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All results from a given calculation for C3H4N2 (4H-Imidazole)

using model chemistry: B2PLYP=FULL/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B2PLYP=FULL/STO-3G
 hartrees
Energy at 0K-222.976381
Energy at 298.15K-222.982006
HF Energy-222.865753
Nuclear repulsion energy155.086816
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 B2PLYP=FULL/STO-3G
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' 3499 3499 4.02      
2 A' 3493 3493 11.11      
3 A' 3361 3361 6.50      
4 A' 1652 1652 8.64      
5 A' 1609 1609 5.34      
6 A' 1550 1550 2.20      
7 A' 1379 1379 3.78      
8 A' 1350 1350 19.18      
9 A' 1308 1308 0.31      
10 A' 1029 1029 13.58      
11 A' 1012 1012 5.24      
12 A' 991 991 7.35      
13 A' 882 882 5.73      
14 A' 860 860 2.37      
15 A" 3467 3467 1.98      
16 A" 1222 1222 0.63      
17 A" 1025 1025 4.21      
18 A" 935 935 0.20      
19 A" 789 789 7.91      
20 A" 552 552 8.17      
21 A" 371 371 6.96      

Unscaled Zero Point Vibrational Energy (zpe) 16168.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16168.0 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 B2PLYP=FULL/STO-3G
ABC
0.30117 0.26974 0.14632

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.267 0.357 0.000
C2 0.000 1.171 0.000
N3 1.169 0.539 0.000
C4 0.757 -0.937 0.000
C5 -0.780 -0.883 0.000
H6 -0.083 2.269 0.000
H7 1.170 -1.436 0.899
H8 1.170 -1.436 -0.899
H9 -1.433 -1.769 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.50572.44262.40151.33172.24963.15533.15532.1322
C21.50571.32882.23932.19691.10182.99472.99473.2706
N32.44261.32881.53262.41292.13552.16952.16953.4787
C42.40152.23931.53261.53793.31441.10771.10772.3429
C51.33172.19692.41291.53793.22872.21712.21711.1008
H62.24961.10182.13553.31443.22874.01284.01284.2584
H73.15532.99472.16951.10772.21714.01281.79752.7742
H83.15532.99472.16951.10772.21714.01281.79752.7742
H92.13223.27063.47872.34291.10084.25842.77422.7742

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 118.895 N1 C2 H6 118.432
N1 C5 C4 113.436 N1 C5 H9 122.174
C2 N1 C5 101.302 C2 N3 C4 102.767
N3 C2 H6 122.673 N3 C4 C5 103.600
N3 C4 H7 109.457 N3 C4 H8 109.457
C4 C5 H9 124.390 C5 C4 H7 112.861
C5 C4 H8 112.861 H7 C4 H8 108.464
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability