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

using model chemistry: HF/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-224.740603
Energy at 298.15K-224.746820
HF Energy-224.740603
Nuclear repulsion energy167.861961
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/6-31+G**
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 3414 3087 13.76      
2 A1 3238 2928 2.42      
3 A1 1897 1715 32.94      
4 A1 1570 1419 1.21      
5 A1 1521 1375 23.87      
6 A1 1326 1199 1.53      
7 A1 1112 1005 2.00      
8 A1 1017 919 12.57      
9 A2 1264 1143 0.00      
10 A2 1032 933 0.00      
11 A2 586 530 0.00      
12 B1 3283 2968 0.95      
13 B1 1129 1021 31.34      
14 B1 919 831 5.70      
15 B1 393 355 42.92      
16 B2 3399 3073 5.77      
17 B2 1966 1778 0.33      
18 B2 1547 1399 45.61      
19 B2 1368 1237 3.02      
20 B2 1167 1055 52.12      
21 B2 996 901 65.73      

Unscaled Zero Point Vibrational Energy (zpe) 17070.3 cm-1
Scaled (by 0.9042) Zero Point Vibrational Energy (zpe) 15435.0 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 HF/6-31+G**
ABC
0.36365 0.31033 0.17291

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.195
N2 0.000 0.997 0.274
N3 0.000 -0.997 0.274
C4 0.000 0.726 -0.933
C5 0.000 -0.726 -0.933
H6 -0.889 0.000 1.814
H7 0.889 0.000 1.814
H8 0.000 1.456 -1.720
H9 0.000 -1.456 -1.720

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.35681.35682.24852.24851.08341.08343.25773.2577
N21.35681.99371.23732.10422.03852.03852.04613.1607
N31.35681.99372.10421.23732.03852.03853.16072.0461
C42.24851.23732.10421.45292.97772.97771.07252.3195
C52.24852.10421.23731.45292.97772.97772.31951.0725
H61.08342.03852.03852.97772.97771.77723.92413.9241
H71.08342.03852.03852.97772.97771.77723.92413.9241
H83.25772.04613.16071.07252.31953.92413.92412.9111
H93.25773.16072.04612.31951.07253.92413.92412.9111

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 120.098 C1 N3 C5 120.098
N2 C1 N3 94.560 N2 C1 H6 112.835
N2 C1 H7 112.835 N2 C4 C5 102.622
N2 C4 H8 124.552 N3 C1 H6 112.835
N3 C1 H7 112.835 N3 C5 C4 102.622
N3 C5 H9 124.552 C4 C5 H9 132.826
C5 C4 H8 132.826 H6 C1 H7 110.217
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.035      
2 N -0.336      
3 N -0.336      
4 C -0.004      
5 C -0.004      
6 H 0.180      
7 H 0.180      
8 H 0.177      
9 H 0.177      


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 -1.202 1.202
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.927 0.000 0.000
y 0.000 -36.489 0.000
z 0.000 0.000 -21.614
Traceless
 xyz
x 0.124 0.000 0.000
y 0.000 -11.218 0.000
z 0.000 0.000 11.094
Polar
3z2-r222.188
x2-y27.562
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.254 0.000 0.000
y 0.000 5.688 0.000
z 0.000 0.000 8.053


<r2> (average value of r2) Å2
<r2> 76.746
(<r2>)1/2 8.760