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

using model chemistry: B1B95/aug-cc-pVDZ

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/aug-cc-pVDZ
 hartrees
Energy at 0K-226.060545
Energy at 298.15K-226.066567
HF Energy-226.060545
Nuclear repulsion energy166.967867
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/aug-cc-pVDZ
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 3252 3115 14.67      
2 A1 3092 2962 0.34      
3 A1 1732 1659 19.25      
4 A1 1421 1361 0.57      
5 A1 1371 1313 35.42      
6 A1 1270 1217 4.48      
7 A1 1046 1002 0.34      
8 A1 935 896 11.13      
9 A2 1134 1087 0.00      
10 A2 920 882 0.00      
11 A2 545 522 0.00      
12 B1 3138 3005 1.57      
13 B1 995 953 22.92      
14 B1 828 794 4.45      
15 B1 368 352 37.50      
16 B2 3236 3100 4.44      
17 B2 1804 1728 0.35      
18 B2 1402 1343 37.91      
19 B2 1230 1178 1.13      
20 B2 1084 1038 31.14      
21 B2 922 883 69.29      

Unscaled Zero Point Vibrational Energy (zpe) 15861.8 cm-1
Scaled (by 0.9579) Zero Point Vibrational Energy (zpe) 15194.0 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/aug-cc-pVDZ
ABC
0.36330 0.30522 0.17131

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/aug-cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.198
N2 0.000 0.996 0.281
N3 0.000 -0.996 0.281
C4 0.000 0.725 -0.944
C5 0.000 -0.725 -0.944
H6 -0.895 0.000 1.832
H7 0.895 0.000 1.832
H8 0.000 1.473 -1.731
H9 0.000 -1.473 -1.731

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.35361.35362.26072.26071.09691.09693.27833.2783
N21.35361.99291.25512.11282.04902.04902.06823.1859
N31.35361.99292.11281.25512.04902.04903.18592.0682
C42.26071.25512.11281.44943.00553.00551.08632.3347
C52.26072.11281.25511.44943.00553.00552.33471.0863
H61.09692.04902.04903.00553.00551.78913.95843.9584
H71.09692.04902.04903.00553.00551.78913.95843.9584
H83.27832.06823.18591.08632.33473.95843.95842.9465
H93.27833.18592.06822.33471.08633.95843.95842.9465

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 120.089 C1 N3 C5 120.089
N2 C1 N3 94.813 N2 C1 H6 113.059
N2 C1 H7 113.059 N2 C4 C5 102.505
N2 C4 H8 123.937 N3 C1 H6 113.059
N3 C1 H7 113.059 N3 C5 C4 102.505
N3 C5 H9 123.937 C4 C5 H9 133.558
C5 C4 H8 133.558 H6 C1 H7 109.276
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 1.031      
2 N -0.356      
3 N -0.356      
4 C 0.419      
5 C 0.419      
6 H -0.291      
7 H -0.291      
8 H -0.287      
9 H -0.287      


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 -0.822 0.822
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.525 0.000 0.000
y 0.000 -35.769 0.000
z 0.000 0.000 -21.747
Traceless
 xyz
x 0.233 0.000 0.000
y 0.000 -10.633 0.000
z 0.000 0.000 10.400
Polar
3z2-r220.800
x2-y27.244
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.897 0.000 0.000
y 0.000 7.144 0.000
z 0.000 0.000 8.717


<r2> (average value of r2) Å2
<r2> 77.171
(<r2>)1/2 8.785