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All results from a given calculation for C3H4N2 (4H-Imidazole)

using model chemistry: B1B95/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/6-31G*
 hartrees
Energy at 0K-226.096678
Energy at 298.15K-226.102600
HF Energy-226.096678
Nuclear repulsion energy161.410879
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 B1B95/6-31G*
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' 3260 3095 16.08      
2 A' 3240 3076 10.13      
3 A' 3081 2925 0.94      
4 A' 1704 1617 45.96      
5 A' 1605 1523 13.64      
6 A' 1428 1355 20.37      
7 A' 1347 1279 27.19      
8 A' 1327 1260 5.63      
9 A' 1280 1215 6.46      
10 A' 1066 1012 54.39      
11 A' 1030 978 17.16      
12 A' 962 913 2.67      
13 A' 889 844 3.08      
14 A' 882 837 13.68      
15 A" 3120 2962 0.97      
16 A" 1174 1114 0.24      
17 A" 1011 960 10.53      
18 A" 970 921 0.86      
19 A" 756 718 5.44      
20 A" 569 540 21.86      
21 A" 366 347 8.44      

Unscaled Zero Point Vibrational Energy (zpe) 15533.1 cm-1
Scaled (by 0.9493) Zero Point Vibrational Energy (zpe) 14745.6 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 B1B95/6-31G*
ABC
0.32461 0.29516 0.15913

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.195 0.359 0.000
C2 0.000 1.126 0.000
N3 1.115 0.499 0.000
C4 0.728 -0.894 0.000
C5 -0.763 -0.849 0.000
H6 -0.070 2.208 0.000
H7 1.136 -1.408 0.878
H8 1.136 -1.408 -0.878
H9 -1.431 -1.704 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.42002.31452.29551.28372.16373.05423.05422.0769
C21.42001.27922.14722.11751.08402.91272.91273.1715
N32.31451.27921.44612.31192.07962.10012.10013.3674
C42.29552.14721.44611.49133.20291.09641.09642.3063
C51.28372.11752.31191.49133.13452.16502.16501.0852
H62.16371.08402.07963.20293.13453.91173.91174.1418
H73.05422.91272.10011.09642.16503.91171.75682.7291
H83.05422.91272.10011.09642.16503.91171.75682.7291
H92.07693.17153.36742.30631.08524.14182.72912.7291

picture of 4H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 N3 117.981 N1 C2 H6 118.952
N1 C5 C4 111.404 N1 C5 H9 122.274
C2 N1 C5 102.993 C2 N3 C4 103.808
N3 C2 H6 123.067 N3 C4 C5 103.814
N3 C4 H7 110.632 N3 C4 H8 110.632
C4 C5 H9 126.322 C5 C4 H7 112.683
C5 C4 H8 112.683 H7 C4 H8 106.477
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.376      
2 C 0.161      
3 N -0.366      
4 C -0.266      
5 C 0.048      
6 H 0.183      
7 H 0.217      
8 H 0.217      
9 H 0.183      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.038 -2.091 0.000 2.091
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -34.486 -0.633 0.000
y -0.633 -23.590 0.000
z 0.000 0.000 -28.438
Traceless
 xyz
x -8.472 -0.633 0.000
y -0.633 7.872 0.000
z 0.000 0.000 0.600
Polar
3z2-r21.200
x2-y2-10.896
xy-0.633
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.047 -0.365 0.000
y -0.365 7.177 0.000
z 0.000 0.000 3.419


<r2> (average value of r2) Å2
<r2> 80.686
(<r2>)1/2 8.983