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

using model chemistry: QCISD(T)=FULL/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)=FULL/6-31G*
 hartrees
Energy at 0K-225.497062
Energy at 298.15K-225.503011
HF Energy-224.722511
Nuclear repulsion energy166.057315
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)=FULL/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 3251 3251        
2 A1 3083 3083        
3 A1 1719 1719        
4 A1 1470 1470        
5 A1 1418 1418        
6 A1 1275 1275        
7 A1 1049 1049        
8 A1 941 941        
9 A2 1162 1162        
10 A2 851 851        
11 A2 523 523        
12 B1 3131 3131        
13 B1 1031 1031        
14 B1 807 807        
15 B1 349 349        
16 B2 3236 3236        
17 B2 1776 1776        
18 B2 1421 1421        
19 B2 1259 1259        
20 B2 1095 1095        
21 B2 938 938        

Unscaled Zero Point Vibrational Energy (zpe) 15892.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 15892.2 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)=FULL/6-31G*
ABC
0.36149 0.30023 0.16939

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.210
N2 0.000 0.997 0.283
N3 0.000 -0.997 0.283
C4 0.000 0.728 -0.953
C5 0.000 -0.728 -0.953
H6 -0.899 0.000 1.839
H7 0.899 0.000 1.839
H8 0.000 1.481 -1.736
H9 0.000 -1.481 -1.736

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.36181.36182.28262.28261.09751.09753.29803.2980
N21.36181.99471.26512.12262.05562.05562.07663.1970
N31.36181.99472.12261.26512.05562.05563.19702.0766
C42.28261.26512.12261.45633.02263.02261.08652.3439
C52.28262.12261.26511.45633.02263.02262.34391.0865
H61.09752.05562.05563.02263.02261.79893.97343.9734
H71.09752.05562.05563.02263.02261.79893.97343.9734
H83.29802.07663.19701.08652.34393.97343.97342.9620
H93.29803.19702.07662.34391.08653.97343.97342.9620

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 120.628 C1 N3 C5 120.628
N2 C1 N3 94.172 N2 C1 H6 112.965
N2 C1 H7 112.965 N2 C4 C5 102.287
N2 C4 H8 123.850 N3 C1 H6 112.965
N3 C1 H7 112.965 N3 C5 C4 102.287
N3 C5 H9 123.850 C4 C5 H9 133.863
C5 C4 H8 133.863 H6 C1 H7 110.078
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability