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

using model chemistry: G3

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at G3
 hartrees
Energy at 0K-226.057891
Energy at 298.15K-226.053121
HF Energy-224.814429
Nuclear repulsion energy164.982114
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 HF/6-31G*
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' 3921 3695 89.55      
2 A' 3475 3274 4.27      
3 A' 3447 3247 0.97      
4 A' 3445 3245 13.47      
5 A' 1745 1644 26.70      
6 A' 1666 1569 27.01      
7 A' 1588 1496 26.42      
8 A' 1505 1418 10.55      
9 A' 1411 1330 0.57      
10 A' 1258 1185 4.93      
11 A' 1235 1163 4.35      
12 A' 1192 1123 13.43      
13 A' 1158 1091 55.93      
14 A' 1022 963 1.70      
15 A' 985 928 7.58      
16 A" 999 941 0.25      
17 A" 965 909 15.91      
18 A" 839 790 45.67      
19 A" 733 691 11.64      
20 A" 693 653 7.28      
21 A" 535 505 145.28      

Unscaled Zero Point Vibrational Energy (zpe) 16907.4 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 15930.2 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/6-31G*
ABC
0.32585 0.31157 0.15928

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.103 0.000
C2 -1.091 0.284 0.000
C3 1.119 0.306 0.000
N4 -0.740 -0.993 0.000
C5 0.635 -0.983 0.000
H6 -0.010 2.115 0.000
H7 -2.103 0.663 0.000
H8 2.118 0.714 0.000
H9 1.202 -1.904 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.36451.37422.22332.18071.01192.14902.15393.2383
C21.36452.20961.32362.14042.12671.08163.23773.1684
C31.37422.20962.26781.37632.13313.24201.07962.2107
N42.22331.32362.26781.37533.19292.14493.32942.1450
C52.18072.14041.37631.37533.16463.19502.25361.0813
H61.01192.12672.13313.19293.16462.54762.54874.1977
H72.14901.08163.24202.14493.19502.54764.22214.1848
H82.15393.23771.07963.32942.25362.54874.22212.7732
H93.23833.16842.21072.14501.08134.19774.18482.7732

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 112.207 N1 C2 H7 122.193
N1 C3 C5 105.206 N1 C3 H8 122.410
C2 N1 C3 106.794 C2 N1 H6 126.466
C2 N4 C5 105.319 C3 N1 H6 126.741
C3 C5 N4 110.474 C3 C5 H9 128.145
N4 C2 H7 125.600 N4 C5 H9 121.380
C5 C3 H8 132.383
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability