe) 16989.7 cm-1
Scaled (by 0.9101) Zero Point Vibrational Energy (zpe) 15462.4 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/cc-pVTZ
ABC
0.36402 0.31271 0.17369

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.190
N2 0.000 0.997 0.272
N3 0.000 -0.997 0.272
C4 0.000 0.726 -0.929
C5 0.000 -0.726 -0.929
H6 -0.886 0.000 1.811
H7 0.886 0.000 1.811
H8 0.000 1.452 -1.716
H9 0.000 -1.452 -1.716

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.35501.35502.24002.24001.08191.08193.24913.2491
N21.35501.99331.23112.10022.03632.03632.04003.1547
N31.35501.99332.10021.23112.03632.03633.15472.0400
C42.24001.23112.10021.45242.96972.96971.07122.3166
C52.24002.10021.23111.45242.96972.96972.31661.0712
H61.08192.03632.03632.96972.96971.77223.91613.9161
H71.08192.03632.03632.96972.96971.77223.91613.9161
H83.24912.04003.15471.07122.31663.91613.91612.9050
H93.24913.15472.04002.31661.07123.91613.91612.9050

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 119.958 C1 N3 C5 119.958
N2 C1 N3 94.705 N2 C1 H6 112.877
N2 C1 H7 112.877 N2 C4 C5 102.689
N2 C4 H8 124.621 N3 C1 H6 112.877
N3 C1 H7 112.877 N3 C5 C4 102.689
N3 C5 H9 124.621 C4 C5 H9 132.690
C5 C4 H8 132.690 H6 C1 H7 109.966
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.025      
2 N -0.195      
3 N -0.195      
4 C -0.120      
5 C -0.120      
6 H 0.124      
7 H 0.124      
8 H 0.179      
9 H 0.179      


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 -1.143 1.143
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.550 0.000 0.000
y 0.000 -35.234 0.000
z 0.000 0.000 -21.749
Traceless
 xyz
x -0.059 0.000 0.000
y 0.000 -10.085 0.000
z 0.000 0.000 10.143
Polar
3z2-r220.287
x2-y26.684
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.095 0.000 0.000
y 0.000 5.374 0.000
z 0.000 0.000 7.907


<r2> (average value of r2) Å2
<r2> 76.171
(<r2>)1/2 8.728