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All results from a given calculation for C3H4N2 (2H-Imidazole)

using model chemistry: QCISD/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at QCISD/6-311G**
 hartrees
Energy at 0K-225.552695
Energy at 298.15K-225.558703
HF Energy-224.775796
Nuclear repulsion energy166.331033
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 QCISD/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 A1 3259 3109 12.13      
2 A1 3106 2963 1.00      
3 A1 1741 1661 25.09      
4 A1 1462 1395 5.39      
5 A1 1415 1350 10.86      
6 A1 1269 1210 4.04      
7 A1 1042 994 1.76      
8 A1 937 894 15.70      
9 A2 1172 1119 0.00      
10 A2 902 860 0.00      
11 A2 535 510 0.00      
12 B1 3153 3009 0.30      
13 B1 1041 993 22.37      
14 B1 829 791 6.73      
15 B1 347 331 34.22      
16 B2 3244 3095 6.27      
17 B2 1793 1710 0.08      
18 B2 1428 1363 38.64      
19 B2 1260 1202 4.46      
20 B2 1099 1048 30.85      
21 B2 940 897 62.93      

Unscaled Zero Point Vibrational Energy (zpe) 15985.8 cm-1
Scaled (by 0.9541) Zero Point Vibrational Energy (zpe) 15252.1 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 QCISD/6-311G**
ABC
0.36037 0.30248 0.16984

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.208
N2 0.000 0.997 0.281
N3 0.000 -0.997 0.281
C4 0.000 0.732 -0.948
C5 0.000 -0.732 -0.948
H6 -0.899 0.000 1.832
H7 0.899 0.000 1.832
H8 0.000 1.481 -1.731
H9 0.000 -1.481 -1.731

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.36201.36202.27732.27731.09391.09393.29143.2914
N21.36201.99471.25722.12172.05152.05152.06913.1923
N31.36201.99472.12171.25722.05152.05153.19232.0691
C42.27731.25722.12171.46453.01203.01201.08342.3478
C52.27732.12171.25721.46453.01203.01202.34781.0834
H61.09392.05152.05153.01203.01201.79763.96183.9618
H71.09392.05152.05153.01203.01201.79763.96183.9618
H83.29142.06913.19231.08342.34783.96183.96182.9625
H93.29143.19232.06912.34781.08343.96183.96182.9625

picture of 2H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C4 120.747 C1 N3 C5 120.747
N2 C1 N3 94.158 N2 C1 H6 112.843
N2 C1 H7 112.843 N2 C4 C5 102.174
N2 C4 H8 124.093 N3 C1 H6 112.843
N3 C1 H7 112.843 N3 C5 C4 102.174
N3 C5 H9 124.093 C4 C5 H9 133.733
C5 C4 H8 133.733 H6 C1 H7 110.490
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability