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

using model chemistry: B1B95/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/3-21G
 hartrees
Energy at 0K-224.862256
Energy at 298.15K-224.868385
HF Energy-224.862256
Nuclear repulsion energy162.343814
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 B1B95/3-21G
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' 3640 3482 64.25      
2 A' 3353 3208 0.67      
3 A' 3328 3183 0.03      
4 A' 3325 3181 3.14      
5 A' 1553 1486 21.45      
6 A' 1484 1419 7.08      
7 A' 1414 1353 12.91      
8 A' 1347 1288 10.91      
9 A' 1290 1235 0.76      
10 A' 1168 1118 0.90      
11 A' 1129 1080 16.93      
12 A' 1106 1058 15.81      
13 A' 1067 1021 26.62      
14 A' 966 924 3.46      
15 A' 921 882 10.02      
16 A" 935 895 2.32      
17 A" 871 834 23.04      
18 A" 795 761 37.02      
19 A" 691 661 0.00      
20 A" 681 651 173.60      
21 A" 655 626 18.77      

Unscaled Zero Point Vibrational Energy (zpe) 15858.6 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 15171.9 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 B1B95/3-21G
ABC
0.31988 0.31182 0.15790

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.108 0.000
C2 -1.106 0.292 0.000
C3 1.126 0.291 0.000
N4 -0.747 -0.978 0.000
C5 0.648 -0.994 0.000
H6 0.000 2.117 0.000
H7 -2.112 0.670 0.000
H8 2.125 0.683 0.000
H9 1.204 -1.912 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.37481.39172.21532.20011.00832.15702.16693.2518
C21.37482.23231.31922.17492.13401.07503.25443.1931
C31.39172.23232.26181.37122.14513.26051.07272.2043
N42.21531.31922.26181.39453.18292.14023.31682.1634
C52.20012.17491.37121.39453.17753.22322.23471.0735
H61.00832.13402.14513.18293.17752.56002.56304.2049
H72.15701.07503.26052.14023.22322.56004.23694.2036
H82.16693.25441.07273.31682.23472.56304.23692.7534
H93.25183.19312.20432.16341.07354.20494.20362.7534

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 110.623 N1 C2 H7 122.933
N1 C3 C5 105.555 N1 C3 H8 122.587
C2 N1 C3 107.589 C2 N1 H6 126.455
C2 N4 C5 106.503 C3 N1 H6 125.956
C3 C5 N4 109.730 C3 C5 H9 128.348
N4 C2 H7 126.444 N4 C5 H9 121.922
C5 C3 H8 131.857
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.739      
2 C 0.273      
3 C 0.022      
4 N -0.515      
5 C -0.093      
6 H 0.347      
7 H 0.246      
8 H 0.236      
9 H 0.222      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.219 3.697 0.000 3.893
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.836 -3.370 0.000
y -3.370 -25.078 0.000
z 0.000 0.000 -31.780
Traceless
 xyz
x 2.593 -3.370 0.000
y -3.370 3.730 0.000
z 0.000 0.000 -6.323
Polar
3z2-r2-12.646
x2-y2-0.758
xy-3.370
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.509 -0.269 0.000
y -0.269 6.218 0.000
z 0.000 0.000 1.909


<r2> (average value of r2) Å2
<r2> 80.261
(<r2>)1/2 8.959