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

using model chemistry: B1B95/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B1B95/6-31G
 hartrees
Energy at 0K-225.936851
Energy at 298.15K-225.942935
HF Energy-225.936851
Nuclear repulsion energy166.036608
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 B1B95/6-31G
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 3323 3169 9.35      
2 A1 3128 2983 2.09      
3 A1 1714 1635 22.20      
4 A1 1451 1384 26.03      
5 A1 1395 1330 5.66      
6 A1 1270 1211 9.65      
7 A1 1052 1004 6.32      
8 A1 947 903 9.09      
9 A2 1167 1113 0.00      
10 A2 940 896 0.00      
11 A2 568 542 0.00      
12 B1 3178 3031 0.88      
13 B1 1041 992 17.11      
14 B1 852 812 9.53      
15 B1 400 381 54.59      
16 B2 3306 3153 7.63      
17 B2 1781 1698 0.05      
18 B2 1365 1302 11.67      
19 B2 1275 1216 1.91      
20 B2 1096 1045 38.55      
21 B2 950 906 81.22      

Unscaled Zero Point Vibrational Energy (zpe) 16099.0 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 15353.6 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 B1B95/6-31G
ABC
0.36163 0.29969 0.16912

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.213
N2 0.000 0.998 0.282
N3 0.000 -0.998 0.282
C4 0.000 0.730 -0.954
C5 0.000 -0.730 -0.954
H6 -0.890 0.000 1.844
H7 0.890 0.000 1.844
H8 0.000 1.469 -1.737
H9 0.000 -1.469 -1.737

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.36431.36432.28652.28651.09061.09063.29573.2957
N21.36431.99521.26462.12452.05562.05562.07383.1877
N31.36431.99522.12451.26462.05562.05563.18772.0738
C42.28651.26462.12451.46073.02523.02521.07672.3345
C52.28652.12451.26461.46073.02523.02522.33451.0767
H61.09062.05562.05563.02523.02521.77903.97173.9717
H71.09062.05562.05563.02523.02521.77903.97173.9717
H83.29572.07383.18771.07672.33453.97173.97172.9376
H93.29573.18772.07382.33451.07673.97173.97172.9376

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 120.812 C1 N3 C5 120.812
N2 C1 N3 93.973 N2 C1 H6 113.247
N2 C1 H7 113.247 N2 C4 C5 102.201
N2 C4 H8 124.496 N3 C1 H6 113.247
N3 C1 H7 113.247 N3 C5 C4 102.201
N3 C5 H9 124.496 C4 C5 H9 133.303
C5 C4 H8 133.303 H6 C1 H7 109.297
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.100      
2 N -0.388      
3 N -0.388      
4 C -0.010      
5 C -0.010      
6 H 0.255      
7 H 0.255      
8 H 0.193      
9 H 0.193      


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 -0.555 0.555
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.041 0.000 0.000
y 0.000 -35.960 0.000
z 0.000 0.000 -21.223
Traceless
 xyz
x 0.551 0.000 0.000
y 0.000 -11.328 0.000
z 0.000 0.000 10.777
Polar
3z2-r221.553
x2-y27.919
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.178 0.000 0.000
y 0.000 4.724 0.000
z 0.000 0.000 7.757


<r2> (average value of r2) Å2
<r2> 77.670
(<r2>)1/2 8.813