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All results from a given calculation for C3H4N2 (2H-Imidazole)

using model chemistry: CID/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CID/3-21G
 hartrees
Energy at 0K-223.863248
Energy at 298.15K-223.869383
HF Energy-223.436944
Nuclear repulsion energy165.746050
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/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3343 3114 6.50      
2 A1 3171 2954 0.00      
3 A1 1748 1629 27.23      
4 A1 1533 1428 8.00      
5 A1 1410 1314 2.54      
6 A1 1264 1178 4.37      
7 A1 1049 977 19.09      
8 A1 938 874 5.04      
9 A2 1223 1139 0.00      
10 A2 953 887 0.00      
11 A2 590 549 0.00      
12 B1 3218 2998 0.03      
13 B1 1075 1002 23.07      
14 B1 876 816 10.55      
15 B1 391 364 46.69      
16 B2 3325 3097 11.11      
17 B2 1800 1676 0.47      
18 B2 1396 1300 11.60      
19 B2 1318 1228 2.78      
20 B2 1096 1021 35.62      
21 B2 1009 940 79.94      

Unscaled Zero Point Vibrational Energy (zpe) 16361.5 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 15242.4 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/3-21G
ABC
0.35853 0.29913 0.16837

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.222
N2 0.000 0.998 0.279
N3 0.000 -0.998 0.279
C4 0.000 0.740 -0.951
C5 0.000 -0.740 -0.951
H6 -0.898 0.000 1.836
H7 0.898 0.000 1.836
H8 0.000 1.466 -1.743
H9 0.000 -1.466 -1.743

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.37341.37342.29562.29561.08821.08823.30753.3075
N21.37341.99681.25692.12962.05662.05662.07513.1878
N31.37341.99682.12961.25692.05662.05663.18782.0751
C42.29561.25692.12961.48003.02083.02081.07442.3441
C52.29562.12961.25691.48003.02083.02082.34411.0744
H61.08822.05662.05663.02083.02081.79613.97103.9710
H71.08822.05662.05663.02083.02081.79613.97103.9710
H83.30752.07513.18781.07442.34413.97103.97102.9328
H93.30753.18782.07512.34411.07443.97103.97102.9328

picture of 2H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C4 121.506 C1 N3 C5 121.506
N2 C1 N3 93.264 N2 C1 H6 112.820
N2 C1 H7 112.820 N2 C4 C5 101.862
N2 C4 H8 125.599 N3 C1 H6 112.820
N3 C1 H7 112.820 N3 C5 C4 101.862
N3 C5 H9 125.599 C4 C5 H9 132.539
C5 C4 H8 132.539 H6 C1 H7 111.223
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability