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

using model chemistry: B2PLYP/aug-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 B2PLYP/aug-cc-pVTZ
 hartrees
Energy at 0K-226.024067
Energy at 298.15K-226.030101
HF Energy-225.734098
Nuclear repulsion energy166.919330
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 B2PLYP/aug-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 3243 3117 12.62      
2 A1 3079 2959 0.29      
3 A1 1676 1611 23.63      
4 A1 1419 1364 6.04      
5 A1 1394 1339 22.58      
6 A1 1252 1203 3.80      
7 A1 1035 995 1.15      
8 A1 933 897 10.52      
9 A2 1154 1109 0.00      
10 A2 929 893 0.00      
11 A2 548 526 0.00      
12 B1 3118 2997 1.32      
13 B1 1013 974 21.87      
14 B1 834 802 5.40      
15 B1 369 355 36.28      
16 B2 3230 3104 3.23      
17 B2 1745 1677 0.32      
18 B2 1385 1331 34.88      
19 B2 1250 1202 2.05      
20 B2 1083 1040 38.61      
21 B2 937 900 63.73      

Unscaled Zero Point Vibrational Energy (zpe) 15813.2 cm-1
Scaled (by 0.961) Zero Point Vibrational Energy (zpe) 15196.5 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 B2PLYP/aug-cc-pVTZ
ABC
0.36325 0.30470 0.17109

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/aug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.201
N2 0.000 0.997 0.281
N3 0.000 -0.997 0.281
C4 0.000 0.726 -0.945
C5 0.000 -0.726 -0.945
H6 -0.891 0.000 1.829
H7 0.891 0.000 1.829
H8 0.000 1.468 -1.727
H9 0.000 -1.468 -1.727

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.35621.35622.26552.26551.09051.09053.27563.2756
N21.35621.99351.25622.11442.04552.04552.06303.1798
N31.35621.99352.11441.25622.04552.04553.17982.0630
C42.26551.25622.11441.45113.00313.00311.07852.3292
C52.26552.11441.25621.45113.00313.00312.32921.0785
H61.09052.04552.04553.00313.00311.78283.94943.9494
H71.09052.04552.04553.00313.00311.78283.94943.9494
H83.27562.06303.17981.07852.32923.94943.94942.9369
H93.27563.17982.06302.32921.07853.94943.94942.9369

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 120.228 C1 N3 C5 120.228
N2 C1 N3 94.609 N2 C1 H6 112.994
N2 C1 H7 112.994 N2 C4 C5 102.468
N2 C4 H8 123.994 N3 C1 H6 112.994
N3 C1 H7 112.994 N3 C5 C4 102.468
N3 C5 H9 123.994 C4 C5 H9 133.538
C5 C4 H8 133.538 H6 C1 H7 109.651
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.255      
2 N -0.395      
3 N -0.395      
4 C -0.352      
5 C -0.352      
6 H 0.334      
7 H 0.334      
8 H 0.540      
9 H 0.540      


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 -0.915 0.915
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.821 0.000 0.000
y 0.000 -36.314 0.000
z 0.000 0.000 -22.070
Traceless
 xyz
x 0.371 0.000 0.000
y 0.000 -10.869 0.000
z 0.000 0.000 10.497
Polar
3z2-r220.995
x2-y27.493
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.975 0.000 0.000
y 0.000 7.267 0.000
z 0.000 0.000 8.646


<r2> (average value of r2) Å2
<r2> 77.425
(<r2>)1/2 8.799