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

using model chemistry: CCD/3-21G*

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/3-21G*
 hartrees
Energy at 0K-223.930561
Energy at 298.15K-223.936579
HF Energy-223.434647
Nuclear repulsion energy164.833494
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/3-21G*
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 3253 3111 8.03      
2 A1 3089 2955 0.19      
3 A1 1681 1608 29.28      
4 A1 1503 1437 7.08      
5 A1 1373 1313 0.77      
6 A1 1241 1187 4.38      
7 A1 1019 974 18.13      
8 A1 900 861 5.92      
9 A2 1195 1143 0.00      
10 A2 885 847 0.00      
11 A2 566 541 0.00      
12 B1 3134 2998 0.22      
13 B1 1046 1001 19.34      
14 B1 830 794 12.44      
15 B1 367 351 42.20      
16 B2 3236 3096 11.63      
17 B2 1722 1648 0.58      
18 B2 1360 1301 10.33      
19 B2 1284 1229 3.65      
20 B2 1070 1023 28.18      
21 B2 985 943 76.26      

Unscaled Zero Point Vibrational Energy (zpe) 15870.2 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 15179.9 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/3-21G*
ABC
0.35638 0.29464 0.16654

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.230
N2 0.000 0.999 0.282
N3 0.000 -0.999 0.282
C4 0.000 0.745 -0.960
C5 0.000 -0.745 -0.960
H6 -0.904 0.000 1.848
H7 0.904 0.000 1.848
H8 0.000 1.481 -1.752
H9 0.000 -1.481 -1.752

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.37731.37732.31322.31321.09501.09503.32933.3293
N21.37731.99731.26742.14022.06612.06612.08983.2067
N31.37731.99732.14021.26742.06612.06613.20672.0898
C42.31321.26742.14021.48903.04263.04261.08132.3621
C52.31322.14021.26741.48903.04263.04262.36211.0813
H61.09502.06612.06613.04263.04261.80753.99633.9963
H71.09502.06612.06613.04263.04261.80753.99633.9963
H83.32932.08983.20671.08132.36213.99633.99632.9619
H93.32933.20672.08982.36211.08133.99633.99632.9619

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 121.955 C1 N3 C5 121.955
N2 C1 N3 92.952 N2 C1 H6 112.880
N2 C1 H7 112.880 N2 C4 C5 101.568
N2 C4 H8 125.503 N3 C1 H6 112.880
N3 C1 H7 112.880 N3 C5 C4 101.568
N3 C5 H9 125.503 C4 C5 H9 132.929
C5 C4 H8 132.929 H6 C1 H7 111.255
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability