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

using model chemistry: B1B95/STO-3G

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/STO-3G
 hartrees
Energy at 0K-223.145860
Energy at 298.15K-223.151537
HF Energy-223.145860
Nuclear repulsion energy164.054608
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/STO-3G
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 3508 3098 15.01      
2 A1 3347 2956 34.61      
3 A1 1811 1599 8.88      
4 A1 1524 1346 15.28      
5 A1 1417 1251 6.82      
6 A1 1340 1183 8.35      
7 A1 1072 947 1.44      
8 A1 938 828 9.07      
9 A2 1179 1041 0.00      
10 A2 902 796 0.00      
11 A2 553 488 0.00      
12 B1 3449 3045 19.04      
13 B1 1041 919 4.62      
14 B1 820 724 4.71      
15 B1 301 266 35.79      
16 B2 3490 3081 1.09      
17 B2 1873 1654 1.71      
18 B2 1393 1230 3.38      
19 B2 1269 1121 7.80      
20 B2 1097 969 11.57      
21 B2 948 837 66.14      

Unscaled Zero Point Vibrational Energy (zpe) 16635.7 cm-1
Scaled (by 0.883) Zero Point Vibrational Energy (zpe) 14689.3 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/STO-3G
ABC
0.35818 0.28908 0.16524

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/STO-3G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.245
N2 0.000 0.999 0.281
N3 0.000 -0.999 0.281
C4 0.000 0.734 -0.969
C5 0.000 -0.734 -0.969
H6 -0.913 0.000 1.872
H7 0.913 0.000 1.872
H8 0.000 1.493 -1.760
H9 0.000 -1.493 -1.760

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.38881.38882.33212.33211.10781.10783.35573.3557
N21.38881.99871.27722.13652.08942.08942.09993.2213
N31.38881.99872.13651.27722.08942.08943.22132.0999
C42.33211.27722.13651.46763.07293.07291.09682.3631
C52.33212.13651.27721.46763.07293.07292.36311.0968
H61.10782.08942.08943.07293.07291.82614.03214.0321
H71.10782.08942.08943.07293.07291.82614.03214.0321
H83.35572.09993.22131.09682.36314.03214.03212.9854
H93.35573.22132.09992.36311.09684.03214.03212.9854

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 121.976 C1 N3 C5 121.976
N2 C1 N3 92.045 N2 C1 H6 113.152
N2 C1 H7 113.152 N2 C4 C5 102.002
N2 C4 H8 124.213 N3 C1 H6 113.152
N3 C1 H7 113.152 N3 C5 C4 102.002
N3 C5 H9 124.213 C4 C5 H9 133.786
C5 C4 H8 133.786 H6 C1 H7 111.024
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.014      
2 N -0.251      
3 N -0.251      
4 C 0.005      
5 C 0.005      
6 H 0.147      
7 H 0.147      
8 H 0.106      
9 H 0.106      


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 -0.186 0.186
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.947 0.000 0.000
y 0.000 -32.009 0.000
z 0.000 0.000 -21.334
Traceless
 xyz
x 0.725 0.000 0.000
y 0.000 -8.369 0.000
z 0.000 0.000 7.644
Polar
3z2-r215.288
x2-y26.063
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.595 0.000 0.000
y 0.000 2.582 0.000
z 0.000 0.000 5.156


<r2> (average value of r2) Å2
<r2> 77.945
(<r2>)1/2 8.829