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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-226.102062
Energy at 298.15K-226.107988
HF Energy-226.102062
Nuclear repulsion energy161.454529
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' 3250 3103 14.58      
2 A' 3232 3086 9.36      
3 A' 3074 2935 0.91      
4 A' 1701 1624 45.47      
5 A' 1602 1530 13.56      
6 A' 1407 1343 20.55      
7 A' 1343 1283 27.70      
8 A' 1322 1262 5.40      
9 A' 1271 1214 6.64      
10 A' 1067 1019 52.75      
11 A' 1029 982 18.30      
12 A' 960 916 2.61      
13 A' 889 849 3.29      
14 A' 882 842 13.85      
15 A" 3114 2973 0.75      
16 A" 1165 1112 0.22      
17 A" 1009 963 10.54      
18 A" 971 927 1.28      
19 A" 753 719 4.98      
20 A" 569 543 22.09      
21 A" 364 347 8.52      

Unscaled Zero Point Vibrational Energy (zpe) 15485.6 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 14785.7 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
0.32458 0.29553 0.15922

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 -1.194 0.360 0.000
C2 0.000 1.127 0.000
N3 1.115 0.499 0.000
C4 0.727 -0.894 0.000
C5 -0.762 -0.849 0.000
H6 -0.069 2.208 0.000
H7 1.133 -1.410 0.877
H8 1.133 -1.410 -0.877
H9 -1.430 -1.704 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.41922.31352.29421.28392.16363.05293.05292.0770
C21.41921.27952.14712.11751.08352.91342.91343.1710
N32.31351.27951.44552.31102.07912.10082.10083.3659
C42.29422.14711.44551.49013.20211.09591.09592.3045
C51.28392.11752.31101.49013.13452.16282.16281.0847
H62.16361.08352.07913.20213.13453.91213.91214.1416
H73.05292.91342.10081.09592.16283.91211.75432.7255
H83.05292.91342.10081.09592.16283.91211.75432.7255
H92.07703.17103.36592.30451.08474.14162.72552.7255

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 117.927 N1 C2 H6 119.044
N1 C5 C4 111.381 N1 C5 H9 122.317
C2 N1 C5 103.031 C2 N3 C4 103.813
N3 C2 H6 123.029 N3 C4 C5 103.848
N3 C4 H7 110.757 N3 C4 H8 110.757
C4 C5 H9 126.302 C5 C4 H7 112.622
C5 C4 H8 112.622 H7 C4 H8 106.332
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 -0.392      
2 C 0.219      
3 N -0.387      
4 C -0.167      
5 C 0.091      
6 H 0.141      
7 H 0.177      
8 H 0.177      
9 H 0.140      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.048 -2.096 0.000 2.096
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -34.475 -0.643 0.000
y -0.643 -23.567 0.000
z 0.000 0.000 -28.426
Traceless
 xyz
x -8.478 -0.643 0.000
y -0.643 7.883 0.000
z 0.000 0.000 0.595
Polar
3z2-r21.190
x2-y2-10.908
xy-0.643
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.080 -0.363 0.000
y -0.363 7.232 0.000
z 0.000 0.000 3.456


<r2> (average value of r2) Å2
<r2> 80.640
(<r2>)1/2 8.980