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

using model chemistry: B1B95/6-31+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 B1B95/6-31+G**
 hartrees
Energy at 0K-226.042339
Energy at 298.15K-226.048347
HF Energy-226.042339
Nuclear repulsion energy167.084523
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 B1B95/6-31+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 3267 3126 13.27      
2 A1 3095 2961 0.70      
3 A1 1742 1666 19.75      
4 A1 1428 1366 0.02      
5 A1 1388 1328 34.06      
6 A1 1270 1215 4.77      
7 A1 1049 1004 0.76      
8 A1 934 893 9.98      
9 A2 1146 1097 0.00      
10 A2 922 882 0.00      
11 A2 545 521 0.00      
12 B1 3139 3002 1.40      
13 B1 1003 960 22.47      
14 B1 829 793 4.94      
15 B1 366 350 42.01      
16 B2 3252 3111 4.83      
17 B2 1815 1737 1.04      
18 B2 1409 1347 39.78      
19 B2 1245 1191 1.07      
20 B2 1091 1044 35.55      
21 B2 919 879 70.33      

Unscaled Zero Point Vibrational Energy (zpe) 15926.6 cm-1
Scaled (by 0.9566) Zero Point Vibrational Energy (zpe) 15235.4 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 B1B95/6-31+G**
ABC
0.36380 0.30561 0.17150

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.197
N2 0.000 0.996 0.281
N3 0.000 -0.996 0.281
C4 0.000 0.724 -0.944
C5 0.000 -0.724 -0.944
H6 -0.892 0.000 1.831
H7 0.892 0.000 1.831
H8 0.000 1.469 -1.728
H9 0.000 -1.469 -1.728

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.35351.35352.26002.26001.09371.09373.27323.2732
N21.35351.99291.25482.11192.04662.04662.06383.1804
N31.35351.99292.11191.25482.04662.04663.18042.0638
C42.26001.25482.11191.44783.00273.00271.08172.3290
C52.26002.11191.25481.44783.00273.00272.32901.0817
H61.09372.04662.04663.00273.00271.78313.95173.9517
H71.09372.04662.04663.00273.00271.78313.95173.9517
H83.27322.06383.18041.08172.32903.95173.95172.9383
H93.27323.18042.06382.32901.08173.95173.95172.9383

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 120.045 C1 N3 C5 120.045
N2 C1 N3 94.817 N2 C1 H6 113.079
N2 C1 H7 113.079 N2 C4 C5 102.546
N2 C4 H8 123.906 N3 C1 H6 113.079
N3 C1 H7 113.079 N3 C5 C4 102.546
N3 C5 H9 123.906 C4 C5 H9 133.548
C5 C4 H8 133.548 H6 C1 H7 109.209
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.161      
2 N -0.261      
3 N -0.261      
4 C -0.026      
5 C -0.026      
6 H 0.207      
7 H 0.207      
8 H 0.161      
9 H 0.161      


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 -0.780 0.780
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.517 0.000 0.000
y 0.000 -36.186 0.000
z 0.000 0.000 -21.545
Traceless
 xyz
x 0.348 0.000 0.000
y 0.000 -11.154 0.000
z 0.000 0.000 10.806
Polar
3z2-r221.613
x2-y27.668
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.470 0.000 0.000
y 0.000 6.613 0.000
z 0.000 0.000 8.456


<r2> (average value of r2) Å2
<r2> 77.119
(<r2>)1/2 8.782