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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-226.026599
Energy at 298.15K-226.032614
HF Energy-226.026599
Nuclear repulsion energy167.203771
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 3269 3103 16.38      
2 A1 3103 2946 0.00      
3 A1 1759 1670 19.41      
4 A1 1440 1367 1.99      
5 A1 1410 1338 21.64      
6 A1 1279 1214 5.74      
7 A1 1053 1000 1.74      
8 A1 941 893 12.52      
9 A2 1159 1100 0.00      
10 A2 927 880 0.00      
11 A2 550 522 0.00      
12 B1 3146 2986 0.02      
13 B1 1015 964 17.12      
14 B1 832 789 3.54      
15 B1 372 353 40.89      
16 B2 3253 3088 11.32      
17 B2 1829 1737 0.09      
18 B2 1418 1346 34.63      
19 B2 1255 1191 0.90      
20 B2 1100 1044 30.58      
21 B2 924 877 75.58      

Unscaled Zero Point Vibrational Energy (zpe) 16016.5 cm-1
Scaled (by 0.9493) Zero Point Vibrational Energy (zpe) 15204.5 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
0.36370 0.30646 0.17175

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 1.196
N2 0.000 0.996 0.280
N3 0.000 -0.996 0.280
C4 0.000 0.724 -0.942
C5 0.000 -0.724 -0.942
H6 -0.892 0.000 1.829
H7 0.892 0.000 1.829
H8 0.000 1.470 -1.727
H9 0.000 -1.470 -1.727

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.35281.35282.25682.25681.09411.09413.27163.2716
N21.35281.99281.25232.11062.04622.04622.06293.1801
N31.35281.99282.11061.25232.04622.04623.18012.0629
C42.25681.25232.11061.44852.99982.99981.08292.3303
C52.25682.11061.25231.44852.99982.99982.33031.0829
H61.09412.04622.04622.99982.99981.78383.95033.9503
H71.09412.04622.04622.99982.99981.78383.95033.9503
H83.27162.06293.18011.08292.33033.95033.95032.9393
H93.27163.18012.06292.33031.08293.95033.95032.9393

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 120.013 C1 N3 C5 120.013
N2 C1 N3 94.872 N2 C1 H6 113.064
N2 C1 H7 113.064 N2 C4 C5 102.551
N2 C4 H8 123.949 N3 C1 H6 113.064
N3 C1 H7 113.064 N3 C5 C4 102.551
N3 C5 H9 123.949 C4 C5 H9 133.500
C5 C4 H8 133.500 H6 C1 H7 109.216
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 -0.071      
2 N -0.367      
3 N -0.367      
4 C -0.005      
5 C -0.005      
6 H 0.230      
7 H 0.230      
8 H 0.178      
9 H 0.178      


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 -0.604 0.604
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.814 0.000 0.000
y 0.000 -34.328 0.000
z 0.000 0.000 -21.461
Traceless
 xyz
x 0.080 0.000 0.000
y 0.000 -9.691 0.000
z 0.000 0.000 9.611
Polar
3z2-r219.221
x2-y26.514
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.338 0.000 0.000
y 0.000 4.975 0.000
z 0.000 0.000 7.769


<r2> (average value of r2) Å2
<r2> 76.492
(<r2>)1/2 8.746