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

using model chemistry: MP2=FULL/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=FULL/6-311G*
 hartrees
Energy at 0K-225.665627
Energy at 298.15K-225.671528
HF Energy-224.839160
Nuclear repulsion energy160.434725
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/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' 3259 3086 11.22      
2 A' 3237 3065 6.78      
3 A' 3094 2930 0.66      
4 A' 1618 1533 21.97      
5 A' 1537 1456 3.73      
6 A' 1437 1361 24.84      
7 A' 1331 1260 21.07      
8 A' 1317 1247 6.16      
9 A' 1278 1211 7.10      
10 A' 1056 1000 52.30      
11 A' 1020 966 8.66      
12 A' 968 917 2.98      
13 A' 881 834 10.97      
14 A' 878 831 7.20      
15 A" 3145 2979 0.50      
16 A" 1175 1113 0.40      
17 A" 999 946 18.14      
18 A" 942 892 0.05      
19 A" 751 711 10.57      
20 A" 561 531 18.87      
21 A" 352 334 7.81      

Unscaled Zero Point Vibrational Energy (zpe) 15417.4 cm-1
Scaled (by 0.9471) Zero Point Vibrational Energy (zpe) 14601.9 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 MP2=FULL/6-311G*
ABC
0.32058 0.29160 0.15718

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.204 0.362 0.000
C2 0.000 1.135 0.000
N3 1.124 0.501 0.000
C4 0.730 -0.902 0.000
C5 -0.765 -0.856 0.000
H6 -0.069 2.217 0.000
H7 1.140 -1.405 0.883
H8 1.140 -1.405 -0.883
H9 -1.441 -1.707 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.42992.33132.31021.29522.17403.06553.06552.0831
C21.42991.29022.16352.13301.08472.92062.92063.1860
N32.33131.29021.45692.32592.09032.10042.10043.3838
C42.31022.16351.45691.49593.21991.09601.09602.3150
C51.29522.13302.32591.49593.15132.17082.17081.0862
H62.17401.08472.09033.21993.15133.91953.91954.1569
H73.06552.92062.10041.09602.17083.91951.76612.7446
H83.06552.92062.10041.09602.17083.91951.76612.7446
H92.08313.18603.38382.31501.08624.15692.74462.7446

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 117.886 N1 C2 H6 119.027
N1 C5 C4 111.528 N1 C5 H9 121.783
C2 N1 C5 102.908 C2 N3 C4 103.750
N3 C2 H6 123.087 N3 C4 C5 103.929
N3 C4 H7 109.912 N3 C4 H8 109.912
C4 C5 H9 126.689 C5 C4 H7 112.854
C5 C4 H8 112.854 H7 C4 H8 107.357
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability