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

using model chemistry: CCSD(T)/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCSD(T)/cc-pVTZ
 hartrees
Energy at 0K-225.733590
Energy at 298.15K-225.739585
HF Energy-224.803531
Nuclear repulsion energy166.496839
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 CCSD(T)/cc-pVTZ
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 3243 3161        
2 A1 3084 3006        
3 A1 1690 1647        
4 A1 1428 1392        
5 A1 1398 1363        
6 A1 1256 1224        
7 A1 1032 1006        
8 A1 928 905        
9 A2 1157 1128        
10 A2 906 883        
11 A2 532 519        
12 B1 3129 3051        
13 B1 1015 990        
14 B1 822 801        
15 B1 352 343        
16 B2 3228 3147        
17 B2 1749 1705        
18 B2 1401 1365        
19 B2 1248 1217        
20 B2 1083 1056        
21 B2 931 907        

Unscaled Zero Point Vibrational Energy (zpe) 15805.8 cm-1
Scaled (by 0.9748) Zero Point Vibrational Energy (zpe) 15407.5 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 CCSD(T)/cc-pVTZ
ABC
0.36181 0.30274 0.17019

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.206
N2 0.000 0.997 0.282
N3 0.000 -0.997 0.282
C4 0.000 0.729 -0.949
C5 0.000 -0.729 -0.949
H6 -0.895 0.000 1.830
H7 0.895 0.000 1.830
H8 0.000 1.476 -1.728
H9 0.000 -1.476 -1.728

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.35991.35992.27522.27521.09071.09073.28483.2848
N21.35991.99431.25972.11962.04762.04762.06603.1870
N31.35991.99432.11961.25972.04762.04763.18702.0660
C42.27521.25972.11961.45713.00923.00921.07982.3385
C52.27522.11961.25971.45713.00923.00922.33851.0798
H61.09072.04762.04763.00923.00921.78953.95483.9548
H71.09072.04762.04763.00923.00921.78953.95483.9548
H83.28482.06603.18701.07982.33853.95483.95482.9528
H93.28483.18702.06602.33851.07983.95483.95482.9528

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 120.528 C1 N3 C5 120.528
N2 C1 N3 94.319 N2 C1 H6 112.885
N2 C1 H7 112.885 N2 C4 C5 102.312
N2 C4 H8 123.854 N3 C1 H6 112.885
N3 C1 H7 112.885 N3 C5 C4 102.312
N3 C5 H9 123.854 C4 C5 H9 133.834
C5 C4 H8 133.834 H6 C1 H7 110.233
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability