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

using model chemistry: MP2/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-311G**
 hartrees
Energy at 0K-225.600884
Energy at 298.15K-225.606778
HF Energy-224.845479
Nuclear repulsion energy160.263417
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 MP2/6-311G**
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' 3254 3092 10.67      
2 A' 3233 3072 6.32      
3 A' 3090 2937 0.80      
4 A' 1613 1533 21.97      
5 A' 1531 1455 3.75      
6 A' 1419 1348 20.17      
7 A' 1326 1260 19.55      
8 A' 1308 1243 5.84      
9 A' 1267 1204 6.75      
10 A' 1050 998 50.37      
11 A' 1015 965 7.84      
12 A' 960 912 2.38      
13 A' 876 832 12.11      
14 A' 872 829 5.02      
15 A" 3142 2985 0.71      
16 A" 1161 1103 0.51      
17 A" 998 948 17.64      
18 A" 945 898 0.34      
19 A" 749 712 7.48      
20 A" 556 529 18.43      
21 A" 346 329 6.64      

Unscaled Zero Point Vibrational Energy (zpe) 15355.7 cm-1
Scaled (by 0.9502) Zero Point Vibrational Energy (zpe) 14591.0 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 MP2/6-311G**
ABC
0.32010 0.29070 0.15683

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.206 0.362 0.000
C2 0.000 1.135 0.000
N3 1.126 0.503 0.000
C4 0.732 -0.902 0.000
C5 -0.766 -0.857 0.000
H6 -0.071 2.217 0.000
H7 1.137 -1.406 0.885
H8 1.137 -1.406 -0.885
H9 -1.438 -1.711 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.43232.33552.31361.29572.17473.06603.06602.0855
C21.43231.29122.16512.13451.08462.92182.92183.1884
N32.33551.29121.45912.32972.09132.10432.10433.3866
C42.31362.16511.45911.49883.22161.09651.09652.3153
C51.29572.13452.32971.49883.15192.17022.17021.0861
H62.17471.08462.09133.22163.15193.92133.92134.1588
H73.06602.92182.10431.09652.17023.92131.77092.7402
H83.06602.92182.10431.09652.17023.92131.77092.7402
H92.08553.18843.38662.31531.08614.15882.74022.7402

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 117.990 N1 C2 H6 118.898
N1 C5 C4 111.559 N1 C5 H9 121.981
C2 N1 C5 102.850 C2 N3 C4 103.682
N3 C2 H6 123.112 N3 C4 C5 103.919
N3 C4 H7 110.040 N3 C4 H8 110.040
C4 C5 H9 126.460 C5 C4 H7 112.555
C5 C4 H8 112.555 H7 C4 H8 107.709
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability