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All results from a given calculation for C3H4N2 (1H-Imidazole)

using model chemistry: HF/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/6-31G*
 hartrees
Energy at 0K-224.814429
Energy at 298.15K 
HF Energy-224.814429
Nuclear repulsion energy164.982910
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/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3921 3523 89.55      
2 A' 3475 3122 4.27      
3 A' 3447 3097 0.97      
4 A' 3445 3095 13.47      
5 A' 1745 1568 26.70      
6 A' 1666 1497 27.01      
7 A' 1588 1427 26.42      
8 A' 1505 1352 10.55      
9 A' 1411 1268 0.57      
10 A' 1258 1130 4.93      
11 A' 1235 1109 4.35      
12 A' 1192 1071 13.43      
13 A' 1158 1041 55.93      
14 A' 1022 918 1.70      
15 A' 985 885 7.58      
16 A" 999 898 0.25      
17 A" 965 867 15.91      
18 A" 839 754 45.67      
19 A" 733 659 11.64      
20 A" 693 623 7.28      
21 A" 535 481 145.28      

Unscaled Zero Point Vibrational Energy (zpe) 16907.4 cm-1
Scaled (by 0.8985) Zero Point Vibrational Energy (zpe) 15191.3 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 HF/6-31G*
ABC
0.33119 0.32154 0.16315

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.095 0.000
C2 -1.075 0.279 0.000
C3 1.110 0.289 0.000
N4 -0.741 -0.966 0.000
C5 0.630 -0.974 0.000
H6 -0.013 2.088 0.000
H7 -2.077 0.656 0.000
H8 2.103 0.682 0.000
H9 1.182 -1.890 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.34931.37192.19022.16260.99322.12302.14353.2108
C21.34932.18461.28902.11592.09761.07093.20343.1305
C31.37192.18462.23611.35032.12103.20801.06842.1800
N42.19021.28902.23611.37153.13972.10133.28722.1339
C52.16262.11591.35031.37153.12863.16012.21581.0699
H60.99322.09762.12103.13973.12862.51242.54084.1539
H72.12301.07093.20802.10133.16012.51244.18054.1360
H82.14353.20341.06843.28722.21582.54084.18052.7319
H93.21083.13052.18002.13391.06994.15394.13602.7319

picture of 1H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 N4 112.205 N1 C2 H7 122.193
N1 C3 C5 105.202 N1 C3 H8 122.410
C2 N1 C3 106.795 C2 N1 H6 126.466
C2 N4 C5 105.321 C3 N1 H6 126.739
C3 C5 N4 110.477 C3 C5 H9 128.146
N4 C2 H7 125.602 N4 C5 H9 121.378
C5 C3 H8 132.387
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.713      
2 C 0.268      
3 C -0.013      
4 N -0.514      
5 C -0.056      
6 H 0.399      
7 H 0.211      
8 H 0.219      
9 H 0.199      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.147 3.689 0.000 3.863
CHELPG 1.137 3.611 0.000 3.786
AIM -0.699 0.475 0.000 0.846
ESP 1.130 3.658 0.000 3.829


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.010 -3.545 0.000
y -3.545 -25.499 0.000
z 0.000 0.000 -31.693
Traceless
 xyz
x 2.586 -3.545 0.000
y -3.545 3.353 0.000
z 0.000 0.000 -5.938
Polar
3z2-r2-11.877
x2-y2-0.511
xy-3.545
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.475 -0.117 0.000
y -0.117 6.442 0.000
z 0.000 0.000 2.546


<r2> (average value of r2) Å2
<r2> 78.412
(<r2>)1/2 8.855