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

using model chemistry: QCISD/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at QCISD/6-31G(2df,p)
 hartrees
Energy at 0K-225.599605
Energy at 298.15K-225.605639
HF Energy-224.748016
Nuclear repulsion energy166.687589
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 QCISD/6-31G(2df,p)
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 3283 3111 9.36      
2 A1 3121 2957 0.58      
3 A1 1754 1662 26.65      
4 A1 1458 1381 4.67      
5 A1 1416 1342 11.38      
6 A1 1269 1202 3.26      
7 A1 1048 993 1.76      
8 A1 944 894 14.92      
9 A2 1179 1117 0.00      
10 A2 933 884 0.00      
11 A2 546 517 0.00      
12 B1 3169 3002 0.00      
13 B1 1041 986 19.18      
14 B1 840 795 4.11      
15 B1 359 341 35.43      
16 B2 3268 3096 5.15      
17 B2 1809 1714 0.11      
18 B2 1426 1351 30.59      
19 B2 1268 1201 2.89      
20 B2 1099 1041 30.50      
21 B2 944 894 67.14      

Unscaled Zero Point Vibrational Energy (zpe) 16085.8 cm-1
Scaled (by 0.9474) Zero Point Vibrational Energy (zpe) 15239.7 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 QCISD/6-31G(2df,p)
ABC
0.36141 0.30417 0.17056

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.204
N2 0.000 0.997 0.280
N3 0.000 -0.997 0.280
C4 0.000 0.730 -0.945
C5 0.000 -0.730 -0.945
H6 -0.895 0.000 1.830
H7 0.895 0.000 1.830
H8 0.000 1.475 -1.728
H9 0.000 -1.475 -1.728

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.35971.35972.27022.27021.09191.09193.28243.2824
N21.35971.99431.25372.11772.04902.04902.06413.1846
N31.35971.99432.11771.25372.04902.04903.18462.0641
C42.27021.25372.11771.46063.00603.00601.08032.3398
C52.27022.11771.25371.46063.00603.00602.33981.0803
H61.09192.04902.04903.00603.00601.78973.95433.9543
H71.09192.04902.04903.00603.00601.78973.95433.9543
H83.28242.06413.18461.08032.33983.95433.95432.9491
H93.28243.18462.06412.33981.08033.95433.95432.9491

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 120.546 C1 N3 C5 120.546
N2 C1 N3 94.332 N2 C1 H6 112.931
N2 C1 H7 112.931 N2 C4 C5 102.288
N2 C4 H8 124.169 N3 C1 H6 112.931
N3 C1 H7 112.931 N3 C5 C4 102.288
N3 C5 H9 124.169 C4 C5 H9 133.543
C5 C4 H8 133.543 H6 C1 H7 110.069
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability