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

using model chemistry: CCD/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 CCD/6-31G**
 hartrees
Energy at 0K-225.547116
Energy at 298.15K-225.553085
HF Energy-224.802333
Nuclear repulsion energy160.463682
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**
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' 3306 3100 13.96      
2 A' 3285 3080 9.39      
3 A' 3132 2936 3.02      
4 A' 1721 1613 27.67      
5 A' 1645 1542 7.67      
6 A' 1486 1393 10.75      
7 A' 1372 1286 21.46      
8 A' 1358 1273 6.58      
9 A' 1319 1236 3.39      
10 A' 1061 995 54.53      
11 A' 1030 966 5.08      
12 A' 977 916 1.54      
13 A' 895 839 7.73      
14 A' 887 832 8.52      
15 A" 3180 2982 3.44      
16 A" 1198 1123 0.33      
17 A" 1035 970 14.41      
18 A" 970 910 0.13      
19 A" 783 734 5.07      
20 A" 567 532 22.06      
21 A" 371 348 5.72      

Unscaled Zero Point Vibrational Energy (zpe) 15787.1 cm-1
Scaled (by 0.9376) Zero Point Vibrational Energy (zpe) 14802.0 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**
ABC
0.32015 0.29159 0.15705

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.205 0.353 0.000
C2 0.000 1.138 0.000
N3 1.118 0.509 0.000
C4 0.737 -0.902 0.000
C5 -0.765 -0.857 0.000
H6 -0.076 2.215 0.000
H7 1.144 -1.404 0.881
H8 1.144 -1.404 -0.881
H9 -1.426 -1.713 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.43842.32832.31241.28722.17823.06303.06302.0779
C21.43841.28262.16912.13621.08032.92342.92343.1876
N32.32831.28261.46162.32582.08272.10612.10613.3771
C42.31242.16911.46161.50243.22191.09251.09252.3092
C51.28722.13622.32581.50243.14842.17252.17251.0816
H62.17821.08032.08273.22193.14843.91983.91984.1540
H73.06302.92342.10611.09252.17253.91981.76182.7337
H83.06302.92342.10611.09252.17253.91981.76182.7337
H92.07793.18763.37712.30921.08164.15402.73372.7337

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 117.555 N1 C2 H6 119.043
N1 C5 C4 111.745 N1 C5 H9 122.371
C2 N1 C5 103.070 C2 N3 C4 104.259
N3 C2 H6 123.402 N3 C4 C5 103.370
N3 C4 H7 110.257 N3 C4 H8 110.257
C4 C5 H9 125.884 C5 C4 H7 112.737
C5 C4 H8 112.737 H7 C4 H8 107.475
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability