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

using model chemistry: CCD/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCD/6-31G(2df,p)
 hartrees
Energy at 0K-225.665266
Energy at 298.15K-225.671242
HF Energy-224.819234
Nuclear repulsion energy160.794067
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 CCD/6-31G(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3275 3103 9.62      
2 A' 3255 3083 5.60      
3 A' 3109 2945 1.59      
4 A' 1709 1619 31.77      
5 A' 1632 1546 9.24      
6 A' 1454 1377 12.54      
7 A' 1357 1285 24.00      
8 A' 1341 1271 7.20      
9 A' 1300 1231 3.63      
10 A' 1061 1005 54.56      
11 A' 1028 974 8.22      
12 A' 967 916 2.20      
13 A' 894 847 5.81      
14 A' 887 840 12.31      
15 A" 3155 2988 0.95      
16 A" 1193 1130 0.47      
17 A" 1032 977 12.01      
18 A" 987 935 0.88      
19 A" 779 738 4.17      
20 A" 570 539 21.13      
21 A" 374 354 5.42      

Unscaled Zero Point Vibrational Energy (zpe) 15677.9 cm-1
Scaled (by 0.9472) Zero Point Vibrational Energy (zpe) 14850.1 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 CCD/6-31G(2df,p)
ABC
0.32165 0.29265 0.15772

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.202 0.351 0.000
C2 0.000 1.134 0.000
N3 1.114 0.510 0.000
C4 0.737 -0.899 0.000
C5 -0.764 -0.854 0.000
H6 -0.080 2.213 0.000
H7 1.145 -1.403 0.882
H8 1.145 -1.403 -0.882
H9 -1.427 -1.712 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.43482.32172.30721.28242.17433.05983.05982.0747
C21.43481.27702.16292.13031.08192.91982.91983.1833
N32.32171.27701.45892.32152.07992.10662.10663.3750
C42.30722.16291.45891.50183.21781.09431.09432.3110
C51.28242.13032.32151.50183.14292.17332.17331.0833
H62.17431.08192.07993.21783.14293.91843.91844.1493
H73.05982.91982.10661.09432.17333.91841.76322.7359
H83.05982.91982.10661.09432.17333.91841.76322.7359
H92.07473.18333.37502.31101.08334.14932.73592.7359

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 117.654 N1 C2 H6 118.856
N1 C5 C4 111.684 N1 C5 H9 122.336
C2 N1 C5 103.116 C2 N3 C4 104.278
N3 C2 H6 123.490 N3 C4 C5 103.268
N3 C4 H7 110.384 N3 C4 H8 110.384
C4 C5 H9 125.980 C5 C4 H7 112.733
C5 C4 H8 112.733 H7 C4 H8 107.346
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability