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

using model chemistry: QCISD(T)/TZVP

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)/TZVP
 hartrees
Energy at 0K-225.701616
Energy at 298.15K-225.707012
HF Energy-224.883743
Nuclear repulsion energy162.726402
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)/TZVP
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' 3676 3541        
2 A' 3299 3178        
3 A' 3273 3152        
4 A' 3271 3150        
5 A' 1558 1501        
6 A' 1510 1455        
7 A' 1447 1394        
8 A' 1364 1314        
9 A' 1291 1243        
10 A' 1155 1113        
11 A' 1144 1102        
12 A' 1100 1060        
13 A' 1078 1038        
14 A' 938 903        
15 A' 904 871        
16 A" 747 719        
17 A" 712 686        
18 A" 655 631        
19 A" 625 602        
20 A" 539 519        
21 A" 184 177        

Unscaled Zero Point Vibrational Energy (zpe) 15234.2 cm-1
Scaled (by 0.9632) Zero Point Vibrational Energy (zpe) 14673.5 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)/TZVP
ABC
0.32398 0.31102 0.15868

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.109 0.000
C2 -1.091 0.282 0.000
C3 1.123 0.300 0.000
N4 -0.748 -0.990 0.000
C5 0.639 -0.984 0.000
H6 -0.012 2.117 0.000
H7 -2.101 0.662 0.000
H8 2.121 0.705 0.000
H9 1.200 -1.905 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.36901.38362.22842.18861.00752.14802.15973.2446
C21.36902.21351.31752.14372.12841.07953.24003.1676
C31.38362.21352.27221.37252.14133.24391.07762.2069
N42.22841.31752.27221.38663.19262.13603.33212.1522
C52.18862.14371.37251.38663.16823.19672.24711.0787
H61.00752.12842.14133.19263.16822.54552.55824.2005
H72.14801.07953.24392.13603.19672.54554.22274.1824
H82.15973.24001.07763.33212.24712.55824.22272.7675
H93.24463.16762.20692.15221.07874.20054.18242.7675

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 112.071 N1 C2 H7 122.192
N1 C3 C5 105.141 N1 C3 H8 122.199
C2 N1 C3 107.055 C2 N1 H6 126.502
C2 N4 C5 104.856 C3 N1 H6 126.442
C3 C5 N4 110.876 C3 C5 H9 128.004
N4 C2 H7 125.737 N4 C5 H9 121.120
C5 C3 H8 132.660
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability