return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: CCD/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCD/cc-pVDZ
 hartrees
Energy at 0K-225.575051
Energy at 298.15K-225.581038
HF Energy-224.833398
Nuclear repulsion energy162.436400
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 CCD/cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3718 3557 76.61      
2 A' 3317 3174 1.37      
3 A' 3289 3147 0.82      
4 A' 3285 3143 5.41      
5 A' 1599 1530 11.71      
6 A' 1552 1485 21.35      
7 A' 1501 1436 15.87      
8 A' 1401 1340 6.98      
9 A' 1294 1238 0.69      
10 A' 1189 1138 7.39      
11 A' 1161 1111 1.90      
12 A' 1112 1064 18.55      
13 A' 1091 1044 30.02      
14 A' 946 905 1.97      
15 A' 912 872 6.70      
16 A" 870 832 2.47      
17 A" 835 798 32.05      
18 A" 741 709 33.63      
19 A" 685 656 2.72      
20 A" 648 620 13.33      
21 A" 500 478 89.02      

Unscaled Zero Point Vibrational Energy (zpe) 15822.9 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 15137.8 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 CCD/cc-pVDZ
ABC
0.32379 0.30931 0.15819

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.109 0.000
C2 -1.090 0.282 0.000
C3 1.123 0.305 0.000
N4 -0.748 -0.993 0.000
C5 0.637 -0.987 0.000
H6 -0.015 2.120 0.000
H7 -2.110 0.667 0.000
H8 2.133 0.713 0.000
H9 1.210 -1.915 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.36831.38112.23152.19111.01132.15592.16913.2570
C21.36832.21281.31972.14242.12951.09073.25083.1797
C31.38112.21282.27761.38122.14253.25321.08862.2219
N42.23151.31972.27761.38483.19862.14713.34792.1639
C52.19112.14241.38121.38483.17543.20622.26451.0902
H61.01132.12952.14253.19863.17542.54962.56814.2171
H72.15591.09073.25322.14713.20622.54964.24284.2053
H82.16913.25081.08863.34792.26452.56814.24282.7850
H93.25703.17972.22192.16391.09024.21714.20532.7850

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 112.224 N1 C2 H7 122.104
N1 C3 C5 104.974 N1 C3 H8 122.427
C2 N1 C3 107.187 C2 N1 H6 126.346
C2 N4 C5 104.754 C3 N1 H6 126.467
C3 C5 N4 110.861 C3 C5 H9 127.677
N4 C2 H7 125.672 N4 C5 H9 121.462
C5 C3 H8 132.599
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability