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

using model chemistry: CCSD/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCSD/cc-pVDZ
 hartrees
Energy at 0K-225.479625
Energy at 298.15K-225.485624
HF Energy-224.740376
Nuclear repulsion energy165.772975
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 CCSD/cc-pVDZ
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 3267 3095 10.70      
2 A1 3112 2948 1.21      
3 A1 1754 1661 21.73      
4 A1 1448 1372 0.77      
5 A1 1409 1335 15.38      
6 A1 1280 1212 3.35      
7 A1 1044 989 1.33      
8 A1 936 887 16.60      
9 A2 1162 1101 0.00      
10 A2 905 857 0.00      
11 A2 535 507 0.00      
12 B1 3167 3000 0.29      
13 B1 1026 972 21.71      
14 B1 825 781 6.15      
15 B1 345 327 32.43      
16 B2 3251 3080 6.45      
17 B2 1808 1712 0.01      
18 B2 1436 1361 41.84      
19 B2 1252 1186 2.63      
20 B2 1097 1039 26.73      
21 B2 939 889 65.97      

Unscaled Zero Point Vibrational Energy (zpe) 15998.8 cm-1
Scaled (by 0.9473) Zero Point Vibrational Energy (zpe) 15155.6 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 CCSD/cc-pVDZ
ABC
0.35920 0.29976 0.16878

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.212
N2 0.000 0.997 0.283
N3 0.000 -0.997 0.283
C4 0.000 0.734 -0.953
C5 0.000 -0.734 -0.953
H6 -0.903 0.000 1.843
H7 0.903 0.000 1.843
H8 0.000 1.493 -1.739
H9 0.000 -1.493 -1.739

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.36331.36332.28572.28571.10201.10203.30723.3072
N21.36331.99501.26322.12702.06072.06072.08163.2078
N31.36331.99502.12701.26322.06072.06073.20782.0816
C42.28571.26322.12701.46793.02863.02861.09292.3616
C52.28572.12701.26321.46793.02863.02862.36161.0929
H61.10202.06072.06073.02863.02861.80633.98483.9848
H71.10202.06072.06073.02863.02861.80633.98483.9848
H83.30722.08163.20781.09292.36163.98483.98482.9858
H93.30723.20782.08162.36161.09293.98483.98482.9858

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 120.930 C1 N3 C5 120.930
N2 C1 N3 94.053 N2 C1 H6 112.988
N2 C1 H7 112.988 N2 C4 C5 102.043
N2 C4 H8 123.972 N3 C1 H6 112.988
N3 C1 H7 112.988 N3 C5 C4 102.043
N3 C5 H9 123.972 C4 C5 H9 133.985
C5 C4 H8 133.985 H6 C1 H7 110.091
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability