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

using model chemistry: HF/STO-3G

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/STO-3G
 hartrees
Energy at 0K-221.987995
Energy at 298.15K-221.993970
HF Energy-221.987995
Nuclear repulsion energy162.191898
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/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 A' 4133 3374 95.99      
2 A' 3794 3098 10.46      
3 A' 3757 3068 24.79      
4 A' 3752 3063 26.41      
5 A' 1843 1505 17.99      
6 A' 1774 1449 24.47      
7 A' 1691 1381 11.41      
8 A' 1588 1297 14.63      
9 A' 1437 1174 0.31      
10 A' 1308 1068 5.57      
11 A' 1275 1041 7.97      
12 A' 1234 1008 9.29      
13 A' 1209 987 24.73      
14 A' 1044 852 0.90      
15 A' 1014 828 5.03      
16 A" 1072 875 0.21      
17 A" 975 796 2.88      
18 A" 919 750 10.44      
19 A" 732 598 3.02      
20 A" 701 572 4.97      
21 A" 486 397 111.88      

Unscaled Zero Point Vibrational Energy (zpe) 17868.3 cm-1
Scaled (by 0.8165) Zero Point Vibrational Energy (zpe) 14589.5 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/STO-3G
ABC
0.32058 0.31034 0.15769

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.113 0.000
C2 -1.101 0.275 0.000
C3 1.123 0.291 0.000
N4 -0.755 -0.995 0.000
C5 0.655 -0.972 0.000
H6 -0.009 2.134 0.000
H7 -2.112 0.664 0.000
H8 2.123 0.695 0.000
H9 1.226 -1.888 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.38401.39112.23922.18591.02092.15972.16413.2420
C21.38402.22391.31612.15432.15631.08333.25183.1773
C31.39112.22392.27611.34722.16223.25631.07912.1819
N42.23921.31612.27611.41083.21672.14293.33792.1734
C52.18592.15431.34721.41083.17653.21502.22141.0791
H61.02092.15632.16223.21673.17652.56662.57234.2074
H72.15971.08333.25632.14293.21502.56664.23584.2020
H82.16413.25181.07913.33792.22142.57234.23582.7345
H93.24203.17732.18192.17341.07914.20744.20202.7345

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 112.033 N1 C2 H7 121.701
N1 C3 C5 105.915 N1 C3 H8 121.830
C2 N1 C3 106.521 C2 N1 H6 126.779
C2 N4 C5 104.324 C3 N1 H6 126.700
C3 C5 N4 111.208 C3 C5 H9 127.779
N4 C2 H7 126.266 N4 C5 H9 121.013
C5 C3 H8 132.255
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.313      
2 C 0.126      
3 C 0.014      
4 N -0.267      
5 C -0.023      
6 H 0.225      
7 H 0.084      
8 H 0.081      
9 H 0.071      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.060 3.372 0.000 3.535
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.466 -2.733 0.000
y -2.733 -24.999 0.000
z 0.000 0.000 -28.268
Traceless
 xyz
x 1.168 -2.733 0.000
y -2.733 1.868 0.000
z 0.000 0.000 -3.036
Polar
3z2-r2-6.071
x2-y2-0.467
xy-2.733
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.209 -0.287 0.000
y -0.287 4.405 0.000
z 0.000 0.000 0.728


<r2> (average value of r2) Å2
<r2> 79.551
(<r2>)1/2 8.919