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

using model chemistry: CCSD/6-311+G(3df,2p)

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/6-311+G(3df,2p)
 hartrees
Energy at 0K-225.690376
Energy at 298.15K-225.696414
HF Energy-224.804028
Nuclear repulsion energy166.879095
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/6-311+G(3df,2p)
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 3262 3077 9.89      
2 A1 3103 2927 0.18      
3 A1 1735 1636 25.58      
4 A1 1455 1372 3.90      
5 A1 1419 1338 19.88      
6 A1 1265 1193 2.36      
7 A1 1047 988 0.77      
8 A1 946 892 12.63      
9 A2 1179 1112 0.00      
10 A2 926 873 0.00      
11 A2 545 514 0.00      
12 B1 3149 2970 0.28      
13 B1 1035 976 22.25      
14 B1 835 787 5.93      
15 B1 360 339 34.89      
16 B2 3248 3064 2.70      
17 B2 1795 1693 0.06      
18 B2 1430 1348 35.17      
19 B2 1271 1199 3.47      
20 B2 1098 1036 36.78      
21 B2 943 889 56.54      

Unscaled Zero Point Vibrational Energy (zpe) 16022.1 cm-1
Scaled (by 0.9431) Zero Point Vibrational Energy (zpe) 15110.5 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/6-311+G(3df,2p)
ABC
0.36229 0.30491 0.17098

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/6-311+G(3df,2p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.203
N2 0.000 0.997 0.279
N3 0.000 -0.997 0.279
C4 0.000 0.728 -0.944
C5 0.000 -0.728 -0.944
H6 -0.894 0.000 1.826
H7 0.894 0.000 1.826
H8 0.000 1.471 -1.727
H9 0.000 -1.471 -1.727

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.35901.35902.26702.26701.09011.09013.27823.2782
N21.35901.99411.25282.11482.04612.04612.06143.1806
N31.35901.99412.11481.25282.04612.04613.18062.0614
C42.26701.25282.11481.45583.00083.00081.07922.3340
C52.26702.11481.25281.45583.00083.00082.33401.0792
H61.09012.04612.04613.00083.00081.78843.94813.9481
H71.09012.04612.04613.00083.00081.78843.94813.9481
H83.27822.06143.18061.07922.33403.94813.94812.9419
H93.27823.18062.06142.33401.07923.94813.94812.9419

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 120.397 C1 N3 C5 120.397
N2 C1 N3 94.392 N2 C1 H6 112.869
N2 C1 H7 112.869 N2 C4 C5 102.407
N2 C4 H8 124.078 N3 C1 H6 112.869
N3 C1 H7 112.869 N3 C5 C4 102.407
N3 C5 H9 124.078 C4 C5 H9 133.515
C5 C4 H8 133.515 H6 C1 H7 110.230
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability