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

using model chemistry: HF/CEP-31G*

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/CEP-31G*
 hartrees
Energy at 0K-38.042154
Energy at 298.15K-38.048313
HF Energy-38.042154
Nuclear repulsion energy86.522762
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/CEP-31G*
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 3438 3087 25.53      
2 A1 3279 2944 14.48      
3 A1 1904 1710 40.60      
4 A1 1573 1412 0.30      
5 A1 1518 1363 21.77      
6 A1 1333 1197 1.40      
7 A1 1117 1003 0.79      
8 A1 1002 900 19.20      
9 A2 1261 1132 0.00      
10 A2 1021 917 0.00      
11 A2 578 519 0.00      
12 B1 3327 2987 11.82      
13 B1 1125 1010 29.20      
14 B1 914 821 4.94      
15 B1 366 329 41.82      
16 B2 3420 3071 10.75      
17 B2 1961 1761 0.74      
18 B2 1550 1391 62.91      
19 B2 1349 1212 5.47      
20 B2 1167 1048 45.97      
21 B2 978 878 66.66      

Unscaled Zero Point Vibrational Energy (zpe) 17089.1 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 15346.0 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/CEP-31G*
ABC
0.35986 0.30570 0.17067

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.204
N2 0.000 0.997 0.277
N3 0.000 -0.997 0.277
C4 0.000 0.736 -0.942
C5 0.000 -0.736 -0.942
H6 -0.894 0.000 1.825
H7 0.894 0.000 1.825
H8 0.000 1.476 -1.726
H9 0.000 -1.476 -1.726

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.36161.36162.26812.26811.08821.08823.28043.2804
N21.36161.99471.24642.11852.04682.04682.05913.1824
N31.36161.99472.11851.24642.04682.04683.18242.0591
C42.26811.24642.11851.47132.99892.99891.07842.3465
C52.26812.11851.24641.47132.99892.99892.34651.0784
H61.08822.04682.04682.99892.99891.78723.94763.9476
H71.08822.04682.04682.99892.99891.78723.94763.9476
H83.28042.05913.18241.07842.34653.94763.94762.9519
H93.28043.18242.05912.34651.07843.94763.94762.9519

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 120.786 C1 N3 C5 120.786
N2 C1 N3 94.189 N2 C1 H6 112.861
N2 C1 H7 112.861 N2 C4 C5 102.120
N2 C4 H8 124.529 N3 C1 H6 112.861
N3 C1 H7 112.861 N3 C5 C4 102.120
N3 C5 H9 124.529 C4 C5 H9 133.352
C5 C4 H8 133.352 H6 C1 H7 110.409
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.523      
2 N 0.214      
3 N 0.214      
4 C -0.414      
5 C -0.414      
6 H 0.206      
7 H 0.206      
8 H 0.255      
9 H 0.255      


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 -1.196 1.196
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.429 0.000 0.000
y 0.000 -35.717 0.000
z 0.000 0.000 -21.238
Traceless
 xyz
x 0.049 0.000 0.000
y 0.000 -10.883 0.000
z 0.000 0.000 10.835
Polar
3z2-r221.669
x2-y27.288
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.459 0.000 0.000
y 0.000 4.774 0.000
z 0.000 0.000 7.545


<r2> (average value of r2) Å2
<r2> 64.281
(<r2>)1/2 8.018