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

using model chemistry: CISD/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CISD/6-311G*
 hartrees
Energy at 0K-225.475107
Energy at 298.15K-225.481160
HF Energy-224.842303
Nuclear repulsion energy161.622918
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 CISD/6-311G*
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' 3330 3081 14.93      
2 A' 3305 3058 11.02      
3 A' 3160 2924 4.06      
4 A' 1773 1641 50.58      
5 A' 1683 1557 17.61      
6 A' 1503 1391 15.83      
7 A' 1395 1291 26.33      
8 A' 1385 1281 15.14      
9 A' 1340 1240 4.46      
10 A' 1094 1012 64.23      
11 A' 1065 986 16.15      
12 A' 990 916 2.10      
13 A' 925 856 3.55      
14 A' 914 846 13.67      
15 A" 3202 2963 4.49      
16 A" 1234 1142 0.39      
17 A" 1070 990 16.05      
18 A" 1019 943 0.25      
19 A" 801 741 5.51      
20 A" 586 542 26.55      
21 A" 380 352 5.80      

Unscaled Zero Point Vibrational Energy (zpe) 16076.8 cm-1
Scaled (by 0.9253) Zero Point Vibrational Energy (zpe) 14875.8 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 CISD/6-311G*
ABC
0.32481 0.29577 0.15936

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.194 0.348 0.000
C2 0.000 1.129 0.000
N3 1.106 0.508 0.000
C4 0.736 -0.895 0.000
C5 -0.762 -0.850 0.000
H6 -0.079 2.205 0.000
H7 1.140 -1.397 0.879
H8 1.140 -1.397 -0.879
H9 -1.426 -1.703 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.42692.30602.29541.27392.16603.04423.04422.0636
C21.42691.26842.15292.12051.07892.90712.90713.1702
N32.30601.26841.45052.30932.06972.09802.09803.3612
C42.29542.15291.45051.49803.20451.09011.09012.3078
C51.27392.12052.30931.49803.13032.16532.16531.0807
H62.16601.07892.06973.20453.13033.90263.90264.1330
H73.04422.90712.09801.09012.16533.90261.75772.7298
H83.04422.90712.09801.09012.16533.90261.75772.7298
H92.06363.17023.36122.30781.08074.13302.72982.7298

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 117.522 N1 C2 H6 118.972
N1 C5 C4 111.550 N1 C5 H9 122.211
C2 N1 C5 103.317 C2 N3 C4 104.511
N3 C2 H6 123.506 N3 C4 C5 103.101
N3 C4 H7 110.530 N3 C4 H8 110.530
C4 C5 H9 126.239 C5 C4 H7 112.621
C5 C4 H8 112.621 H7 C4 H8 107.449
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability