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

using model chemistry: QCISD(T)/6-31G*

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(T)/6-31G*
 hartrees
Energy at 0K-225.475267
Energy at 298.15K-225.481206
HF Energy-224.722197
Nuclear repulsion energy165.937597
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(T)/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 A1 3249 3117        
2 A1 3083 2957        
3 A1 1716 1646        
4 A1 1470 1410        
5 A1 1417 1359        
6 A1 1274 1222        
7 A1 1048 1005        
8 A1 939 901        
9 A2 1159 1112        
10 A2 844 809        
11 A2 520 499        
12 B1 3130 3003        
13 B1 1030 988        
14 B1 803 770        
15 B1 346 332        
16 B2 3235 3103        
17 B2 1772 1700        
18 B2 1420 1362        
19 B2 1257 1206        
20 B2 1093 1049        
21 B2 936 898        

Unscaled Zero Point Vibrational Energy (zpe) 15870.2 cm-1
Scaled (by 0.9593) Zero Point Vibrational Energy (zpe) 15224.3 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(T)/6-31G*
ABC
0.36117 0.29963 0.16913

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.212
N2 0.000 0.997 0.283
N3 0.000 -0.997 0.283
C4 0.000 0.729 -0.954
C5 0.000 -0.729 -0.954
H6 -0.900 0.000 1.841
H7 0.900 0.000 1.841
H8 0.000 1.482 -1.737
H9 0.000 -1.482 -1.737

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.36271.36272.28532.28531.09781.09783.30073.3007
N21.36271.99491.26622.12402.05672.05672.07803.1988
N31.36271.99492.12401.26622.05672.05673.19882.0780
C42.28531.26622.12401.45783.02533.02531.08682.3459
C52.28532.12401.26621.45783.02533.02532.34591.0868
H61.09782.05672.05673.02533.02531.79963.97613.9761
H71.09782.05672.05673.02533.02531.79963.97613.9761
H83.30072.07803.19881.08682.34593.97613.97612.9648
H93.30073.19882.07802.34591.08683.97613.97612.9648

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 120.706 C1 N3 C5 120.706
N2 C1 N3 94.101 N2 C1 H6 112.977
N2 C1 H7 112.977 N2 C4 C5 102.244
N2 C4 H8 123.866 N3 C1 H6 112.977
N3 C1 H7 112.977 N3 C5 C4 102.244
N3 C5 H9 123.866 C4 C5 H9 133.891
C5 C4 H8 133.891 H6 C1 H7 110.092
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability