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

using model chemistry: MP2=FULL/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2=FULL/6-31+G**
 hartrees
Energy at 0K-225.562689
Energy at 298.15K-225.568593
HF Energy-224.807500
Nuclear repulsion energy160.286724
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 MP2=FULL/6-31+G**
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' 3314 3113 7.22      
2 A' 3291 3091 4.42      
3 A' 3130 2940 0.90      
4 A' 1623 1525 26.95      
5 A' 1542 1448 5.85      
6 A' 1446 1358 20.54      
7 A' 1345 1264 21.41      
8 A' 1329 1248 5.60      
9 A' 1289 1210 5.61      
10 A' 1057 993 54.17      
11 A' 1016 954 8.20      
12 A' 971 912 2.25      
13 A' 880 827 7.58      
14 A' 876 823 5.55      
15 A" 3186 2992 0.10      
16 A" 1166 1095 0.39      
17 A" 1010 949 20.68      
18 A" 949 891 0.13      
19 A" 758 712 8.73      
20 A" 557 523 19.67      
21 A" 352 331 6.31      

Unscaled Zero Point Vibrational Energy (zpe) 15543.6 cm-1
Scaled (by 0.9392) Zero Point Vibrational Energy (zpe) 14598.5 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 MP2=FULL/6-31+G**
ABC
0.31884 0.29202 0.15686

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.203 0.366 0.000
C2 0.000 1.140 0.000
N3 1.125 0.499 0.000
C4 0.728 -0.906 0.000
C5 -0.765 -0.858 0.000
H6 -0.067 2.217 0.000
H7 1.134 -1.408 0.881
H8 1.134 -1.408 -0.881
H9 -1.436 -1.706 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.43022.33132.31181.29952.17233.06323.06322.0847
C21.43021.29502.17152.13961.07942.92502.92503.1876
N32.33131.29501.45942.32692.09142.10052.10053.3792
C42.31182.17151.45941.49433.22271.09231.09232.3073
C51.29952.13962.32691.49433.15392.16502.16501.0810
H62.17231.07942.09143.22273.15393.91953.91954.1554
H73.06322.92502.10051.09232.16503.91951.76162.7333
H83.06322.92502.10051.09232.16503.91951.76162.7333
H92.08473.18763.37922.30731.08104.15542.73332.7333

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 117.536 N1 C2 H6 119.243
N1 C5 C4 111.487 N1 C5 H9 121.999
C2 N1 C5 103.121 C2 N3 C4 103.907
N3 C2 H6 123.221 N3 C4 C5 103.949
N3 C4 H7 109.969 N3 C4 H8 109.969
C4 C5 H9 126.514 C5 C4 H7 112.724
C5 C4 H8 112.724 H7 C4 H8 107.485
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability