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

using model chemistry: MP2=FULL/STO-3G

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/STO-3G
 hartrees
Energy at 0K-222.286683
Energy at 298.15K-222.292322
HF Energy-221.979016
Nuclear repulsion energy158.533302
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/STO-3G
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' 3859 3431 63.66      
2 A' 3586 3188 7.00      
3 A' 3559 3163 8.25      
4 A' 3558 3162 8.85      
5 A' 1634 1452 11.97      
6 A' 1599 1422 9.73      
7 A' 1577 1402 20.03      
8 A' 1420 1262 13.97      
9 A' 1294 1150 1.56      
10 A' 1201 1068 2.76      
11 A' 1184 1053 14.76      
12 A' 1149 1022 4.67      
13 A' 1106 983 3.22      
14 A' 959 852 1.00      
15 A' 922 819 2.77      
16 A" 918 816 0.58      
17 A" 825 733 12.71      
18 A" 794 706 7.68      
19 A" 670 596 3.12      
20 A" 659 586 9.59      
21 A" 436 388 78.39      

Unscaled Zero Point Vibrational Energy (zpe) 16454.3 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 14626.2 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/STO-3G
ABC
0.30993 0.29289 0.15059

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.137 0.000
C2 -1.119 0.286 0.000
C3 1.145 0.312 0.000
N4 -0.774 -1.041 0.000
C5 0.666 -0.991 0.000
H6 -0.009 2.179 0.000
H7 -2.142 0.686 0.000
H8 2.156 0.733 0.000
H9 1.257 -1.914 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.40531.41082.31072.22931.04252.18852.19313.2995
C21.40532.26321.37062.19422.19471.09863.30463.2378
C31.41082.26322.34701.38762.19473.30741.09552.2285
N42.31071.37062.34701.44053.30942.20293.42452.2108
C52.22932.19421.38761.44053.24093.27022.27841.0962
H61.04252.19472.19473.30943.24092.60372.60284.2843
H72.18851.09863.30742.20293.27022.60374.29764.2793
H82.19313.30461.09553.42452.27842.60284.29762.7953
H93.29953.23782.22852.21081.09624.28434.27932.7953

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 112.684 N1 C2 H7 121.381
N1 C3 C5 105.612 N1 C3 H8 121.593
C2 N1 C3 106.959 C2 N1 H6 126.789
C2 N4 C5 102.591 C3 N1 H6 126.252
C3 C5 N4 112.154 C3 C5 H9 127.183
N4 C2 H7 125.935 N4 C5 H9 120.663
C5 C3 H8 132.795
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability