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

using model chemistry: QCISD(T)/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD(T)/6-31G*
 hartrees
Energy at 0K-225.571979
Energy at 298.15K-225.577817
HF Energy-224.810451
Nuclear repulsion energy162.360613
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 QCISD(T)/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' 3650 3501        
2 A' 3287 3154        
3 A' 3263 3130        
4 A' 3258 3126        
5 A' 1577 1513        
6 A' 1531 1468        
7 A' 1471 1411        
8 A' 1384 1327        
9 A' 1294 1242        
10 A' 1168 1121        
11 A' 1162 1115        
12 A' 1115 1070        
13 A' 1089 1045        
14 A' 939 901        
15 A' 902 866        
16 A" 809 776        
17 A" 785 753        
18 A" 688 660        
19 A" 669 642        
20 A" 623 598        
21 A" 465 446        

Unscaled Zero Point Vibrational Energy (zpe) 15564.7 cm-1
Scaled (by 0.9593) Zero Point Vibrational Energy (zpe) 14931.2 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 QCISD(T)/6-31G*
ABC
0.32282 0.30954 0.15802

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.110 0.000
C2 -1.093 0.283 0.000
C3 1.125 0.302 0.000
N4 -0.749 -0.994 0.000
C5 0.639 -0.985 0.000
H6 -0.011 2.123 0.000
H7 -2.109 0.664 0.000
H8 2.129 0.710 0.000
H9 1.204 -1.911 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.37041.38492.23262.19011.01302.15562.16583.2522
C21.37042.21821.32232.14692.13401.08533.24983.1768
C31.38492.21822.27821.37572.14613.25441.08322.2149
N42.23261.32232.27821.38823.20232.14473.34382.1577
C52.19012.14691.37571.38823.17503.20552.25621.0849
H61.01302.13402.14613.20233.17502.55472.56424.2131
H72.15561.08533.25442.14473.20552.55474.23794.1967
H82.16583.24981.08323.34382.25622.56424.23792.7795
H93.25223.17682.21492.15771.08494.21314.19672.7795

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 112.009 N1 C2 H7 122.324
N1 C3 C5 104.999 N1 C3 H8 122.217
C2 N1 C3 107.230 C2 N1 H6 126.455
C2 N4 C5 104.737 C3 N1 H6 126.315
C3 C5 N4 111.026 C3 C5 H9 127.963
N4 C2 H7 125.668 N4 C5 H9 121.011
C5 C3 H8 132.784
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability