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All results from a given calculation for C3H4N2 (4H-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-225.403401
Energy at 298.15K-225.409455
HF Energy-224.797188
Nuclear repulsion energy161.519775
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
(Å4/u)
Dep P Dep U
1 A' 3357 3100 13.94      
2 A' 3333 3078 8.58      
3 A' 3176 2934 2.27      
4 A' 1792 1656 47.33      
5 A' 1704 1574 17.91      
6 A' 1520 1404 12.97      
7 A' 1409 1302 29.06      
8 A' 1396 1289 10.45      
9 A' 1354 1250 3.91      
10 A' 1103 1019 63.88      
11 A' 1068 986 13.09      
12 A' 1001 925 1.67      
13 A' 927 856 3.85      
14 A' 916 846 13.91      
15 A" 3220 2974 2.88      
16 A" 1235 1141 0.24      
17 A" 1078 996 13.64      
18 A" 1022 944 0.29      
19 A" 809 747 4.61      
20 A" 589 544 28.07      
21 A" 385 356 6.32      

Unscaled Zero Point Vibrational Energy (zpe) 16197.0 cm-1
Scaled (by 0.9237) Zero Point Vibrational Energy (zpe) 14961.2 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 CID/6-31G*
ABC
0.32396 0.29590 0.15920

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 -1.194 0.351 0.000
C2 0.000 1.130 0.000
N3 1.107 0.506 0.000
C4 0.734 -0.897 0.000
C5 -0.762 -0.850 0.000
H6 -0.077 2.207 0.000
H7 1.139 -1.400 0.879
H8 1.139 -1.400 -0.879
H9 -1.424 -1.704 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.42632.30702.29661.27652.16623.04693.04692.0676
C21.42631.27122.15552.12161.07912.91092.91093.1718
N32.30701.27121.45142.30912.07242.09952.09953.3602
C42.29662.15551.45141.49623.20731.09121.09122.3038
C51.27652.12162.30911.49623.13232.16502.16501.0807
H62.16621.07912.07243.20733.13233.90653.90654.1360
H73.04692.91092.09951.09122.16503.90651.75852.7261
H83.04692.91092.09951.09122.16503.90651.75852.7261
H92.06763.17183.36022.30381.08074.13602.72612.7261

picture of 4H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 N3 117.466 N1 C2 H6 119.028
N1 C5 C4 111.605 N1 C5 H9 122.392
C2 N1 C5 103.301 C2 N3 C4 104.500
N3 C2 H6 123.507 N3 C4 C5 103.128
N3 C4 H7 110.525 N3 C4 H8 110.525
C4 C5 H9 126.003 C5 C4 H7 112.655
C5 C4 H8 112.655 H7 C4 H8 107.369
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability