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

using model chemistry: MP2=FULL/cc-pVTZ

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=FULL/cc-pVTZ
 hartrees
Energy at 0K-225.818636
Energy at 298.15K-225.824585
HF Energy-224.873432
Nuclear repulsion energy161.394128
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=FULL/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 A' 3276 3110 7.96      
2 A' 3257 3092 5.07      
3 A' 3104 2947 0.97      
4 A' 1622 1540 25.17      
5 A' 1536 1458 4.55      
6 A' 1413 1341 22.46      
7 A' 1338 1270 23.45      
8 A' 1320 1253 5.18      
9 A' 1268 1204 6.77      
10 A' 1061 1007 49.91      
11 A' 1019 967 10.73      
12 A' 969 920 2.55      
13 A' 884 839 12.22      
14 A' 882 837 6.13      
15 A" 3140 2981 0.01      
16 A" 1172 1113 0.41      
17 A" 1013 961 16.25      
18 A" 976 927 1.88      
19 A" 761 723 5.11      
20 A" 568 540 18.90      
21 A" 362 344 6.41      

Unscaled Zero Point Vibrational Energy (zpe) 15469.2 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 14686.4 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=FULL/cc-pVTZ
ABC
0.32345 0.29597 0.15906

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.195 0.362 0.000
C2 0.000 1.131 0.000
N3 1.117 0.497 0.000
C4 0.724 -0.898 0.000
C5 -0.760 -0.852 0.000
H6 -0.067 2.204 0.000
H7 1.126 -1.403 0.876
H8 1.126 -1.403 -0.876
H9 -1.425 -1.698 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.42112.31542.29491.28902.16013.04413.04412.0724
C21.42111.28442.15422.12371.07492.90802.90803.1677
N32.31541.28441.44892.31112.07752.09192.09193.3581
C42.29492.15421.44891.48453.20101.08841.08842.2928
C51.28902.12372.31111.48453.13342.15142.15141.0761
H62.16011.07492.07753.20103.13343.89863.89864.1314
H73.04412.90802.09191.08842.15143.89861.75272.7134
H83.04412.90802.09191.08842.15143.89861.75272.7134
H92.07243.16773.35812.29281.07614.13142.71342.7134

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 117.611 N1 C2 H6 119.212
N1 C5 C4 111.481 N1 C5 H9 122.133
C2 N1 C5 103.081 C2 N3 C4 103.864
N3 C2 H6 123.177 N3 C4 C5 103.962
N3 C4 H7 110.258 N3 C4 H8 110.258
C4 C5 H9 126.385 C5 C4 H7 112.566
C5 C4 H8 112.566 H7 C4 H8 107.249
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability