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All results from a given calculation for C3H4N2 (1H-Imidazole)

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-224.027874
Energy at 298.15K-224.033862
HF Energy-223.543128
Nuclear repulsion energy160.244899
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 MP2/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3601 3426 69.47      
2 A' 3329 3167 0.99      
3 A' 3308 3147 2.01      
4 A' 3303 3142 1.35      
5 A' 1516 1442 22.00      
6 A' 1457 1387 5.45      
7 A' 1398 1330 13.43      
8 A' 1324 1259 6.50      
9 A' 1249 1189 10.91      
10 A' 1163 1107 1.57      
11 A' 1088 1035 23.35      
12 A' 1083 1030 13.29      
13 A' 1030 980 9.47      
14 A' 954 907 2.82      
15 A' 908 864 9.58      
16 A" 848 807 6.76      
17 A" 817 777 36.67      
18 A" 733 698 34.62      
19 A" 680 647 2.58      
20 A" 656 624 37.37      
21 A" 610 581 126.50      

Unscaled Zero Point Vibrational Energy (zpe) 15527.5 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 14771.3 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 MP2/3-21G*
ABC
0.31221 0.30280 0.15372

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.126 0.000
C2 -1.116 0.291 0.000
C3 1.137 0.302 0.000
N4 -0.760 -1.008 0.000
C5 0.660 -0.997 0.000
H6 -0.000 2.139 0.000
H7 -2.126 0.668 0.000
H8 2.138 0.701 0.000
H9 1.223 -1.915 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.39391.40422.26492.22351.01312.17442.17973.2779
C21.39392.25341.34692.19452.15861.07743.28003.2157
C31.40422.25342.30541.38422.16053.28321.07752.2190
N42.26491.34692.30541.42013.23712.16183.36442.1808
C52.22352.19451.38421.42013.20503.24562.25161.0768
H61.01312.15862.16053.23713.20502.58472.57654.2348
H72.17441.07743.28322.16183.24562.58474.26374.2293
H82.17973.28001.07753.36442.25162.57654.26372.7721
H93.27793.21572.21902.18081.07684.23484.22932.7721

picture of 1H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 N4 111.448 N1 C2 H7 122.740
N1 C3 C5 105.764 N1 C3 H8 122.327
C2 N1 C3 107.291 C2 N1 H6 126.770
C2 N4 C5 104.919 C3 N1 H6 125.939
C3 C5 N4 110.578 C3 C5 H9 128.328
N4 C2 H7 125.812 N4 C5 H9 121.094
C5 C3 H8 131.909
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability