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

using model chemistry: HF/LANL2DZ

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/LANL2DZ
 hartrees
Energy at 0K-224.630634
Energy at 298.15K-224.636887
HF Energy-224.630634
Nuclear repulsion energy166.331022
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/LANL2DZ
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 3496 3146 10.97      
2 A1 3285 2956 0.98      
3 A1 1838 1654 28.55      
4 A1 1584 1425 19.29      
5 A1 1500 1350 17.65      
6 A1 1319 1187 3.58      
7 A1 1109 998 4.93      
8 A1 1026 923 13.63      
9 A2 1265 1138 0.00      
10 A2 1031 928 0.00      
11 A2 607 546 0.00      
12 B1 3344 3009 0.89      
13 B1 1150 1035 23.65      
14 B1 925 833 15.14      
15 B1 422 379 55.92      
16 B2 3479 3130 5.05      
17 B2 1911 1720 0.02      
18 B2 1505 1354 20.70      
19 B2 1380 1242 4.43      
20 B2 1155 1039 68.98      
21 B2 1029 926 71.66      

Unscaled Zero Point Vibrational Energy (zpe) 17179.5 cm-1
Scaled (by 0.8999) Zero Point Vibrational Energy (zpe) 15459.8 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/LANL2DZ
ABC
0.36079 0.30152 0.16944

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/LANL2DZ

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
C11.36981.36982.28622.28621.07881.07883.28713.2871
N21.36981.99621.25472.12322.05042.05042.05953.1732
N31.36981.99622.12321.25472.05042.05043.17322.0595
C42.28621.25472.12321.46973.01273.01271.06502.3291
C52.28622.12321.25471.46973.01273.01272.32911.0650
H61.07882.05042.05043.01273.01271.76523.95263.9526
H71.07882.05042.05043.01273.01271.76523.95263.9526
H83.28712.05953.17321.06502.32913.95263.95262.9194
H93.28713.17322.05952.32911.06503.95263.95262.9194

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 121.115 C1 N3 C5 121.115
N2 C1 N3 93.548 N2 C1 H6 113.194
N2 C1 H7 113.194 N2 C4 C5 102.111
N2 C4 H8 124.999 N3 C1 H6 113.194
N3 C1 H7 113.194 N3 C5 C4 102.111
N3 C5 H9 124.999 C4 C5 H9 132.890
C5 C4 H8 132.890 H6 C1 H7 109.792
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/LANL2DZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.340      
2 N -0.149      
3 N -0.149      
4 C -0.185      
5 C -0.185      
6 H 0.261      
7 H 0.261      
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 -1.057 1.057
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.056 0.000 0.000
y 0.000 -37.506 0.000
z 0.000 0.000 -21.585
Traceless
 xyz
x 0.490 0.000 0.000
y 0.000 -12.186 0.000
z 0.000 0.000 11.696
Polar
3z2-r223.392
x2-y28.450
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.162 0.000 0.000
y 0.000 4.403 0.000
z 0.000 0.000 7.621


<r2> (average value of r2) Å2
<r2> 78.079
(<r2>)1/2 8.836