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

using model chemistry: CCD/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCD/6-31G(2df,p)
 hartrees
Energy at 0K-225.592067
Energy at 298.15K-225.598116
HF Energy-224.748319
Nuclear repulsion energy166.853576
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 CCD/6-31G(2df,p)
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 3293 3119 8.45      
2 A1 3130 2965 0.14      
3 A1 1762 1669 24.13      
4 A1 1461 1384 4.10      
5 A1 1424 1349 13.68      
6 A1 1275 1208 2.93      
7 A1 1057 1001 1.31      
8 A1 954 903 14.38      
9 A2 1182 1120 0.00      
10 A2 937 888 0.00      
11 A2 549 520 0.00      
12 B1 3179 3011 0.03      
13 B1 1042 987 19.74      
14 B1 844 799 3.81      
15 B1 360 341 35.64      
16 B2 3278 3105 4.43      
17 B2 1824 1727 0.30      
18 B2 1437 1361 30.10      
19 B2 1275 1208 2.13      
20 B2 1104 1046 30.57      
21 B2 951 901 65.63      

Unscaled Zero Point Vibrational Energy (zpe) 16158.3 cm-1
Scaled (by 0.9472) Zero Point Vibrational Energy (zpe) 15305.2 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 CCD/6-31G(2df,p)
ABC
0.36205 0.30489 0.17092

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31G(2df,p)

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 0.729 -0.944
C5 0.000 -0.729 -0.944
H6 -0.894 0.000 1.828
H7 0.894 0.000 1.828
H8 0.000 1.471 -1.728
H9 0.000 -1.471 -1.728

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.35901.35902.26692.26691.09151.09153.27923.2792
N21.35901.99411.25222.11532.04782.04782.06243.1814
N31.35901.99412.11531.25222.04782.04783.18142.0624
C42.26691.25222.11531.45743.00263.00261.07982.3355
C52.26692.11531.25221.45743.00263.00262.33551.0798
H61.09152.04782.04783.00263.00261.78883.95113.9511
H71.09152.04782.04783.00263.00261.78883.95113.9511
H83.27922.06243.18141.07982.33553.95113.95112.9424
H93.27923.18142.06242.33551.07983.95113.95112.9424

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 120.430 C1 N3 C5 120.430
N2 C1 N3 94.390 N2 C1 H6 112.921
N2 C1 H7 112.921 N2 C4 C5 102.375
N2 C4 H8 124.183 N3 C1 H6 112.921
N3 C1 H7 112.921 N3 C5 C4 102.375
N3 C5 H9 124.183 C4 C5 H9 133.442
C5 C4 H8 133.442 H6 C1 H7 110.060
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability