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All results from a given calculation for C3H4N2 (4H-Imidazole)

using model chemistry: MP2/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/TZVP
 hartrees
Energy at 0K-225.618142
Energy at 298.15K-225.624018
HF Energy-224.862256
Nuclear repulsion energy160.574143
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 MP2/TZVP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3274 3103 8.64      
2 A' 3251 3082 5.54      
3 A' 3102 2941 0.91      
4 A' 1613 1529 23.16      
5 A' 1529 1449 4.38      
6 A' 1422 1347 19.75      
7 A' 1343 1273 18.06      
8 A' 1324 1255 7.00      
9 A' 1285 1218 9.01      
10 A' 1047 993 54.35      
11 A' 1007 954 5.90      
12 A' 961 911 2.36      
13 A' 882 836 8.54      
14 A' 878 832 5.34      
15 A" 3154 2990 0.34      
16 A" 1152 1092 0.37      
17 A" 1002 950 17.77      
18 A" 929 881 0.06      
19 A" 743 705 7.73      
20 A" 552 523 18.70      
21 A" 334 317 6.04      

Unscaled Zero Point Vibrational Energy (zpe) 15392.3 cm-1
Scaled (by 0.9479) Zero Point Vibrational Energy (zpe) 14590.4 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 MP2/TZVP
ABC
0.32059 0.29241 0.15742

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.202 0.359 0.000
C2 0.000 1.136 0.000
N3 1.122 0.504 0.000
C4 0.730 -0.902 0.000
C5 -0.764 -0.857 0.000
H6 -0.073 2.214 0.000
H7 1.134 -1.403 0.884
H8 1.134 -1.403 -0.884
H9 -1.431 -1.709 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.43092.32822.30701.29292.17123.05613.05612.0811
C21.43091.28782.16452.13431.08072.91722.91723.1847
N32.32821.28781.45922.32532.08662.10132.10133.3786
C42.30702.16451.45921.49433.21781.09291.09292.3070
C51.29292.13432.32531.49433.14782.16292.16291.0824
H62.17121.08072.08663.21783.14783.91393.91394.1516
H73.05612.91722.10131.09292.16293.91391.76712.7299
H83.05612.91722.10131.09292.16293.91391.76712.7299
H92.08113.18473.37862.30701.08244.15162.72992.7299

picture of 4H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 N3 117.731 N1 C2 H6 118.982
N1 C5 C4 111.526 N1 C5 H9 122.114
C2 N1 C5 103.059 C2 N3 C4 103.819
N3 C2 H6 123.286 N3 C4 C5 103.864
N3 C4 H7 110.014 N3 C4 H8 110.014
C4 C5 H9 126.360 C5 C4 H7 112.513
C5 C4 H8 112.513 H7 C4 H8 107.886
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability