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: CID/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 CID/6-31G*
 hartrees
Energy at 0K-225.424220
Energy at 298.15K-225.430304
HF Energy-224.813922
Nuclear repulsion energy164.190495
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 CID/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' 3809 3518 82.46      
2 A' 3411 3151 1.84      
3 A' 3383 3124 0.43      
4 A' 3380 3122 7.45      
5 A' 1676 1548 17.22      
6 A' 1613 1490 23.68      
7 A' 1544 1426 23.82      
8 A' 1465 1353 10.24      
9 A' 1360 1256 0.66      
10 A' 1228 1134 7.42      
11 A' 1219 1126 0.99      
12 A' 1167 1078 15.59      
13 A' 1139 1052 44.06      
14 A' 986 911 1.90      
15 A' 948 876 7.23      
16 A" 909 839 1.92      
17 A" 880 813 28.79      
18 A" 775 716 38.36      
19 A" 709 655 6.45      
20 A" 668 617 15.58      
21 A" 531 490 122.70      

Unscaled Zero Point Vibrational Energy (zpe) 16399.0 cm-1
Scaled (by 0.9237) Zero Point Vibrational Energy (zpe) 15147.7 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 CID/6-31G*
ABC
0.32898 0.31772 0.16163

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.098 0.000
C2 -1.081 0.281 0.000
C3 1.113 0.295 0.000
N4 -0.741 -0.977 0.000
C5 0.633 -0.977 0.000
H6 -0.012 2.100 0.000
H7 -2.089 0.659 0.000
H8 2.110 0.694 0.000
H9 1.191 -1.896 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.35511.37242.20302.16931.00212.13442.14803.2221
C21.35512.19391.30282.12582.11021.07613.21723.1466
C31.37242.19392.24781.35922.12683.22211.07362.1921
N42.20301.30282.24781.37363.16192.11913.30372.1395
C52.16932.12581.35921.37363.14373.17512.22961.0753
H61.00212.11022.12683.16193.14372.52822.54524.1730
H72.13441.07613.22212.11913.17512.52824.19844.1572
H82.14803.21721.07363.30372.22962.54524.19842.7475
H93.22213.14662.19212.13951.07534.17304.15722.7475

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 111.949 N1 C2 H7 122.369
N1 C3 C5 105.143 N1 C3 H8 122.373
C2 N1 C3 107.092 C2 N1 H6 126.417
C2 N4 C5 105.146 C3 N1 H6 126.491
C3 C5 N4 110.670 C3 C5 H9 128.042
N4 C2 H7 125.682 N4 C5 H9 121.288
C5 C3 H8 132.484
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability